/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-lopstr16/partial_lesser_bound.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:50:03,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:50:03,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:50:03,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:50:03,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:50:03,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:50:03,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:50:03,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:50:03,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:50:03,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:50:03,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:50:03,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:50:03,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:50:03,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:50:03,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:50:03,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:50:03,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:50:03,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:50:03,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:50:03,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:50:03,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:50:03,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:50:03,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:50:03,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:50:03,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:50:03,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:50:03,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:50:03,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:50:03,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:50:03,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:50:03,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:50:03,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:50:03,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:50:03,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:50:03,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:50:03,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:50:03,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:50:03,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:50:03,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:50:03,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:50:03,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:50:03,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:50:03,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:50:03,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:50:03,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:50:03,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:50:03,369 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:50:03,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:50:03,369 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:50:03,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:50:03,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:50:03,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:50:03,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:50:03,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:50:03,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:50:03,372 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:50:03,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:50:03,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:50:03,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:50:03,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:50:03,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:50:03,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:50:03,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:50:03,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:50:03,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:50:03,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:50:03,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:50:03,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:50:03,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:50:03,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:50:03,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:50:03,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:50:03,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:50:03,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:50:03,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:50:03,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:50:03,829 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:50:03,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/partial_lesser_bound.i [2020-10-27 14:50:03,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c0ee90e6/b98e295c178a408a8657fd34930d9733/FLAGc65979e4a [2020-10-27 14:50:04,617 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:50:04,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/partial_lesser_bound.i [2020-10-27 14:50:04,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c0ee90e6/b98e295c178a408a8657fd34930d9733/FLAGc65979e4a [2020-10-27 14:50:05,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c0ee90e6/b98e295c178a408a8657fd34930d9733 [2020-10-27 14:50:05,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:50:05,012 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:50:05,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:50:05,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:50:05,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:50:05,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:50:05" (1/1) ... [2020-10-27 14:50:05,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3630506e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05, skipping insertion in model container [2020-10-27 14:50:05,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:50:05" (1/1) ... [2020-10-27 14:50:05,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:50:05,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:50:05,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:50:05,262 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:50:05,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:50:05,319 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:50:05,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05 WrapperNode [2020-10-27 14:50:05,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:50:05,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:50:05,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:50:05,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:50:05,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05" (1/1) ... [2020-10-27 14:50:05,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05" (1/1) ... [2020-10-27 14:50:05,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05" (1/1) ... [2020-10-27 14:50:05,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05" (1/1) ... [2020-10-27 14:50:05,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05" (1/1) ... [2020-10-27 14:50:05,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05" (1/1) ... [2020-10-27 14:50:05,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05" (1/1) ... [2020-10-27 14:50:05,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:50:05,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:50:05,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:50:05,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:50:05,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:50:05,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:50:05,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:50:05,492 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:50:05,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:50:05,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:50:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:50:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:50:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:50:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:50:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:50:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:50:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:50:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:50:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:50:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:50:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 14:50:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 14:50:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:50:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:50:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:50:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:50:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:50:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:50:06,039 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:50:06,039 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:50:06,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:50:06 BoogieIcfgContainer [2020-10-27 14:50:06,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:50:06,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:50:06,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:50:06,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:50:06,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:50:05" (1/3) ... [2020-10-27 14:50:06,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ebf393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:50:06, skipping insertion in model container [2020-10-27 14:50:06,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:50:05" (2/3) ... [2020-10-27 14:50:06,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ebf393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:50:06, skipping insertion in model container [2020-10-27 14:50:06,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:50:06" (3/3) ... [2020-10-27 14:50:06,056 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound.i [2020-10-27 14:50:06,073 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:50:06,079 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:50:06,095 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:50:06,143 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:50:06,143 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:50:06,143 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:50:06,144 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:50:06,144 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:50:06,144 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:50:06,144 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:50:06,145 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:50:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-27 14:50:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:50:06,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:06,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:06,185 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-27 14:50:06,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:06,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533407565] [2020-10-27 14:50:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:06,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:06,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:06,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:06,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:50:06,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:06,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 14:50:06,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:50:06,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:06,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:50:06,756 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-27 14:50:06,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:06,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:06,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:06,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:06,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 14:50:06,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:06,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:06,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:06,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:06,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:50:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:50:06,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533407565] [2020-10-27 14:50:06,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:50:06,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:50:06,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301290835] [2020-10-27 14:50:06,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:50:06,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:06,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:50:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:50:06,882 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-27 14:50:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:07,042 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-27 14:50:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:50:07,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:50:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:07,052 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:50:07,052 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 14:50:07,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:50:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 14:50:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 14:50:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 14:50:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 14:50:07,100 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-27 14:50:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:07,101 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 14:50:07,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:50:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 14:50:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:50:07,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:07,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:07,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:50:07,103 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-27 14:50:07,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:07,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812356884] [2020-10-27 14:50:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:07,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:07,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:07,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:07,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:50:07,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:07,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 14:50:07,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:07,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:50:07,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:50:07,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:50:07,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:50:07,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:07,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:07,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:07,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:07,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:07,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 14:50:07,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:07,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:50:07,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812356884] [2020-10-27 14:50:07,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:50:07,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:50:07,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790821060] [2020-10-27 14:50:07,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:50:07,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:50:07,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:50:07,473 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-27 14:50:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:07,670 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-27 14:50:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:50:07,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 14:50:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:07,672 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:50:07,673 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:50:07,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 14:50:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:50:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-27 14:50:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 14:50:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 14:50:07,684 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2020-10-27 14:50:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:07,684 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 14:50:07,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:50:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 14:50:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:50:07,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:07,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:07,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:50:07,686 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash -999640386, now seen corresponding path program 1 times [2020-10-27 14:50:07,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:07,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853498449] [2020-10-27 14:50:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:07,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:07,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:07,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:08,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:08,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:50:08,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:50:08,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-10-27 14:50:08,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:08,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:50:08,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:50:08,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:50:08,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:09,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:09,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:09,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:09,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:50:09,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:09,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:50:09,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853498449] [2020-10-27 14:50:09,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:09,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:50:09,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129262938] [2020-10-27 14:50:09,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:50:09,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:09,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:50:09,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:50:09,068 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-27 14:50:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:09,342 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-27 14:50:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:50:09,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 14:50:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:09,344 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:50:09,344 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:50:09,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:50:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:50:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2020-10-27 14:50:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 14:50:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 14:50:09,355 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-27 14:50:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:09,355 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 14:50:09,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:50:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 14:50:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:50:09,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:09,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:09,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:50:09,357 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:09,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:09,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1354504774, now seen corresponding path program 2 times [2020-10-27 14:50:09,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:09,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144544428] [2020-10-27 14:50:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:09,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:12,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:12,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:50:12,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:50:12,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-27 14:50:12,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:12,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:50:12,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:50:12,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:50:12,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:12,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:12,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:12,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:12,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:12,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:12,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:50:12,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:12,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:12,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:50:12,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144544428] [2020-10-27 14:50:12,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:12,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:50:12,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404807510] [2020-10-27 14:50:12,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:50:12,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:12,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:50:12,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:50:12,387 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2020-10-27 14:50:12,730 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 14:50:12,847 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-27 14:50:12,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:12,980 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-27 14:50:12,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:50:12,980 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 14:50:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:12,981 INFO L225 Difference]: With dead ends: 42 [2020-10-27 14:50:12,982 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 14:50:12,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:50:12,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 14:50:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-27 14:50:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:50:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 14:50:12,993 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2020-10-27 14:50:12,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:12,993 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 14:50:12,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:50:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 14:50:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:50:12,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:12,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:12,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:50:12,995 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:12,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1553956332, now seen corresponding path program 1 times [2020-10-27 14:50:12,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:12,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126253585] [2020-10-27 14:50:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:13,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:13,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:13,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:13,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:15,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:18,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:18,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:50:18,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:50:18,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:50:18,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:50:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:50:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:50:18,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:18,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:18,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:18,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:18,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:18,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:50:18,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:18,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:18,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:18,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:18,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:18,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:50:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:18,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:18,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:18,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:18,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:18,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:50:18,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:18,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:50:18,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:18,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:50:18,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:50:18,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126253585] [2020-10-27 14:50:18,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:18,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:50:18,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746374294] [2020-10-27 14:50:18,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:50:18,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:18,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:50:18,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:50:18,210 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2020-10-27 14:50:18,997 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-27 14:50:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:19,196 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-27 14:50:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:50:19,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 14:50:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:19,198 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:50:19,198 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:50:19,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:50:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:50:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-27 14:50:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 14:50:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-27 14:50:19,209 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-10-27 14:50:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:19,210 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-27 14:50:19,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:50:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-27 14:50:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:50:19,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:19,211 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:19,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:50:19,212 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1892670354, now seen corresponding path program 2 times [2020-10-27 14:50:19,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:19,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220071316] [2020-10-27 14:50:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:19,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:19,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:19,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:19,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:19,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:20,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:21,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:23,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:23,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:24,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:24,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:24,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:50:24,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:50:24,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-27 14:50:24,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:50:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:50:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:50:24,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:24,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:24,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:24,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:24,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:24,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:24,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:50:24,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:24,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:24,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:24,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:24,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:24,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:50:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:24,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:24,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:24,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:24,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:24,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:24,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:24,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:24,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:24,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:24,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:24,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 14:50:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:24,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:24,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:24,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:24,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:24,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:24,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:24,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:50:24,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220071316] [2020-10-27 14:50:24,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:24,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:50:24,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525916205] [2020-10-27 14:50:24,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:50:24,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:50:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:50:24,489 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 6 states. [2020-10-27 14:50:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:24,833 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-27 14:50:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:50:24,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-27 14:50:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:24,839 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:50:24,839 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:50:24,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:50:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:50:24,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-10-27 14:50:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:50:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-27 14:50:24,869 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2020-10-27 14:50:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:24,870 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-27 14:50:24,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:50:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-27 14:50:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:50:24,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:24,872 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:24,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:50:24,872 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:24,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash -29429398, now seen corresponding path program 3 times [2020-10-27 14:50:24,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:24,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369404164] [2020-10-27 14:50:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:24,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:24,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:24,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:25,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:25,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:26,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:27,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:27,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:28,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:28,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:29,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:29,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:50:29,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:50:29,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:50:29,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:50:29,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:50:29,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:50:29,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:29,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:30,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:30,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:30,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:30,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:30,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:50:30,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:30,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:30,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:30,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:30,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:30,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 14:50:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:30,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:30,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:30,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:30,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:30,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:30,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:30,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:30,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 14:50:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:30,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:30,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:30,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:30,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:30,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:30,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:30,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:30,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:30,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:30,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:50:30,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369404164] [2020-10-27 14:50:30,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:30,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:50:30,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971669359] [2020-10-27 14:50:30,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:50:30,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:30,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:50:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:50:30,030 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 7 states. [2020-10-27 14:50:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:30,482 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-10-27 14:50:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:50:30,483 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-27 14:50:30,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:30,484 INFO L225 Difference]: With dead ends: 115 [2020-10-27 14:50:30,484 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 14:50:30,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:50:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 14:50:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-10-27 14:50:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 14:50:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-27 14:50:30,509 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-27 14:50:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:30,510 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-27 14:50:30,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:50:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-27 14:50:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:50:30,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:30,511 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:30,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:50:30,512 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1520160870, now seen corresponding path program 4 times [2020-10-27 14:50:30,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:30,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950912745] [2020-10-27 14:50:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:30,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:30,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:30,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:31,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:32,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:32,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:35,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:35,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:35,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:50:35,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:50:35,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:50:35,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:35,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:50:35,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:50:35,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:50:35,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:35,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:35,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:35,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:35,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:35,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:35,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:50:35,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:35,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:35,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 14:50:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:35,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:35,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:35,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:35,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:35,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:35,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:35,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:35,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:35,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:35,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:35,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 14:50:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:35,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:35,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:35,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:35,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:35,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:50:35,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:35,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:35,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:35,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:35,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:50:35,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950912745] [2020-10-27 14:50:35,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:35,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:50:35,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465588000] [2020-10-27 14:50:35,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:50:35,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:50:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:50:35,694 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 8 states. [2020-10-27 14:50:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:36,248 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-10-27 14:50:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:50:36,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-27 14:50:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:36,250 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:50:36,250 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:50:36,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:50:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:50:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 56. [2020-10-27 14:50:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:50:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-27 14:50:36,264 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-10-27 14:50:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:36,264 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-27 14:50:36,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:50:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-27 14:50:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:50:36,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:36,265 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:36,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:50:36,266 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:36,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:36,266 INFO L82 PathProgramCache]: Analyzing trace with hash 829538658, now seen corresponding path program 5 times [2020-10-27 14:50:36,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:36,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090529915] [2020-10-27 14:50:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:36,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:36,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:36,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:37,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:37,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:38,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:40,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:40,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:41,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:41,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:50:41,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:50:41,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:50:41,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:50:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:50:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:50:41,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:41,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:41,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:41,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:41,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:41,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:41,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:50:41,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:41,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:41,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 14:50:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:41,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:41,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:41,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:41,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:41,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:41,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:41,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:41,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-27 14:50:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:41,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:41,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:41,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:41,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:41,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:41,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:41,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:41,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:41,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:41,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-27 14:50:41,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090529915] [2020-10-27 14:50:41,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:41,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:50:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79982851] [2020-10-27 14:50:41,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:50:41,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:41,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:50:41,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:50:41,426 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 9 states. [2020-10-27 14:50:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:42,029 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2020-10-27 14:50:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:50:42,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 14:50:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:42,032 INFO L225 Difference]: With dead ends: 151 [2020-10-27 14:50:42,032 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 14:50:42,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:50:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 14:50:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 60. [2020-10-27 14:50:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:50:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-27 14:50:42,057 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-10-27 14:50:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:42,057 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-27 14:50:42,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:50:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-27 14:50:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:50:42,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:42,059 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:42,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:50:42,062 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:42,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:42,063 INFO L82 PathProgramCache]: Analyzing trace with hash -244595618, now seen corresponding path program 6 times [2020-10-27 14:50:42,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:42,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222945341] [2020-10-27 14:50:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:42,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:42,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:43,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:43,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:44,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:46,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:47,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:47,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:50:47,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:50:47,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-27 14:50:47,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:47,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:50:47,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:50:47,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:50:47,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:47,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:47,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:47,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:47,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:47,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:47,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:50:47,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:47,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:47,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:47,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 14:50:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:47,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:47,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:47,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:47,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:47,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:47,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:47,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:47,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:47,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 14:50:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:47,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:47,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:47,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:47,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:47,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:47,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:47,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:47,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:47,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-27 14:50:47,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222945341] [2020-10-27 14:50:47,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:47,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:50:47,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945123575] [2020-10-27 14:50:47,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:50:47,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:50:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:50:47,334 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2020-10-27 14:50:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:48,005 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2020-10-27 14:50:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:50:48,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 14:50:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:48,007 INFO L225 Difference]: With dead ends: 169 [2020-10-27 14:50:48,007 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 14:50:48,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:50:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 14:50:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2020-10-27 14:50:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 14:50:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-27 14:50:48,033 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-27 14:50:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:48,033 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-27 14:50:48,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:50:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-27 14:50:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:50:48,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:48,035 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:48,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:50:48,040 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:48,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1790237018, now seen corresponding path program 7 times [2020-10-27 14:50:48,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:48,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711279709] [2020-10-27 14:50:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:48,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:48,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:48,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:48,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:52,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:53,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:53,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:50:53,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:50:53,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5296 [2020-10-27 14:50:53,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:50:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:50:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:50:53,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:53,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:53,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:53,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:53,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:53,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:53,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:50:53,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:53,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:53,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:53,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:53,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:53,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-27 14:50:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:53,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:53,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:53,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:53,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:53,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:50:53,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:53,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:53,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-27 14:50:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:53,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:53,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:53,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:53,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:50:53,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:53,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-27 14:50:53,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711279709] [2020-10-27 14:50:53,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:53,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:50:53,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014440291] [2020-10-27 14:50:53,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:50:53,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:53,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:50:53,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:50:53,529 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 11 states. [2020-10-27 14:50:54,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:54,325 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2020-10-27 14:50:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:50:54,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-27 14:50:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:54,327 INFO L225 Difference]: With dead ends: 187 [2020-10-27 14:50:54,329 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 14:50:54,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:50:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 14:50:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 68. [2020-10-27 14:50:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:50:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-27 14:50:54,351 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-27 14:50:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:54,351 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-27 14:50:54,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:50:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-27 14:50:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:50:54,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:54,357 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:54,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:50:54,360 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1324875862, now seen corresponding path program 8 times [2020-10-27 14:50:54,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:54,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882121368] [2020-10-27 14:50:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:54,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:54,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:54,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:55,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:56,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:57,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:59,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:59,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:50:59,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:50:59,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:50:59,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:50:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:50:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:50:59,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:59,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:59,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:59,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:59,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:59,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:59,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:50:59,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:59,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 14:50:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:59,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:59,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:59,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:59,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:59,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:59,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:59,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:50:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:59,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:59,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:59,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:50:59,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:59,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:59,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:50:59,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:59,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 14:50:59,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882121368] [2020-10-27 14:50:59,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:59,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:50:59,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966585817] [2020-10-27 14:50:59,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:50:59,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:59,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:50:59,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:50:59,587 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 12 states. [2020-10-27 14:51:00,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:00,474 INFO L93 Difference]: Finished difference Result 205 states and 210 transitions. [2020-10-27 14:51:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:51:00,474 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-27 14:51:00,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:00,476 INFO L225 Difference]: With dead ends: 205 [2020-10-27 14:51:00,476 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 14:51:00,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:51:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 14:51:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 72. [2020-10-27 14:51:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:51:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-27 14:51:00,489 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-10-27 14:51:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:00,490 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-27 14:51:00,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:51:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-27 14:51:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:51:00,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:00,491 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:00,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:51:00,492 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1319093934, now seen corresponding path program 9 times [2020-10-27 14:51:00,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:00,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006302081] [2020-10-27 14:51:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:00,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:00,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:01,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:01,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:03,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:04,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:05,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:05,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:51:05,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:51:05,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5198 [2020-10-27 14:51:05,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:51:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:51:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:51:05,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:05,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:05,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:05,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:05,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:05,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:05,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:51:05,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:05,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:05,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:05,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-27 14:51:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:05,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:05,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:05,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:05,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:05,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:05,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:05,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:05,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:05,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:05,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:05,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-27 14:51:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:05,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:05,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:05,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:05,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:05,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:05,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:05,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:05,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:05,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:05,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-27 14:51:05,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006302081] [2020-10-27 14:51:05,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:05,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:51:05,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084318079] [2020-10-27 14:51:05,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:51:05,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:51:05,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:51:05,926 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 13 states. [2020-10-27 14:51:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:07,031 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2020-10-27 14:51:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:51:07,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-10-27 14:51:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:07,034 INFO L225 Difference]: With dead ends: 223 [2020-10-27 14:51:07,034 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:51:07,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:51:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:51:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 76. [2020-10-27 14:51:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:51:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-27 14:51:07,060 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-10-27 14:51:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:07,060 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-27 14:51:07,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:51:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-27 14:51:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:51:07,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:07,063 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:07,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:51:07,064 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2036825010, now seen corresponding path program 10 times [2020-10-27 14:51:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:07,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644165220] [2020-10-27 14:51:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:07,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:07,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:07,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:08,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:12,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:12,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:51:12,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:51:12,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:51:12,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:51:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:51:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:51:12,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:12,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:12,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:12,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:12,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:12,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:12,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:51:12,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:12,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:12,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:51:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:12,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:12,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:12,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:12,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:12,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:12,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:12,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:12,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:12,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:12,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:12,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:51:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:12,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:12,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:12,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:12,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:12,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:12,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:12,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-27 14:51:12,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644165220] [2020-10-27 14:51:12,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:12,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:51:12,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57122233] [2020-10-27 14:51:12,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:51:12,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:51:12,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:51:12,331 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 14 states. [2020-10-27 14:51:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:13,522 INFO L93 Difference]: Finished difference Result 241 states and 246 transitions. [2020-10-27 14:51:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:51:13,523 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-27 14:51:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:13,526 INFO L225 Difference]: With dead ends: 241 [2020-10-27 14:51:13,526 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 14:51:13,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:51:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 14:51:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 80. [2020-10-27 14:51:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:51:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-27 14:51:13,545 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-27 14:51:13,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:13,548 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-27 14:51:13,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:51:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-27 14:51:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:51:13,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:13,555 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:13,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:51:13,556 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:13,556 INFO L82 PathProgramCache]: Analyzing trace with hash 617341258, now seen corresponding path program 11 times [2020-10-27 14:51:13,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:13,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324599144] [2020-10-27 14:51:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:13,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:13,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:13,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:15,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:18,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:18,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:51:18,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:51:18,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 14:51:18,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:51:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:51:18,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:51:18,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:18,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:18,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:18,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:18,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:18,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:18,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:51:18,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:18,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:18,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:18,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:18,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:51:18,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-27 14:51:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:18,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:18,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:18,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:18,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:51:18,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:18,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:18,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-27 14:51:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:18,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:18,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:18,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:18,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:18,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:18,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:18,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:18,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:18,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:18,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-10-27 14:51:18,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324599144] [2020-10-27 14:51:18,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:18,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:51:18,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109707218] [2020-10-27 14:51:18,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:51:18,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:51:18,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:51:18,897 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 15 states. [2020-10-27 14:51:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:20,230 INFO L93 Difference]: Finished difference Result 259 states and 264 transitions. [2020-10-27 14:51:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:51:20,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2020-10-27 14:51:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:20,232 INFO L225 Difference]: With dead ends: 259 [2020-10-27 14:51:20,232 INFO L226 Difference]: Without dead ends: 208 [2020-10-27 14:51:20,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:51:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-27 14:51:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 84. [2020-10-27 14:51:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:51:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-27 14:51:20,253 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-10-27 14:51:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:20,253 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-27 14:51:20,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:51:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-27 14:51:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:51:20,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:20,254 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:20,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:51:20,254 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1012576186, now seen corresponding path program 12 times [2020-10-27 14:51:20,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:20,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454455272] [2020-10-27 14:51:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:20,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:21,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:24,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:26,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:26,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:51:26,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:51:26,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6313 [2020-10-27 14:51:26,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:26,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:51:26,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:51:26,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:51:26,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:26,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:26,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:26,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:26,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:26,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:26,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:51:26,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:26,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:26,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:26,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:26,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:26,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:51:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:26,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:26,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:26,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:26,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:26,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:26,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:26,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:26,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:26,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:26,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:26,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:51:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:26,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:26,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:26,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:26,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:26,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:26,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:26,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-27 14:51:26,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454455272] [2020-10-27 14:51:26,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:26,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:51:26,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412899412] [2020-10-27 14:51:26,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:51:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:26,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:51:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:51:26,866 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 16 states. [2020-10-27 14:51:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:28,226 INFO L93 Difference]: Finished difference Result 277 states and 282 transitions. [2020-10-27 14:51:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:51:28,227 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-10-27 14:51:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:28,229 INFO L225 Difference]: With dead ends: 277 [2020-10-27 14:51:28,229 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 14:51:28,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:51:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 14:51:28,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 88. [2020-10-27 14:51:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:51:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-27 14:51:28,242 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-10-27 14:51:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:28,243 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-27 14:51:28,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:51:28,243 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-27 14:51:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:51:28,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:28,244 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:28,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:51:28,244 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash -61877950, now seen corresponding path program 13 times [2020-10-27 14:51:28,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:28,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216291668] [2020-10-27 14:51:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:28,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:28,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:33,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:33,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:51:33,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:51:33,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5381 [2020-10-27 14:51:33,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:51:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:51:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:51:33,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:33,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:33,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:33,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:33,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:33,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:51:33,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:33,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:33,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:33,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:33,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:33,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-27 14:51:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:33,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:33,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:33,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:33,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:33,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:33,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:33,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:33,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-27 14:51:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:33,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:33,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:33,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:33,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:33,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:33,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:33,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 169 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-10-27 14:51:33,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216291668] [2020-10-27 14:51:33,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:33,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:51:33,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999182759] [2020-10-27 14:51:33,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:51:33,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:51:33,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:51:33,933 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 17 states. [2020-10-27 14:51:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:35,418 INFO L93 Difference]: Finished difference Result 295 states and 300 transitions. [2020-10-27 14:51:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:51:35,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-10-27 14:51:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:35,422 INFO L225 Difference]: With dead ends: 295 [2020-10-27 14:51:35,422 INFO L226 Difference]: Without dead ends: 240 [2020-10-27 14:51:35,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:51:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-27 14:51:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 92. [2020-10-27 14:51:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:51:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-27 14:51:35,439 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2020-10-27 14:51:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:35,439 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-27 14:51:35,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:51:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-27 14:51:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:51:35,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:35,440 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:35,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:51:35,441 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1232495678, now seen corresponding path program 14 times [2020-10-27 14:51:35,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:35,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105290733] [2020-10-27 14:51:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:35,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:35,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:36,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:40,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:40,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:51:40,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:51:40,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:51:40,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:40,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:51:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:51:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:51:40,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:40,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:40,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:40,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:40,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:40,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:40,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:51:40,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:40,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:40,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:40,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:40,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:40,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:51:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:40,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:40,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:40,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:40,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:51:40,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:40,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:40,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:40,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:40,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:40,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-27 14:51:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:40,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:40,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:40,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:40,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:40,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:40,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:40,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-10-27 14:51:40,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105290733] [2020-10-27 14:51:40,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:40,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:51:40,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677336921] [2020-10-27 14:51:40,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:51:40,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:51:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:51:40,776 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 18 states. [2020-10-27 14:51:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:42,395 INFO L93 Difference]: Finished difference Result 313 states and 318 transitions. [2020-10-27 14:51:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:51:42,397 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 89 [2020-10-27 14:51:42,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:42,399 INFO L225 Difference]: With dead ends: 313 [2020-10-27 14:51:42,400 INFO L226 Difference]: Without dead ends: 256 [2020-10-27 14:51:42,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:51:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-27 14:51:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 96. [2020-10-27 14:51:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:51:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-27 14:51:42,417 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2020-10-27 14:51:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:42,418 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-27 14:51:42,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:51:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-27 14:51:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:51:42,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:42,419 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:42,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:51:42,419 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2025584326, now seen corresponding path program 15 times [2020-10-27 14:51:42,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:42,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165238265] [2020-10-27 14:51:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:42,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:42,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:43,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:48,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:48,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:51:48,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:51:48,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6451 [2020-10-27 14:51:48,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:48,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:51:48,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:51:48,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:51:48,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:49,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:49,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:49,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:49,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:49,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:49,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:51:49,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:49,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:49,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:49,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:49,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:49,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-27 14:51:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:49,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:49,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:49,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:49,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:49,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:49,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:49,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:49,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:49,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:49,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:49,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 14:51:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:49,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:49,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:49,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:49,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:49,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:49,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:49,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:49,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:49,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:49,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 4 proven. 225 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2020-10-27 14:51:49,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165238265] [2020-10-27 14:51:49,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:49,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:51:49,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105289805] [2020-10-27 14:51:49,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:51:49,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:51:49,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:51:49,232 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 19 states. [2020-10-27 14:51:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:51,026 INFO L93 Difference]: Finished difference Result 331 states and 336 transitions. [2020-10-27 14:51:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:51:51,027 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2020-10-27 14:51:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:51,029 INFO L225 Difference]: With dead ends: 331 [2020-10-27 14:51:51,030 INFO L226 Difference]: Without dead ends: 272 [2020-10-27 14:51:51,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:51:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-27 14:51:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 100. [2020-10-27 14:51:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 14:51:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-27 14:51:51,054 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2020-10-27 14:51:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:51,055 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-27 14:51:51,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:51:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-27 14:51:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:51:51,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:51,056 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:51,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:51:51,056 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:51,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1935917110, now seen corresponding path program 16 times [2020-10-27 14:51:51,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:51,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460390902] [2020-10-27 14:51:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:51,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:51,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:52,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:58,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:58,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:51:58,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:51:58,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7735 [2020-10-27 14:51:58,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:51:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:51:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:51:58,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:59,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:59,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:59,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:59,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:51:59,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:59,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-27 14:51:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:59,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:59,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:59,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:59,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:59,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:59,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:59,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:59,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:59,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:59,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:59,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 14:51:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:59,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:59,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:59,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:59,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:59,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:59,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:51:59,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:59,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-10-27 14:51:59,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460390902] [2020-10-27 14:51:59,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:59,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:51:59,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000846013] [2020-10-27 14:51:59,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:51:59,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:51:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:51:59,205 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 20 states. [2020-10-27 14:52:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:01,128 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2020-10-27 14:52:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:52:01,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-10-27 14:52:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:01,131 INFO L225 Difference]: With dead ends: 349 [2020-10-27 14:52:01,131 INFO L226 Difference]: Without dead ends: 288 [2020-10-27 14:52:01,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:52:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-27 14:52:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 104. [2020-10-27 14:52:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 14:52:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-27 14:52:01,151 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-10-27 14:52:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:01,152 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-27 14:52:01,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:52:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-27 14:52:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:52:01,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:01,153 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:01,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:52:01,153 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash 755009842, now seen corresponding path program 17 times [2020-10-27 14:52:01,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:01,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967719790] [2020-10-27 14:52:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:01,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:01,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:02,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 14:52:09,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:09,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8163 [2020-10-27 14:52:09,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:52:09,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:52:09,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:52:09,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:09,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:09,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:09,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:09,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:09,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:09,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 14:52:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:09,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:09,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:09,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:09,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:09,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:09,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 14:52:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:09,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:09,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:09,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:09,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 4 proven. 289 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-27 14:52:09,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967719790] [2020-10-27 14:52:09,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:09,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:52:09,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924586979] [2020-10-27 14:52:09,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:52:09,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:09,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:52:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:52:09,733 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 21 states. [2020-10-27 14:52:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:11,861 INFO L93 Difference]: Finished difference Result 367 states and 372 transitions. [2020-10-27 14:52:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:52:11,861 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 101 [2020-10-27 14:52:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:11,864 INFO L225 Difference]: With dead ends: 367 [2020-10-27 14:52:11,864 INFO L226 Difference]: Without dead ends: 304 [2020-10-27 14:52:11,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:52:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-27 14:52:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 108. [2020-10-27 14:52:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 14:52:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-27 14:52:11,881 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2020-10-27 14:52:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:11,881 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-27 14:52:11,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:52:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-27 14:52:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:52:11,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:11,882 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:11,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:52:11,882 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1262132178, now seen corresponding path program 18 times [2020-10-27 14:52:11,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:11,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021407091] [2020-10-27 14:52:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:11,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:17,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:17,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:52:17,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:17,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5484 [2020-10-27 14:52:17,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:52:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:52:17,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:52:17,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:17,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:17,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:17,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 14:52:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:17,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:17,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:17,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:17,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:17,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:17,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:17,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:17,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:17,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:17,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:17,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 14:52:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:17,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:17,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:17,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:17,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:17,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:17,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:17,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2020-10-27 14:52:17,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021407091] [2020-10-27 14:52:17,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:17,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:52:17,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62689412] [2020-10-27 14:52:17,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:52:17,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:52:17,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:52:17,833 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 22 states. [2020-10-27 14:52:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:20,108 INFO L93 Difference]: Finished difference Result 385 states and 390 transitions. [2020-10-27 14:52:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:52:20,112 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2020-10-27 14:52:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:20,113 INFO L225 Difference]: With dead ends: 385 [2020-10-27 14:52:20,113 INFO L226 Difference]: Without dead ends: 320 [2020-10-27 14:52:20,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:52:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-27 14:52:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 112. [2020-10-27 14:52:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 14:52:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-27 14:52:20,134 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2020-10-27 14:52:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:20,134 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-27 14:52:20,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:52:20,135 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-27 14:52:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 14:52:20,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:20,135 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:20,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:52:20,136 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:20,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:20,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1826443562, now seen corresponding path program 19 times [2020-10-27 14:52:20,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:20,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387095903] [2020-10-27 14:52:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:21,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:26,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:52:26,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:26,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6083 [2020-10-27 14:52:26,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:52:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:52:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:52:26,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:26,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:26,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:26,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:26,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:26,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:52:26,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:26,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:26,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:26,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:26,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:26,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 14:52:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:26,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:26,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:26,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:26,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:52:26,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:26,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:52:26,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 14:52:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:26,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:26,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:26,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:26,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:26,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:26,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:26,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:26,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:26,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 4 proven. 361 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2020-10-27 14:52:26,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387095903] [2020-10-27 14:52:26,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:26,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:52:26,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314649076] [2020-10-27 14:52:26,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:52:26,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:26,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:52:26,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:52:26,720 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 23 states. [2020-10-27 14:52:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:29,085 INFO L93 Difference]: Finished difference Result 403 states and 408 transitions. [2020-10-27 14:52:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:52:29,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-10-27 14:52:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:29,087 INFO L225 Difference]: With dead ends: 403 [2020-10-27 14:52:29,087 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 14:52:29,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:52:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 14:52:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 116. [2020-10-27 14:52:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:52:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-27 14:52:29,112 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 109 [2020-10-27 14:52:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:29,113 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-27 14:52:29,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:52:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-27 14:52:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:52:29,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:29,114 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:29,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:52:29,114 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1728884698, now seen corresponding path program 20 times [2020-10-27 14:52:29,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:29,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370156412] [2020-10-27 14:52:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:29,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:32,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:39,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:39,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 14:52:39,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:39,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10672 [2020-10-27 14:52:39,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:39,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:52:39,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:52:39,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:52:39,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:40,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:40,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:40,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:40,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:40,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:40,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:40,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:40,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:40,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:40,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:40,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:40,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 14:52:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:40,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:40,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:40,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:40,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:40,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:40,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:40,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:40,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:40,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-27 14:52:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:40,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:40,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:40,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:40,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:40,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:40,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:40,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:40,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-10-27 14:52:40,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370156412] [2020-10-27 14:52:40,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:40,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:52:40,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082689425] [2020-10-27 14:52:40,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:52:40,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:52:40,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:52:40,344 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 24 states. [2020-10-27 14:52:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:42,953 INFO L93 Difference]: Finished difference Result 421 states and 426 transitions. [2020-10-27 14:52:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 14:52:42,954 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-10-27 14:52:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:42,957 INFO L225 Difference]: With dead ends: 421 [2020-10-27 14:52:42,957 INFO L226 Difference]: Without dead ends: 352 [2020-10-27 14:52:42,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:52:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-27 14:52:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 120. [2020-10-27 14:52:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 14:52:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-27 14:52:42,989 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2020-10-27 14:52:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:42,990 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-27 14:52:42,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:52:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-27 14:52:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 14:52:42,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:42,992 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:42,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:52:42,992 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash -567123678, now seen corresponding path program 21 times [2020-10-27 14:52:42,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:42,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897770669] [2020-10-27 14:52:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:43,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:43,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:48,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:48,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 14:52:48,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:48,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5275 [2020-10-27 14:52:48,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:48,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:52:48,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:52:48,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:52:48,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:48,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:48,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:48,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:48,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:48,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:48,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:48,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:48,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:48,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:48,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 14:52:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:48,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:48,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:48,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:48,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:48,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:48,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:48,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:48,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 14:52:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:48,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:48,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:48,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:48,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:48,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:48,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:48,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 4 proven. 441 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2020-10-27 14:52:48,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897770669] [2020-10-27 14:52:48,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:48,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:52:48,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468581068] [2020-10-27 14:52:48,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:52:48,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:52:48,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:52:48,836 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 25 states. [2020-10-27 14:52:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:51,667 INFO L93 Difference]: Finished difference Result 439 states and 444 transitions. [2020-10-27 14:52:51,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:52:51,668 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2020-10-27 14:52:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:51,670 INFO L225 Difference]: With dead ends: 439 [2020-10-27 14:52:51,670 INFO L226 Difference]: Without dead ends: 368 [2020-10-27 14:52:51,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:52:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-27 14:52:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 124. [2020-10-27 14:52:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 14:52:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-27 14:52:51,697 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-10-27 14:52:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:51,697 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-27 14:52:51,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:52:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-27 14:52:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 14:52:51,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:51,698 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:51,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:52:51,699 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:51,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1018854370, now seen corresponding path program 22 times [2020-10-27 14:52:51,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:51,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942758421] [2020-10-27 14:52:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:51,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:51,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:56,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:56,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 14:52:56,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:56,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5174 [2020-10-27 14:52:56,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:56,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:52:56,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:52:56,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:52:56,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:57,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:57,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:57,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:57,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:57,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:57,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:57,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:57,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:57,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:57,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:52:57,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-27 14:52:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:57,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:57,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:57,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:57,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:57,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:57,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:57,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:57,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-27 14:52:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:57,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:57,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:57,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:57,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:57,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:57,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:52:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:57,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 4 proven. 484 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-27 14:52:57,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942758421] [2020-10-27 14:52:57,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:57,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:52:57,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952953868] [2020-10-27 14:52:57,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:52:57,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:52:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:52:57,458 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 26 states. [2020-10-27 14:53:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:00,489 INFO L93 Difference]: Finished difference Result 457 states and 462 transitions. [2020-10-27 14:53:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 14:53:00,490 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-10-27 14:53:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:00,492 INFO L225 Difference]: With dead ends: 457 [2020-10-27 14:53:00,492 INFO L226 Difference]: Without dead ends: 384 [2020-10-27 14:53:00,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:53:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-27 14:53:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 128. [2020-10-27 14:53:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:53:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-27 14:53:00,529 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 121 [2020-10-27 14:53:00,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:00,529 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-27 14:53:00,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:53:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-27 14:53:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:53:00,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:00,530 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:00,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:53:00,530 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash 811055386, now seen corresponding path program 23 times [2020-10-27 14:53:00,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:00,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136611177] [2020-10-27 14:53:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:00,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:04,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 14:53:30,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:53:30,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29711 [2020-10-27 14:53:30,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:53:30,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:53:30,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:53:30,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:30,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:30,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:30,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:30,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:30,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 14:53:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:30,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:30,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:30,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:53:30,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:30,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:53:30,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:30,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-27 14:53:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:30,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:30,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:30,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:30,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:53:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:30,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 4 proven. 529 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2020-10-27 14:53:30,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136611177] [2020-10-27 14:53:30,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:30,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:53:30,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758421417] [2020-10-27 14:53:30,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:53:30,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:30,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:53:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:53:30,846 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 27 states. [2020-10-27 14:53:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:33,860 INFO L93 Difference]: Finished difference Result 475 states and 480 transitions. [2020-10-27 14:53:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 14:53:33,861 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2020-10-27 14:53:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:33,863 INFO L225 Difference]: With dead ends: 475 [2020-10-27 14:53:33,863 INFO L226 Difference]: Without dead ends: 400 [2020-10-27 14:53:33,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:53:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-27 14:53:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 132. [2020-10-27 14:53:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:53:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-10-27 14:53:33,895 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 125 [2020-10-27 14:53:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:33,895 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-10-27 14:53:33,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:53:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-10-27 14:53:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 14:53:33,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:33,897 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:33,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:53:33,897 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:33,898 INFO L82 PathProgramCache]: Analyzing trace with hash -283901930, now seen corresponding path program 24 times [2020-10-27 14:53:33,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:33,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293453799] [2020-10-27 14:53:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:34,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:34,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:39,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:39,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 14:53:39,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:39,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-27 14:53:39,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:53:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:53:39,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:53:39,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:39,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:39,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:39,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:39,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:39,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:39,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:39,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:39,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:39,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:39,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-27 14:53:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:39,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:39,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:39,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:39,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:39,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:53:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:39,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:39,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-27 14:53:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:39,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:39,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:39,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:39,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:39,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:39,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:39,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:39,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:53:39,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:39,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 4 proven. 576 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-27 14:53:39,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293453799] [2020-10-27 14:53:39,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:39,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:53:39,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833801855] [2020-10-27 14:53:39,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:53:39,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:53:39,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:53:39,657 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 28 states. [2020-10-27 14:53:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:43,024 INFO L93 Difference]: Finished difference Result 493 states and 498 transitions. [2020-10-27 14:53:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 14:53:43,025 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 129 [2020-10-27 14:53:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:43,027 INFO L225 Difference]: With dead ends: 493 [2020-10-27 14:53:43,027 INFO L226 Difference]: Without dead ends: 416 [2020-10-27 14:53:43,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 14:53:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-27 14:53:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 136. [2020-10-27 14:53:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 14:53:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2020-10-27 14:53:43,080 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 129 [2020-10-27 14:53:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:43,080 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2020-10-27 14:53:43,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:53:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2020-10-27 14:53:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 14:53:43,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:43,083 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:43,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:53:43,083 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash 715479314, now seen corresponding path program 25 times [2020-10-27 14:53:43,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:43,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452319885] [2020-10-27 14:53:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:43,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:43,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking...