/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-fpi/brs4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:35:30,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:35:30,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:35:30,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:35:30,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:35:30,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:35:30,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:35:30,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:35:30,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:35:30,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:35:30,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:35:30,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:35:30,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:35:30,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:35:30,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:35:30,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:35:30,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:35:30,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:35:30,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:35:30,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:35:30,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:35:30,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:35:30,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:35:30,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:35:30,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:35:30,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:35:30,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:35:30,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:35:30,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:35:30,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:35:30,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:35:30,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:35:30,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:35:30,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:35:30,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:35:30,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:35:30,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:35:30,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:35:30,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:35:30,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:35:30,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:35:30,442 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 14:35:30,485 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:35:30,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:35:30,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:35:30,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:35:30,487 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:35:30,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:35:30,488 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:35:30,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:35:30,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:35:30,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:35:30,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:35:30,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:35:30,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:35:30,489 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:35:30,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:35:30,490 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:35:30,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:35:30,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:35:30,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:35:30,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:35:30,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:35:30,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:35:30,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:35:30,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:35:30,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:35:30,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:35:30,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:35:30,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:35:30,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:35:30,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:35:30,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:35:30,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:35:30,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:35:30,899 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:35:30,900 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:35:30,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4.c [2020-10-27 14:35:30,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/434d63e42/4b850706df5947dfa139eb1820078fe1/FLAGd53592749 [2020-10-27 14:35:31,552 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:35:31,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4.c [2020-10-27 14:35:31,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/434d63e42/4b850706df5947dfa139eb1820078fe1/FLAGd53592749 [2020-10-27 14:35:31,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/434d63e42/4b850706df5947dfa139eb1820078fe1 [2020-10-27 14:35:31,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:35:31,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:35:31,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:35:31,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:35:31,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:35:31,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:35:31" (1/1) ... [2020-10-27 14:35:31,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aef55e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:31, skipping insertion in model container [2020-10-27 14:35:31,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:35:31" (1/1) ... [2020-10-27 14:35:31,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:35:31,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:35:32,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:35:32,190 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:35:32,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:35:32,230 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:35:32,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32 WrapperNode [2020-10-27 14:35:32,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:35:32,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:35:32,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:35:32,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:35:32,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32" (1/1) ... [2020-10-27 14:35:32,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32" (1/1) ... [2020-10-27 14:35:32,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32" (1/1) ... [2020-10-27 14:35:32,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32" (1/1) ... [2020-10-27 14:35:32,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32" (1/1) ... [2020-10-27 14:35:32,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32" (1/1) ... [2020-10-27 14:35:32,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32" (1/1) ... [2020-10-27 14:35:32,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:35:32,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:35:32,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:35:32,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:35:32,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32" (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 14:35:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:35:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:35:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:35:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:35:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:35:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:35:32,340 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:35:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:35:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:35:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:35:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:35:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:35:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:35:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:35:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:35:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:35:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:35:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:35:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:35:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:35:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:35:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:35:32,678 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:35:32,679 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:35:32,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:35:32 BoogieIcfgContainer [2020-10-27 14:35:32,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:35:32,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:35:32,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:35:32,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:35:32,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:35:31" (1/3) ... [2020-10-27 14:35:32,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e79760d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:35:32, skipping insertion in model container [2020-10-27 14:35:32,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:35:32" (2/3) ... [2020-10-27 14:35:32,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e79760d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:35:32, skipping insertion in model container [2020-10-27 14:35:32,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:35:32" (3/3) ... [2020-10-27 14:35:32,690 INFO L111 eAbstractionObserver]: Analyzing ICFG brs4.c [2020-10-27 14:35:32,704 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:35:32,709 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:35:32,747 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:35:32,780 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:35:32,780 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:35:32,780 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:35:32,780 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:35:32,780 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:35:32,780 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:35:32,781 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:35:32,781 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:35:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 14:35:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:35:32,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:32,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:32,814 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:32,828 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-27 14:35:32,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:32,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798653891] [2020-10-27 14:35:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:33,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:33,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:35:33,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:33,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-27 14:35:33,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:35:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:33,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:35:33,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:33,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:33,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:33,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 14:35:33,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:33,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:33,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:35:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:33,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:33,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:35:33,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:33,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:35:33,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:33,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:35:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:33,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:33,551 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 14:35:33,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798653891] [2020-10-27 14:35:33,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:35:33,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:35:33,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663544277] [2020-10-27 14:35:33,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:35:33,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:33,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:35:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:35:33,579 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 14:35:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:33,679 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-27 14:35:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:35:33,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-27 14:35:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:33,689 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:35:33,689 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 14:35:33,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:35:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 14:35:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 14:35:33,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:35:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-27 14:35:33,735 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-27 14:35:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:33,736 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-27 14:35:33,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:35:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-27 14:35:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:35:33,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:33,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:33,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:35:33,738 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:33,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:33,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-27 14:35:33,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:33,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375728568] [2020-10-27 14:35:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:33,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:34,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:34,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:35:34,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:34,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 14:35:34,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:35:34,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:35:34,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:35:34,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:34,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:34,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:34,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:34,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:34,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:34,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:35:34,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:34,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:35:34,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:35:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:34,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:34,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:35:34,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:34,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:35:34,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:35:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:34,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:35:34,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:34,251 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 14:35:34,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375728568] [2020-10-27 14:35:34,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:35:34,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:35:34,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566372724] [2020-10-27 14:35:34,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:35:34,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:35:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:35:34,256 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-27 14:35:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:34,407 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-27 14:35:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:35:34,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 14:35:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:34,409 INFO L225 Difference]: With dead ends: 40 [2020-10-27 14:35:34,410 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:35:34,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:35:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:35:34,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 14:35:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:35:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 14:35:34,420 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2020-10-27 14:35:34,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:34,421 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 14:35:34,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:35:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 14:35:34,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:35:34,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:34,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:34,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:35:34,426 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1214934215, now seen corresponding path program 1 times [2020-10-27 14:35:34,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:34,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644734790] [2020-10-27 14:35:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:34,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:34,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:35,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:35,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:35:35,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:35,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-27 14:35:35,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:35,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:35:35,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:35:35,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:35:35,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:35,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:35,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:35,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:35,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:35,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:35,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:35:35,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:35,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:35,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:35,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:35,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:35,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:35:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:35,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:35,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:35,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:35:35,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:35,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:35:35,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:35,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:35,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:35,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:35,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:35:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644734790] [2020-10-27 14:35:35,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:35:35,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:35:35,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977661539] [2020-10-27 14:35:35,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:35:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:35,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:35:35,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:35:35,376 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 4 states. [2020-10-27 14:35:35,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:35,461 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-27 14:35:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:35:35,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 14:35:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:35,463 INFO L225 Difference]: With dead ends: 48 [2020-10-27 14:35:35,463 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 14:35:35,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:35:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 14:35:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-27 14:35:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:35:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-27 14:35:35,471 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2020-10-27 14:35:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:35,472 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-27 14:35:35,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:35:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-27 14:35:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:35:35,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:35,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:35,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:35:35,474 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:35,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-27 14:35:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:35,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556010073] [2020-10-27 14:35:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:35,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:35,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:35,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:36,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:36,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:35:36,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:36,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-27 14:35:36,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:36,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:35:36,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:35:36,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:35:36,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:36,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:36,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:36,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:36,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:36,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:36,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:35:36,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:36,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:36,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:36,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:36,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:36,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:35:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:36,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:36,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:36,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:35:36,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:36,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:35:36,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:36,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:36,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:35:36,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556010073] [2020-10-27 14:35:36,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:35:36,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 14:35:36,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994162977] [2020-10-27 14:35:36,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:35:36,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:36,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:35:36,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:35:36,179 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states. [2020-10-27 14:35:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:36,415 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-27 14:35:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:35:36,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-27 14:35:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:36,417 INFO L225 Difference]: With dead ends: 41 [2020-10-27 14:35:36,417 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:35:36,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:35:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:35:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 14:35:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:35:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-27 14:35:36,425 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2020-10-27 14:35:36,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:36,425 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-27 14:35:36,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:35:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-27 14:35:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:35:36,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:36,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:36,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:35:36,427 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:36,427 INFO L82 PathProgramCache]: Analyzing trace with hash 427046459, now seen corresponding path program 1 times [2020-10-27 14:35:36,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:36,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089247191] [2020-10-27 14:35:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:36,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:36,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:36,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:36,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:36,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:36,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:37,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:37,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:37,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:37,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:38,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:38,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:35:38,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:35:38,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-27 14:35:38,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:38,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:35:38,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:35:38,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:35:38,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:39,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:39,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:39,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:39,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:39,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:39,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:35:39,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:39,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:39,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:39,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:39,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:39,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:35:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:39,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:39,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:39,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:35:39,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:39,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:35:39,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:39,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:35:39,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089247191] [2020-10-27 14:35:39,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:39,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:35:39,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867311784] [2020-10-27 14:35:39,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:35:39,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:39,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:35:39,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:35:39,045 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-10-27 14:35:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:39,720 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-27 14:35:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:35:39,721 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:35:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:39,724 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:35:39,724 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:35:39,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:35:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:35:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-10-27 14:35:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 14:35:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-27 14:35:39,735 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 31 [2020-10-27 14:35:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:39,736 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-27 14:35:39,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:35:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-27 14:35:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 14:35:39,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:39,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:39,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:35:39,737 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1548936887, now seen corresponding path program 2 times [2020-10-27 14:35:39,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:39,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356730493] [2020-10-27 14:35:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:39,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:39,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:39,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:39,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:40,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:40,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:40,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:40,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:40,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:41,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:41,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:41,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:41,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:41,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:42,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:44,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:44,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 14:35:44,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:35:44,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:35:44,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:44,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:35:44,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:35:44,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:35:44,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:44,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:44,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:44,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:44,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:44,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:44,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:35:44,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:44,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:44,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:44,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:44,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:44,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:35:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:44,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:44,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:44,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:35:44,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:44,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:35:44,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:44,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:35:45,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356730493] [2020-10-27 14:35:45,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:45,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:35:45,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531652260] [2020-10-27 14:35:45,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:35:45,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:35:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:35:45,006 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 12 states. [2020-10-27 14:35:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:45,748 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-27 14:35:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:35:45,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-27 14:35:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:45,750 INFO L225 Difference]: With dead ends: 74 [2020-10-27 14:35:45,750 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:35:45,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:35:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:35:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2020-10-27 14:35:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:35:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-27 14:35:45,760 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 34 [2020-10-27 14:35:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:45,760 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-27 14:35:45,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:35:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-27 14:35:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 14:35:45,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:45,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:45,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:35:45,762 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:45,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914284, now seen corresponding path program 1 times [2020-10-27 14:35:45,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:45,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766191348] [2020-10-27 14:35:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:45,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:45,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:46,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:46,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:46,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:46,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:47,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:47,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:47,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:47,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:47,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:47,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:48,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:48,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:48,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:48,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:48,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:50,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:50,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 14:35:50,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 14:35:50,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:35:50,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:35:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:35:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:35:50,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:51,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:51,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:51,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:51,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:51,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:51,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:35:51,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:51,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:51,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:51,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:51,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:51,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:35:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:51,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:51,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:51,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:35:51,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:51,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:35:51,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:51,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:51,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:51,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:51,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:35:51,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766191348] [2020-10-27 14:35:51,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:51,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:35:51,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176138153] [2020-10-27 14:35:51,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:35:51,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:51,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:35:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:35:51,211 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 16 states. [2020-10-27 14:35:51,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:51,845 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-27 14:35:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:35:51,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-27 14:35:51,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:51,848 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:35:51,848 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:35:51,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:35:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:35:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-27 14:35:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 14:35:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-27 14:35:51,868 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 34 [2020-10-27 14:35:51,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:51,870 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-27 14:35:51,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:35:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-27 14:35:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:35:51,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:51,872 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:51,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:35:51,873 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:51,876 INFO L82 PathProgramCache]: Analyzing trace with hash 351179963, now seen corresponding path program 3 times [2020-10-27 14:35:51,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:51,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989082342] [2020-10-27 14:35:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:51,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:51,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:51,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:52,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:52,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:52,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:52,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:52,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:52,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:52,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:53,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:53,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:53,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:53,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:53,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:54,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:54,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:54,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:54,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:54,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:54,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:54,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:55,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:55,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:56,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:56,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:35:56,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 14:35:56,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:35:56,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:35:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:35:56,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:35:56,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:57,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:57,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:57,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:57,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:57,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:35:57,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:57,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:57,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:35:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:57,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:57,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:57,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:35:57,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:57,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:35:57,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:57,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:35:57,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989082342] [2020-10-27 14:35:57,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:57,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:35:57,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627914045] [2020-10-27 14:35:57,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:35:57,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:57,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:35:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:35:57,176 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 13 states. [2020-10-27 14:35:57,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:57,890 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-10-27 14:35:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:35:57,891 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-27 14:35:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:57,892 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:35:57,892 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:35:57,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:35:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:35:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2020-10-27 14:35:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:35:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-27 14:35:57,902 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 37 [2020-10-27 14:35:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:57,903 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-27 14:35:57,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:35:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-27 14:35:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:35:57,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:57,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:57,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:35:57,904 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1090575102, now seen corresponding path program 2 times [2020-10-27 14:35:57,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:57,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321921200] [2020-10-27 14:35:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:57,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:59,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:59,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:00,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:01,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:01,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:01,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:01,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:01,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:02,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:02,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:36:02,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 14:36:02,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:36:02,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:02,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:36:02,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:36:02,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:36:02,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:03,395 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-27 14:36:03,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:03,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:03,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:03,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:03,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:03,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:36:03,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:03,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:03,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:03,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:03,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:03,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:36:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:03,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:03,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:03,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:36:03,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:03,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:36:03,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:03,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:36:03,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321921200] [2020-10-27 14:36:03,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:03,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:36:03,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739818663] [2020-10-27 14:36:03,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:36:03,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:36:03,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:36:03,972 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 20 states. [2020-10-27 14:36:05,008 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 14:36:05,342 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 14:36:05,892 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-27 14:36:06,076 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-27 14:36:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:06,268 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-10-27 14:36:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:36:06,269 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-27 14:36:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:06,271 INFO L225 Difference]: With dead ends: 81 [2020-10-27 14:36:06,271 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 14:36:06,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:36:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 14:36:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-10-27 14:36:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:36:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-10-27 14:36:06,284 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2020-10-27 14:36:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:06,284 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-10-27 14:36:06,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:36:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-10-27 14:36:06,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:36:06,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:06,285 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:06,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:36:06,286 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:06,286 INFO L82 PathProgramCache]: Analyzing trace with hash 562952247, now seen corresponding path program 4 times [2020-10-27 14:36:06,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:06,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358160793] [2020-10-27 14:36:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:06,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:06,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:06,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:06,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:06,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:06,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:07,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:07,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:07,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:07,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:07,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:07,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:07,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:08,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:08,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:08,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:09,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:09,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:09,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:09,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:09,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:09,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:11,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:11,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:36:11,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 14:36:11,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:36:11,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:36:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:36:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:36:11,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:36:11,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:11,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:11,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:11,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:11,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:11,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:36:11,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:11,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:11,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:11,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:36:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:11,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:11,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:11,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:36:11,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:11,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:36:11,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:11,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 14:36:11,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358160793] [2020-10-27 14:36:11,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:11,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:36:11,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988090660] [2020-10-27 14:36:11,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:36:11,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:11,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:36:11,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:36:11,506 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 10 states. [2020-10-27 14:36:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:11,766 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-10-27 14:36:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:36:11,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 14:36:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:11,767 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:36:11,767 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 14:36:11,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:36:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 14:36:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2020-10-27 14:36:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:36:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-10-27 14:36:11,789 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 40 [2020-10-27 14:36:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:11,790 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-10-27 14:36:11,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:36:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-10-27 14:36:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:36:11,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:11,794 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:11,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:36:11,794 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:11,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:11,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1003722988, now seen corresponding path program 3 times [2020-10-27 14:36:11,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:11,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349882303] [2020-10-27 14:36:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:11,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:11,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:11,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:11,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:12,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:12,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:12,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:12,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:12,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:12,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:12,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:13,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:13,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:13,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:13,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:13,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:13,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:13,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:13,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:14,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:14,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:14,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:15,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:16,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:16,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:16,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:36:16,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 14:36:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:36:16,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:36:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:36:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:36:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:17,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:17,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:17,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:17,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:17,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:17,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:36:17,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:17,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:17,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:17,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:17,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:17,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:36:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:17,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:17,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:36:17,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:17,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:36:17,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:17,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:36:17,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349882303] [2020-10-27 14:36:17,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:17,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:36:17,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911192271] [2020-10-27 14:36:17,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:36:17,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:17,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:36:17,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:36:17,098 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 14 states. [2020-10-27 14:36:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:18,774 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-10-27 14:36:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:36:18,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-27 14:36:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:18,776 INFO L225 Difference]: With dead ends: 157 [2020-10-27 14:36:18,776 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 14:36:18,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:36:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 14:36:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 83. [2020-10-27 14:36:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:36:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-10-27 14:36:18,808 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 40 [2020-10-27 14:36:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:18,809 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-10-27 14:36:18,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:36:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2020-10-27 14:36:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:36:18,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:18,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:18,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:36:18,811 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:18,811 INFO L82 PathProgramCache]: Analyzing trace with hash -264327849, now seen corresponding path program 4 times [2020-10-27 14:36:18,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:18,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815871196] [2020-10-27 14:36:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:18,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:18,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:19,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:19,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:19,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:19,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:19,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:19,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:20,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:20,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:20,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:20,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:20,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:20,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:20,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:21,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:21,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:22,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:22,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:22,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:22,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:23,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:23,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:23,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:23,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:23,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:23,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:23,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:36:23,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 14:36:23,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:36:23,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:36:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:36:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:36:23,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:24,311 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2020-10-27 14:36:24,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:24,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:24,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:24,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:24,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:24,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:24,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:24,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:24,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:36:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:24,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:24,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:24,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:36:24,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:24,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:36:24,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:24,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:24,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:36:24,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815871196] [2020-10-27 14:36:24,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:24,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:36:24,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756300230] [2020-10-27 14:36:24,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:36:24,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:24,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:36:24,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:36:24,673 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 20 states. [2020-10-27 14:36:25,448 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-27 14:36:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:26,589 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2020-10-27 14:36:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:36:26,590 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-27 14:36:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:26,591 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:36:26,591 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:36:26,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:36:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:36:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-27 14:36:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 14:36:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2020-10-27 14:36:26,606 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 40 [2020-10-27 14:36:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:26,606 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2020-10-27 14:36:26,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:36:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2020-10-27 14:36:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:36:26,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:26,607 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:26,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:36:26,607 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:26,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:26,608 INFO L82 PathProgramCache]: Analyzing trace with hash 751786814, now seen corresponding path program 5 times [2020-10-27 14:36:26,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:26,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773296727] [2020-10-27 14:36:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:26,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:26,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:26,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:26,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:26,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:26,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:26,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:26,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:27,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:28,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:28,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:29,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:29,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:29,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:29,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:30,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:30,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:30,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:30,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:31,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:31,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:36:31,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-27 14:36:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:36:31,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:36:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:36:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:36:31,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:31,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:31,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:31,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:31,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:31,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:31,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:31,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:31,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:31,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:31,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:31,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:36:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:31,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:31,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:31,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:36:31,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:31,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:36:31,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:31,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:31,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:31,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:31,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:36:31,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773296727] [2020-10-27 14:36:31,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:31,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:36:31,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145837242] [2020-10-27 14:36:31,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:36:31,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:36:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:36:31,949 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 15 states. [2020-10-27 14:36:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:33,794 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2020-10-27 14:36:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:36:33,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-27 14:36:33,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:33,796 INFO L225 Difference]: With dead ends: 153 [2020-10-27 14:36:33,796 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 14:36:33,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=356, Invalid=1366, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:36:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 14:36:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 112. [2020-10-27 14:36:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 14:36:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 142 transitions. [2020-10-27 14:36:33,815 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 142 transitions. Word has length 43 [2020-10-27 14:36:33,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:33,817 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 142 transitions. [2020-10-27 14:36:33,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:36:33,817 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 142 transitions. [2020-10-27 14:36:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:36:33,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:33,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:33,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:36:33,818 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash -814888421, now seen corresponding path program 6 times [2020-10-27 14:36:33,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:33,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654842738] [2020-10-27 14:36:33,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:33,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:33,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:33,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:34,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:34,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:34,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:34,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:34,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:37,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:38,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:38,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:36:38,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:36:38,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:36:38,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:38,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:36:38,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:36:38,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:36:38,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:39,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:39,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:39,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:39,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:39,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:39,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:39,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:39,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:39,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:39,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:39,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:39,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:36:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:39,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:39,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:39,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:36:39,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:39,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:36:39,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:39,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:39,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:39,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:39,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:36:39,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654842738] [2020-10-27 14:36:39,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:39,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:36:39,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534255454] [2020-10-27 14:36:39,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:36:39,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:39,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:36:39,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:36:39,188 INFO L87 Difference]: Start difference. First operand 112 states and 142 transitions. Second operand 15 states. [2020-10-27 14:36:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:41,436 INFO L93 Difference]: Finished difference Result 292 states and 369 transitions. [2020-10-27 14:36:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:36:41,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-27 14:36:41,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:41,441 INFO L225 Difference]: With dead ends: 292 [2020-10-27 14:36:41,441 INFO L226 Difference]: Without dead ends: 285 [2020-10-27 14:36:41,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:36:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-27 14:36:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 144. [2020-10-27 14:36:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 14:36:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2020-10-27 14:36:41,462 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 43 [2020-10-27 14:36:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:41,463 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2020-10-27 14:36:41,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:36:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2020-10-27 14:36:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 14:36:41,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:41,464 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:41,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:36:41,464 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:41,465 INFO L82 PathProgramCache]: Analyzing trace with hash -672465196, now seen corresponding path program 7 times [2020-10-27 14:36:41,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:41,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416567872] [2020-10-27 14:36:41,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:41,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:41,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:41,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:41,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:41,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:41,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:41,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:43,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:43,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:44,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:44,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:44,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:46,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:46,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:46,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:36:46,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 14:36:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:36:46,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:36:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:36:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:36:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:46,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:46,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:46,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:46,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:46,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:46,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:46,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:46,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:46,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:36:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:46,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:46,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:46,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:36:46,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:46,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:36:46,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:46,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:46,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:46,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:46,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:36:46,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416567872] [2020-10-27 14:36:46,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:46,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:36:46,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823967357] [2020-10-27 14:36:46,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:36:46,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:46,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:36:46,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:36:46,755 INFO L87 Difference]: Start difference. First operand 144 states and 186 transitions. Second operand 15 states. [2020-10-27 14:36:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:47,441 INFO L93 Difference]: Finished difference Result 267 states and 342 transitions. [2020-10-27 14:36:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:36:47,441 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-27 14:36:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:47,443 INFO L225 Difference]: With dead ends: 267 [2020-10-27 14:36:47,443 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 14:36:47,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:36:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 14:36:47,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 170. [2020-10-27 14:36:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-27 14:36:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 219 transitions. [2020-10-27 14:36:47,465 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 219 transitions. Word has length 46 [2020-10-27 14:36:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:47,465 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 219 transitions. [2020-10-27 14:36:47,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:36:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 219 transitions. [2020-10-27 14:36:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 14:36:47,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:47,466 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:47,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:36:47,467 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash -930630634, now seen corresponding path program 8 times [2020-10-27 14:36:47,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:47,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580984774] [2020-10-27 14:36:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:47,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:47,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:47,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:47,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:48,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:48,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:50,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:51,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:51,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:51,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:51,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:51,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:52,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:52,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:36:52,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 14:36:52,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:36:52,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:36:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:36:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:36:52,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:52,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:52,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:52,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:52,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:52,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:52,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:36:52,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:52,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:52,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:52,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:52,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:52,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:36:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:52,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:52,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:36:52,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:52,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:36:52,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:52,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:52,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:52,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:52,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:36:52,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580984774] [2020-10-27 14:36:52,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:52,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:36:52,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126163529] [2020-10-27 14:36:52,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:36:52,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:36:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:36:52,615 INFO L87 Difference]: Start difference. First operand 170 states and 219 transitions. Second operand 11 states. [2020-10-27 14:36:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:53,054 INFO L93 Difference]: Finished difference Result 277 states and 357 transitions. [2020-10-27 14:36:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:36:53,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-27 14:36:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:53,056 INFO L225 Difference]: With dead ends: 277 [2020-10-27 14:36:53,056 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 14:36:53,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:36:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 14:36:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 70. [2020-10-27 14:36:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:36:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-10-27 14:36:53,070 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 46 [2020-10-27 14:36:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:53,070 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-10-27 14:36:53,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:36:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-10-27 14:36:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 14:36:53,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:53,071 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:53,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:36:53,071 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:53,071 INFO L82 PathProgramCache]: Analyzing trace with hash -84785449, now seen corresponding path program 9 times [2020-10-27 14:36:53,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:53,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638911147] [2020-10-27 14:36:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:53,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:53,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:54,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:54,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:54,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:58,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:58,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:36:58,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-27 14:36:58,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:36:58,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:36:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:36:58,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:36:58,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:58,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:58,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:58,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:58,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:58,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:58,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:58,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:58,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:58,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:58,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:58,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:58,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:36:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:58,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:58,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:58,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:36:58,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:36:58,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 14:36:58,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638911147] [2020-10-27 14:36:58,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:58,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:36:58,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180370313] [2020-10-27 14:36:58,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:36:58,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:36:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:36:58,467 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 14 states. [2020-10-27 14:36:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:59,274 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2020-10-27 14:36:59,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:36:59,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-27 14:36:59,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:59,276 INFO L225 Difference]: With dead ends: 134 [2020-10-27 14:36:59,277 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 14:36:59,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:36:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 14:36:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 81. [2020-10-27 14:36:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:36:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-10-27 14:36:59,295 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 46 [2020-10-27 14:36:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:59,296 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-10-27 14:36:59,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:36:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-10-27 14:36:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 14:36:59,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:59,297 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:59,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:36:59,297 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:59,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1651460684, now seen corresponding path program 10 times [2020-10-27 14:36:59,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:59,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731797282] [2020-10-27 14:36:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:59,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:59,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:59,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:00,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:00,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:01,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:02,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:02,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:02,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:04,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:04,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:37:04,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:37:04,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:37:04,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:37:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:37:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:37:04,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:05,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:05,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:05,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:05,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:05,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:05,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:05,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:05,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:05,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:37:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:05,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:05,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:05,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:37:05,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:05,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:37:05,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:05,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:37:05,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731797282] [2020-10-27 14:37:05,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:05,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:37:05,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386589540] [2020-10-27 14:37:05,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:37:05,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:05,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:37:05,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:37:05,538 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 25 states. [2020-10-27 14:37:08,847 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-27 14:37:09,033 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2020-10-27 14:37:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:09,255 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2020-10-27 14:37:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:37:09,256 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-27 14:37:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:09,257 INFO L225 Difference]: With dead ends: 173 [2020-10-27 14:37:09,258 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 14:37:09,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=401, Invalid=2791, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:37:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 14:37:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-10-27 14:37:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 14:37:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-27 14:37:09,277 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 46 [2020-10-27 14:37:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:09,277 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-27 14:37:09,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:37:09,278 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-27 14:37:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:37:09,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:09,278 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:09,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:37:09,279 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:09,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:09,279 INFO L82 PathProgramCache]: Analyzing trace with hash 698466459, now seen corresponding path program 11 times [2020-10-27 14:37:09,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:09,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604842513] [2020-10-27 14:37:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:09,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:09,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:09,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:09,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:09,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:09,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:10,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:10,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:11,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:11,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:11,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:11,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:11,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:12,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:12,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:12,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:12,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:12,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:12,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:12,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:13,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:13,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:13,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:14,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:14,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:14,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:37:14,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-27 14:37:14,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:37:14,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:37:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:37:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:37:14,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:14,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:14,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:14,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:14,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:14,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:14,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:37:14,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:14,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:14,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:37:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:14,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:14,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:37:14,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:14,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:37:14,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:14,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:14,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:14,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:14,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:37:14,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604842513] [2020-10-27 14:37:14,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:14,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:37:14,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276412279] [2020-10-27 14:37:14,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:37:14,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:37:14,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:37:14,812 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 16 states. [2020-10-27 14:37:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:16,389 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-27 14:37:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:37:16,390 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 14:37:16,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:16,391 INFO L225 Difference]: With dead ends: 114 [2020-10-27 14:37:16,391 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 14:37:16,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:37:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 14:37:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2020-10-27 14:37:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 14:37:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-10-27 14:37:16,410 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 49 [2020-10-27 14:37:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:16,410 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-10-27 14:37:16,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:37:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-10-27 14:37:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:37:16,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:16,411 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:16,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:37:16,411 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:16,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:16,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1224106592, now seen corresponding path program 12 times [2020-10-27 14:37:16,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:16,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605507321] [2020-10-27 14:37:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:16,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:16,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:16,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:16,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:16,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:17,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:17,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:17,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:17,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:17,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:17,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:19,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:19,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:19,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:21,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:21,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:37:21,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:37:21,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:37:21,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:21,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:37:21,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:37:21,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:37:21,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:21,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:21,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:21,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:21,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:21,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:21,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:37:21,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:21,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:21,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:37:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:21,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:21,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:21,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:37:21,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:37:21,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:37:21,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605507321] [2020-10-27 14:37:21,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:21,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:37:21,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090180040] [2020-10-27 14:37:21,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:37:21,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:21,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:37:21,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:37:21,767 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 17 states. [2020-10-27 14:37:25,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:25,643 INFO L93 Difference]: Finished difference Result 189 states and 211 transitions. [2020-10-27 14:37:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:37:25,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-27 14:37:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:25,644 INFO L225 Difference]: With dead ends: 189 [2020-10-27 14:37:25,644 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 14:37:25,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=266, Invalid=1373, Unknown=1, NotChecked=0, Total=1640 [2020-10-27 14:37:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 14:37:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-10-27 14:37:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 14:37:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2020-10-27 14:37:25,678 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 49 [2020-10-27 14:37:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:25,678 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2020-10-27 14:37:25,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:37:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2020-10-27 14:37:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:37:25,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:25,679 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:25,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:37:25,679 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:25,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1261481, now seen corresponding path program 13 times [2020-10-27 14:37:25,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:25,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181736652] [2020-10-27 14:37:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:25,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:25,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:25,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:25,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:25,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:26,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:26,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:26,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:26,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:26,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:26,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:26,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:27,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:27,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:27,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:27,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:28,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:28,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:28,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:28,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:30,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:30,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:30,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:30,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:30,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:30,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:37:30,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 14:37:30,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:37:30,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:37:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:37:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:37:30,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:31,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:31,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:31,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:31,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:31,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:31,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:37:31,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:31,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:31,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:31,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:37:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:31,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:31,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:31,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:37:31,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:31,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:37:31,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:31,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:31,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:31,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:31,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:37:31,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181736652] [2020-10-27 14:37:31,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:31,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:37:31,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374647148] [2020-10-27 14:37:31,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:37:31,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:31,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:37:31,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:37:31,190 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 19 states. [2020-10-27 14:37:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:32,072 INFO L93 Difference]: Finished difference Result 174 states and 191 transitions. [2020-10-27 14:37:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:37:32,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-27 14:37:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:32,073 INFO L225 Difference]: With dead ends: 174 [2020-10-27 14:37:32,074 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 14:37:32,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:37:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 14:37:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 14:37:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 14:37:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2020-10-27 14:37:32,110 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 52 [2020-10-27 14:37:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:32,110 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2020-10-27 14:37:32,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:37:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2020-10-27 14:37:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:37:32,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:32,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:32,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:37:32,115 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:32,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1805023033, now seen corresponding path program 14 times [2020-10-27 14:37:32,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:32,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006514753] [2020-10-27 14:37:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:32,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:32,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:33,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:33,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:34,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:34,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:34,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:35,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:35,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:36,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:36,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:36,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:37,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:37,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:37:37,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:37:37,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:37:37,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:37,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:37:37,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:37:37,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:37:37,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:38,207 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-27 14:37:38,571 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-27 14:37:38,864 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-27 14:37:39,350 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 57 [2020-10-27 14:37:39,659 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2020-10-27 14:37:39,984 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-27 14:37:40,159 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-27 14:37:40,400 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-10-27 14:37:40,622 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-10-27 14:37:41,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:41,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:41,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:41,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:41,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:41,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:37:41,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:41,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:41,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:41,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:41,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:41,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:37:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:41,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:41,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:41,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:37:41,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:41,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:37:41,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:41,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:37:41,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006514753] [2020-10-27 14:37:41,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:41,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:37:41,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600228311] [2020-10-27 14:37:41,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:37:41,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:41,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:37:41,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:37:41,080 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand 28 states. [2020-10-27 14:37:42,642 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 75 [2020-10-27 14:37:42,983 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-27 14:37:43,726 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 113 [2020-10-27 14:37:44,505 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 57 [2020-10-27 14:37:44,802 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 14:37:45,179 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 62 [2020-10-27 14:37:45,838 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2020-10-27 14:37:46,121 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 56 [2020-10-27 14:37:46,488 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 52 [2020-10-27 14:37:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:46,659 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2020-10-27 14:37:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:37:46,663 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2020-10-27 14:37:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:46,664 INFO L225 Difference]: With dead ends: 132 [2020-10-27 14:37:46,664 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 14:37:46,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=273, Invalid=2277, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:37:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 14:37:46,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2020-10-27 14:37:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 14:37:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2020-10-27 14:37:46,699 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 52 [2020-10-27 14:37:46,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:46,699 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2020-10-27 14:37:46,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:37:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2020-10-27 14:37:46,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:37:46,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:46,700 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:46,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:37:46,701 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:46,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1657196766, now seen corresponding path program 15 times [2020-10-27 14:37:46,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:46,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190619050] [2020-10-27 14:37:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:46,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:46,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:46,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:47,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:48,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:48,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:48,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:49,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:49,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:49,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:49,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:49,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:49,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:49,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:49,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:50,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:50,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:51,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:51,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:51,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:37:51,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 14:37:51,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:37:51,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:37:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:37:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:37:51,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:52,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:52,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:52,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:52,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:52,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:52,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:52,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:52,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:52,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:52,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:52,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:52,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:37:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:52,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:52,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:52,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:37:52,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:52,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:52,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:52,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:52,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:37:52,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190619050] [2020-10-27 14:37:52,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:52,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:37:52,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518937825] [2020-10-27 14:37:52,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:37:52,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:52,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:37:52,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:37:52,514 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand 19 states. [2020-10-27 14:37:53,099 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-27 14:37:54,916 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-27 14:37:55,518 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 14:37:57,947 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-27 14:37:58,969 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-27 14:37:59,703 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 14:38:00,362 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-27 14:38:01,429 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-27 14:38:06,092 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 14:38:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:06,214 INFO L93 Difference]: Finished difference Result 174 states and 189 transitions. [2020-10-27 14:38:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:38:06,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-10-27 14:38:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:06,217 INFO L225 Difference]: With dead ends: 174 [2020-10-27 14:38:06,217 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 14:38:06,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=343, Invalid=2008, Unknown=1, NotChecked=0, Total=2352 [2020-10-27 14:38:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 14:38:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 146. [2020-10-27 14:38:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 14:38:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2020-10-27 14:38:06,266 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 55 [2020-10-27 14:38:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:06,267 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2020-10-27 14:38:06,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:38:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2020-10-27 14:38:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:38:06,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:06,268 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:06,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:38:06,268 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash 795956, now seen corresponding path program 16 times [2020-10-27 14:38:06,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:06,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058038460] [2020-10-27 14:38:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:06,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:07,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:07,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:07,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:07,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:07,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:08,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:08,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:08,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:08,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:08,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:08,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:11,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:11,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:11,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:38:11,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 14:38:11,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:38:11,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:38:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:38:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:38:11,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:11,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:11,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:11,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:11,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:11,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:38:11,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:11,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:11,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:11,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:11,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:11,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:11,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:11,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:11,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:11,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:11,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:38:11,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:11,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 13 proven. 98 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:38:11,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058038460] [2020-10-27 14:38:11,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:11,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:38:11,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684719044] [2020-10-27 14:38:11,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:38:11,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:11,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:38:11,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:38:11,923 INFO L87 Difference]: Start difference. First operand 146 states and 158 transitions. Second operand 22 states. [2020-10-27 14:38:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:13,081 INFO L93 Difference]: Finished difference Result 207 states and 226 transitions. [2020-10-27 14:38:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:38:13,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-27 14:38:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:13,083 INFO L225 Difference]: With dead ends: 207 [2020-10-27 14:38:13,083 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 14:38:13,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:38:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 14:38:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2020-10-27 14:38:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 14:38:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2020-10-27 14:38:13,129 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 58 [2020-10-27 14:38:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:13,129 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2020-10-27 14:38:13,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:38:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2020-10-27 14:38:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:38:13,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:13,130 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:13,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:38:13,131 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:13,131 INFO L82 PathProgramCache]: Analyzing trace with hash 488944726, now seen corresponding path program 17 times [2020-10-27 14:38:13,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:13,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325079511] [2020-10-27 14:38:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:13,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:16,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:17,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:17,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:18,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:18,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:38:18,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:38:18,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:38:18,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:38:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:38:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:38:18,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:19,820 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2020-10-27 14:38:20,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:20,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:20,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:20,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:20,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:20,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:38:20,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:20,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:20,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:20,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:20,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:20,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:20,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:20,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:20,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:20,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:20,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:38:20,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:20,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:20,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:20,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:20,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:20,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325079511] [2020-10-27 14:38:20,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:20,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:38:20,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944510553] [2020-10-27 14:38:20,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:38:20,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:20,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:38:20,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:38:20,790 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand 29 states. [2020-10-27 14:38:23,136 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-27 14:38:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:23,622 INFO L93 Difference]: Finished difference Result 323 states and 353 transitions. [2020-10-27 14:38:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:38:23,622 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-27 14:38:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:23,623 INFO L225 Difference]: With dead ends: 323 [2020-10-27 14:38:23,623 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 14:38:23,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:38:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 14:38:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 129. [2020-10-27 14:38:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 14:38:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2020-10-27 14:38:23,658 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 58 [2020-10-27 14:38:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:23,659 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2020-10-27 14:38:23,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:38:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2020-10-27 14:38:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:38:23,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:23,660 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:23,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:38:23,660 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash -757992199, now seen corresponding path program 18 times [2020-10-27 14:38:23,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:23,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196778045] [2020-10-27 14:38:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:23,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:23,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:23,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:25,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:25,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:25,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:28,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:28,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:28,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:38:28,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-10-27 14:38:28,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:38:28,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:38:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:38:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:38:28,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:29,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:29,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:29,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:29,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:29,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:29,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:38:29,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:29,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:29,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:29,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:29,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:29,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:29,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:29,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:29,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:29,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:29,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:38:29,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:29,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:29,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:29,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:29,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 14:38:29,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196778045] [2020-10-27 14:38:29,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:29,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:38:29,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706908006] [2020-10-27 14:38:29,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:38:29,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:38:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:38:29,124 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand 17 states. [2020-10-27 14:38:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:30,977 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2020-10-27 14:38:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:38:30,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-10-27 14:38:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:30,979 INFO L225 Difference]: With dead ends: 146 [2020-10-27 14:38:30,979 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 14:38:30,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:38:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 14:38:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2020-10-27 14:38:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:38:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-10-27 14:38:31,019 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 61 [2020-10-27 14:38:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:31,019 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-10-27 14:38:31,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:38:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-10-27 14:38:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:38:31,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:31,020 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:31,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:38:31,021 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:31,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1275728196, now seen corresponding path program 19 times [2020-10-27 14:38:31,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:31,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225512883] [2020-10-27 14:38:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:31,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:31,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:31,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:31,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:31,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:32,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:32,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:32,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:33,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:35,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:35,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:35,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:35,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:36,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:36,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:36,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:38:36,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:38:36,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:38:36,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:36,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:38:36,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:38:36,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:38:36,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:36,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:36,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:36,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:36,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:36,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:36,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:38:36,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:36,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:36,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:36,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:36,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:36,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:36,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:36,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:36,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:36,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:38:36,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:36,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:36,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:36,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:36,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 72 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:38:36,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225512883] [2020-10-27 14:38:36,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:36,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:38:36,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654670710] [2020-10-27 14:38:36,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:38:36,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:36,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:38:36,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:38:36,426 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand 17 states. [2020-10-27 14:38:38,293 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-27 14:38:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:38,493 INFO L93 Difference]: Finished difference Result 188 states and 201 transitions. [2020-10-27 14:38:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:38:38,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-10-27 14:38:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:38,495 INFO L225 Difference]: With dead ends: 188 [2020-10-27 14:38:38,495 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 14:38:38,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:38:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 14:38:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 132. [2020-10-27 14:38:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:38:38,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-10-27 14:38:38,541 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 61 [2020-10-27 14:38:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:38,541 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-10-27 14:38:38,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:38:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-10-27 14:38:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:38:38,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:38,542 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:38,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:38:38,542 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:38,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1601517767, now seen corresponding path program 20 times [2020-10-27 14:38:38,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:38,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436269454] [2020-10-27 14:38:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:38,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:40,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:40,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:40,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:41,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:41,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:41,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:41,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:41,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:42,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:42,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:43,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:43,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:38:43,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 14:38:43,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:38:43,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:43,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:38:43,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:38:43,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:38:43,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:44,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:44,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:44,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:44,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:44,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:44,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:38:44,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:44,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:44,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:44,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:44,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:44,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:44,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:44,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:44,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:44,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:44,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:38:44,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436269454] [2020-10-27 14:38:44,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:44,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:38:44,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237192597] [2020-10-27 14:38:44,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:38:44,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:44,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:38:44,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:38:44,501 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand 25 states. [2020-10-27 14:38:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:45,956 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2020-10-27 14:38:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:38:45,956 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-10-27 14:38:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:45,957 INFO L225 Difference]: With dead ends: 172 [2020-10-27 14:38:45,957 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:38:45,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:38:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:38:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-10-27 14:38:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:38:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-10-27 14:38:45,996 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 64 [2020-10-27 14:38:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:45,996 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-10-27 14:38:45,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:38:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-10-27 14:38:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:38:45,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:45,997 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:45,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:38:45,997 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:45,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2047922838, now seen corresponding path program 21 times [2020-10-27 14:38:45,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:45,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13072993] [2020-10-27 14:38:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:46,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:47,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:47,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:47,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:48,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:48,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:48,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:48,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:51,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:38:51,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 14:38:51,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:38:51,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:38:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:38:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:38:51,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:51,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:51,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:51,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:51,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:51,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:38:51,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:51,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:51,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:51,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:51,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:51,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:51,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:51,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:51,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:51,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:38:51,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:51,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 29 proven. 88 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:38:51,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13072993] [2020-10-27 14:38:51,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:51,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:38:51,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386942637] [2020-10-27 14:38:51,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:38:51,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:51,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:38:51,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:38:51,641 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand 18 states. [2020-10-27 14:38:53,965 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= c_main_~i~0 0)) (.cse1 (* 9 c_main_~i~0))) (and (or .cse0 (<= 9 (+ .cse1 (* 12 (div (+ (* c_main_~i~0 (- 4)) c_~N~0 2) 4))))) (or .cse0 (<= 9 (+ .cse1 (* 12 (div (+ (* c_main_~i~0 (- 3)) 3) 4))))) (= (* 4 (div c_main_~i~0 4)) c_main_~i~0))) is different from false [2020-10-27 14:38:58,726 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-27 14:39:00,998 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 14:39:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:01,889 INFO L93 Difference]: Finished difference Result 183 states and 194 transitions. [2020-10-27 14:39:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:39:01,889 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-10-27 14:39:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:01,890 INFO L225 Difference]: With dead ends: 183 [2020-10-27 14:39:01,890 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:39:01,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=154, Invalid=841, Unknown=1, NotChecked=60, Total=1056 [2020-10-27 14:39:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:39:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 164. [2020-10-27 14:39:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 14:39:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 175 transitions. [2020-10-27 14:39:01,933 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 175 transitions. Word has length 64 [2020-10-27 14:39:01,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:01,933 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 175 transitions. [2020-10-27 14:39:01,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:39:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 175 transitions. [2020-10-27 14:39:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:39:01,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:01,934 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:01,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:39:01,934 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1530186841, now seen corresponding path program 22 times [2020-10-27 14:39:01,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:01,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905438859] [2020-10-27 14:39:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:06,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:39:06,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:39:06,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:39:06,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:06,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:39:06,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:06,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:39:06,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:07,609 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-27 14:39:07,869 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-10-27 14:39:08,037 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 14:39:08,181 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-27 14:39:08,320 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 14:39:08,466 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-27 14:39:08,622 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-27 14:39:08,774 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-27 14:39:08,934 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-27 14:39:09,205 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-27 14:39:09,419 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2020-10-27 14:39:09,615 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-10-27 14:39:09,836 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2020-10-27 14:39:10,033 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-27 14:39:10,249 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-27 14:39:10,422 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-27 14:39:10,616 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-27 14:39:11,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:11,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:11,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:11,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:11,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:11,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:11,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:11,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:11,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:11,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:11,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:11,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:11,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:11,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:11,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:39:11,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:11,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:11,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905438859] [2020-10-27 14:39:11,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:11,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:39:11,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018226417] [2020-10-27 14:39:11,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:39:11,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:39:11,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:39:11,651 INFO L87 Difference]: Start difference. First operand 164 states and 175 transitions. Second operand 37 states. [2020-10-27 14:39:14,043 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 131 [2020-10-27 14:39:14,401 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 48 [2020-10-27 14:39:14,614 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-27 14:39:15,139 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 52 [2020-10-27 14:39:16,499 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 139 DAG size of output: 130 [2020-10-27 14:39:16,794 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 55 [2020-10-27 14:39:17,055 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 44 [2020-10-27 14:39:17,409 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 51