/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/locks/test_locks_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:09:19,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:09:19,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:09:19,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:09:19,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:09:19,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:09:19,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:09:19,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:09:19,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:09:19,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:09:19,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:09:19,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:09:19,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:09:19,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:09:19,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:09:19,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:09:19,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:09:19,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:09:19,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:09:19,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:09:19,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:09:19,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:09:19,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:09:19,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:09:19,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:09:19,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:09:19,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:09:19,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:09:19,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:09:19,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:09:19,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:09:19,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:09:19,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:09:19,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:09:19,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:09:19,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:09:19,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:09:19,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:09:19,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:09:19,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:09:19,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:09:19,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:09:19,561 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:09:19,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:09:19,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:09:19,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:09:19,567 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:09:19,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:09:19,568 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:09:19,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:09:19,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:09:19,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:09:19,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:09:19,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:09:19,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:09:19,570 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:09:19,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:09:19,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:09:19,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:09:19,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:09:19,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:09:19,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:09:19,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:09:19,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:09:19,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:09:19,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:09:19,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:09:19,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:09:19,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:09:19,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:09:19,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:09:19,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:09:19,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:09:20,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:09:20,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:09:20,038 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:09:20,039 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:09:20,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_13.c [2020-10-27 20:09:20,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f77a5e166/1db4d9c0240d48f393fbe7f51309b224/FLAG23da1a17a [2020-10-27 20:09:20,821 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:09:20,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_13.c [2020-10-27 20:09:20,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f77a5e166/1db4d9c0240d48f393fbe7f51309b224/FLAG23da1a17a [2020-10-27 20:09:21,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f77a5e166/1db4d9c0240d48f393fbe7f51309b224 [2020-10-27 20:09:21,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:09:21,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:09:21,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:09:21,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:09:21,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:09:21,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:09:21" (1/1) ... [2020-10-27 20:09:21,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1732d00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21, skipping insertion in model container [2020-10-27 20:09:21,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:09:21" (1/1) ... [2020-10-27 20:09:21,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:09:21,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:09:21,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:09:21,422 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:09:21,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:09:21,534 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:09:21,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21 WrapperNode [2020-10-27 20:09:21,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:09:21,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:09:21,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:09:21,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:09:21,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21" (1/1) ... [2020-10-27 20:09:21,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21" (1/1) ... [2020-10-27 20:09:21,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21" (1/1) ... [2020-10-27 20:09:21,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21" (1/1) ... [2020-10-27 20:09:21,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21" (1/1) ... [2020-10-27 20:09:21,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21" (1/1) ... [2020-10-27 20:09:21,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21" (1/1) ... [2020-10-27 20:09:21,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:09:21,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:09:21,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:09:21,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:09:21,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:09:21,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:09:21,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:09:21,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:09:21,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:09:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:09:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:09:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:09:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:09:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:09:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:09:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:09:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:09:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:09:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:09:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:09:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:09:22,480 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:09:22,480 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:09:22,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:09:22 BoogieIcfgContainer [2020-10-27 20:09:22,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:09:22,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:09:22,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:09:22,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:09:22,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:09:21" (1/3) ... [2020-10-27 20:09:22,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a51595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:09:22, skipping insertion in model container [2020-10-27 20:09:22,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:21" (2/3) ... [2020-10-27 20:09:22,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a51595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:09:22, skipping insertion in model container [2020-10-27 20:09:22,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:09:22" (3/3) ... [2020-10-27 20:09:22,492 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.c [2020-10-27 20:09:22,504 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:09:22,509 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:09:22,524 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:09:22,553 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:09:22,553 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:09:22,553 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:09:22,553 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:09:22,553 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:09:22,554 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:09:22,554 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:09:22,554 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:09:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-10-27 20:09:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:09:22,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:22,581 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] [2020-10-27 20:09:22,582 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1393377580, now seen corresponding path program 1 times [2020-10-27 20:09:22,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:22,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035330467] [2020-10-27 20:09:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:22,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:23,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:23,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:09:23,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:23,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-27 20:09:23,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:09:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:09:23,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:09:23,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:23,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:23,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:23,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:23,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:23,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:09:23,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:23,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:23,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035330467] [2020-10-27 20:09:23,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:23,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:23,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465698294] [2020-10-27 20:09:23,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:23,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:23,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:23,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:23,273 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 4 states. [2020-10-27 20:09:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:23,797 INFO L93 Difference]: Finished difference Result 110 states and 193 transitions. [2020-10-27 20:09:23,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:23,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:09:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:23,827 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:09:23,827 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:09:23,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:09:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-10-27 20:09:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:09:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 115 transitions. [2020-10-27 20:09:23,913 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 115 transitions. Word has length 25 [2020-10-27 20:09:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:23,914 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 115 transitions. [2020-10-27 20:09:23,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 115 transitions. [2020-10-27 20:09:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:09:23,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:23,916 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] [2020-10-27 20:09:23,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:09:23,916 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash -194970322, now seen corresponding path program 1 times [2020-10-27 20:09:23,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:23,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082974979] [2020-10-27 20:09:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:24,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:09:24,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:24,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 20:09:24,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:24,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:24,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:09:24,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:24,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:24,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:24,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:24,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:24,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:09:24,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:24,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:24,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082974979] [2020-10-27 20:09:24,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:24,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:24,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864040508] [2020-10-27 20:09:24,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:24,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:24,190 INFO L87 Difference]: Start difference. First operand 64 states and 115 transitions. Second operand 4 states. [2020-10-27 20:09:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:24,552 INFO L93 Difference]: Finished difference Result 149 states and 275 transitions. [2020-10-27 20:09:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:24,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:09:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:24,555 INFO L225 Difference]: With dead ends: 149 [2020-10-27 20:09:24,555 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:09:24,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:24,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:09:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 20:09:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 20:09:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 163 transitions. [2020-10-27 20:09:24,571 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 163 transitions. Word has length 25 [2020-10-27 20:09:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:24,572 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 163 transitions. [2020-10-27 20:09:24,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 163 transitions. [2020-10-27 20:09:24,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:09:24,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:24,574 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] [2020-10-27 20:09:24,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:09:24,574 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:24,575 INFO L82 PathProgramCache]: Analyzing trace with hash 251610282, now seen corresponding path program 1 times [2020-10-27 20:09:24,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:24,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933468788] [2020-10-27 20:09:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:24,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:24,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:09:24,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:24,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-27 20:09:24,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:24,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:24,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:09:24,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:24,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-10-27 20:09:24,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:24,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:24,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:24,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:24,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:09:24,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:24,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:24,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933468788] [2020-10-27 20:09:24,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:24,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:24,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736536717] [2020-10-27 20:09:24,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:24,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:24,948 INFO L87 Difference]: Start difference. First operand 90 states and 163 transitions. Second operand 4 states. [2020-10-27 20:09:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:25,340 INFO L93 Difference]: Finished difference Result 254 states and 472 transitions. [2020-10-27 20:09:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:25,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 20:09:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:25,344 INFO L225 Difference]: With dead ends: 254 [2020-10-27 20:09:25,344 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 20:09:25,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 20:09:25,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-27 20:09:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 20:09:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 310 transitions. [2020-10-27 20:09:25,363 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 310 transitions. Word has length 26 [2020-10-27 20:09:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:25,363 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 310 transitions. [2020-10-27 20:09:25,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 310 transitions. [2020-10-27 20:09:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:09:25,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:25,365 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] [2020-10-27 20:09:25,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:09:25,365 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1839958184, now seen corresponding path program 1 times [2020-10-27 20:09:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:25,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004674195] [2020-10-27 20:09:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:25,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:25,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:09:25,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:25,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 20:09:25,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:25,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:09:25,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:09:25,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:25,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:25,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:25,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:25,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:25,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:25,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:25,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:25,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:25,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:25,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:25,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004674195] [2020-10-27 20:09:25,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:25,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:25,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102552792] [2020-10-27 20:09:25,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:25,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:25,653 INFO L87 Difference]: Start difference. First operand 169 states and 310 transitions. Second operand 4 states. [2020-10-27 20:09:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:25,902 INFO L93 Difference]: Finished difference Result 221 states and 405 transitions. [2020-10-27 20:09:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:25,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 20:09:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:25,906 INFO L225 Difference]: With dead ends: 221 [2020-10-27 20:09:25,906 INFO L226 Difference]: Without dead ends: 218 [2020-10-27 20:09:25,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:25,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-27 20:09:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-27 20:09:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 20:09:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 308 transitions. [2020-10-27 20:09:25,926 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 308 transitions. Word has length 26 [2020-10-27 20:09:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:25,926 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 308 transitions. [2020-10-27 20:09:25,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 308 transitions. [2020-10-27 20:09:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:09:25,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:25,928 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] [2020-10-27 20:09:25,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:09:25,928 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash -783427017, now seen corresponding path program 1 times [2020-10-27 20:09:25,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:25,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895480598] [2020-10-27 20:09:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:25,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:09:26,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:26,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-27 20:09:26,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:09:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:09:26,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:26,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:26,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:26,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:26,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:26,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:26,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895480598] [2020-10-27 20:09:26,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:26,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:26,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853318565] [2020-10-27 20:09:26,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:26,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:26,157 INFO L87 Difference]: Start difference. First operand 169 states and 308 transitions. Second operand 4 states. [2020-10-27 20:09:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:26,372 INFO L93 Difference]: Finished difference Result 321 states and 591 transitions. [2020-10-27 20:09:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:26,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 20:09:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:26,375 INFO L225 Difference]: With dead ends: 321 [2020-10-27 20:09:26,375 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 20:09:26,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 20:09:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 229. [2020-10-27 20:09:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 20:09:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 416 transitions. [2020-10-27 20:09:26,395 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 416 transitions. Word has length 27 [2020-10-27 20:09:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:26,395 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 416 transitions. [2020-10-27 20:09:26,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 416 transitions. [2020-10-27 20:09:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:09:26,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:26,398 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] [2020-10-27 20:09:26,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:09:26,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1923192377, now seen corresponding path program 1 times [2020-10-27 20:09:26,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:26,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842835355] [2020-10-27 20:09:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:26,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:09:26,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:26,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-27 20:09:26,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:09:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:26,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:26,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:26,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:26,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:26,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:26,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:26,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842835355] [2020-10-27 20:09:26,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:26,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:26,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557054835] [2020-10-27 20:09:26,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:26,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:26,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:26,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:26,664 INFO L87 Difference]: Start difference. First operand 229 states and 416 transitions. Second operand 4 states. [2020-10-27 20:09:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:26,892 INFO L93 Difference]: Finished difference Result 549 states and 1007 transitions. [2020-10-27 20:09:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:26,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 20:09:26,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:26,896 INFO L225 Difference]: With dead ends: 549 [2020-10-27 20:09:26,896 INFO L226 Difference]: Without dead ends: 326 [2020-10-27 20:09:26,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-27 20:09:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2020-10-27 20:09:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 20:09:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 588 transitions. [2020-10-27 20:09:26,916 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 588 transitions. Word has length 27 [2020-10-27 20:09:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:26,916 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 588 transitions. [2020-10-27 20:09:26,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 588 transitions. [2020-10-27 20:09:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:09:26,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:26,919 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 20:09:26,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:09:26,919 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:26,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1490165653, now seen corresponding path program 1 times [2020-10-27 20:09:26,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:26,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544893193] [2020-10-27 20:09:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:26,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:27,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:27,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:09:27,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:09:27,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 20:09:27,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:27,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:27,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:09:27,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:09:27,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:27,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:27,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:27,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:27,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:27,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:27,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:27,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:27,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:27,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544893193] [2020-10-27 20:09:27,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:27,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:27,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189808520] [2020-10-27 20:09:27,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:27,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:27,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:27,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:27,209 INFO L87 Difference]: Start difference. First operand 325 states and 588 transitions. Second operand 4 states. [2020-10-27 20:09:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:27,438 INFO L93 Difference]: Finished difference Result 613 states and 1119 transitions. [2020-10-27 20:09:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:27,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:09:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:27,444 INFO L225 Difference]: With dead ends: 613 [2020-10-27 20:09:27,444 INFO L226 Difference]: Without dead ends: 610 [2020-10-27 20:09:27,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-10-27 20:09:27,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 449. [2020-10-27 20:09:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-27 20:09:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 804 transitions. [2020-10-27 20:09:27,470 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 804 transitions. Word has length 28 [2020-10-27 20:09:27,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:27,470 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 804 transitions. [2020-10-27 20:09:27,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 804 transitions. [2020-10-27 20:09:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:09:27,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:27,474 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 20:09:27,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:09:27,475 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash -98182249, now seen corresponding path program 1 times [2020-10-27 20:09:27,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:27,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468253216] [2020-10-27 20:09:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:27,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:27,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:27,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:27,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:27,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:09:27,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:09:27,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 20:09:27,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:09:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:27,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:27,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:27,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:27,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:27,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:27,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:27,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:27,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:27,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:27,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468253216] [2020-10-27 20:09:27,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:27,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:27,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569824751] [2020-10-27 20:09:27,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:27,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:27,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:27,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:27,841 INFO L87 Difference]: Start difference. First operand 449 states and 804 transitions. Second operand 4 states. [2020-10-27 20:09:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:28,062 INFO L93 Difference]: Finished difference Result 1077 states and 1943 transitions. [2020-10-27 20:09:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:28,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:09:28,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:28,067 INFO L225 Difference]: With dead ends: 1077 [2020-10-27 20:09:28,067 INFO L226 Difference]: Without dead ends: 634 [2020-10-27 20:09:28,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-10-27 20:09:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 633. [2020-10-27 20:09:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-10-27 20:09:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1128 transitions. [2020-10-27 20:09:28,099 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1128 transitions. Word has length 28 [2020-10-27 20:09:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:28,100 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 1128 transitions. [2020-10-27 20:09:28,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1128 transitions. [2020-10-27 20:09:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:09:28,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:28,103 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, 1] [2020-10-27 20:09:28,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:09:28,103 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1042895038, now seen corresponding path program 1 times [2020-10-27 20:09:28,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:28,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502692713] [2020-10-27 20:09:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:28,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:28,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:09:28,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:09:28,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-27 20:09:28,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:28,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:28,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:09:28,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:09:28,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:28,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:28,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:28,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:28,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:09:28,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:28,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:28,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:28,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:28,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:28,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502692713] [2020-10-27 20:09:28,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:28,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:28,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71424156] [2020-10-27 20:09:28,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:28,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:28,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:28,630 INFO L87 Difference]: Start difference. First operand 633 states and 1128 transitions. Second operand 4 states. [2020-10-27 20:09:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:28,862 INFO L93 Difference]: Finished difference Result 1181 states and 2123 transitions. [2020-10-27 20:09:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:28,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:09:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:28,871 INFO L225 Difference]: With dead ends: 1181 [2020-10-27 20:09:28,872 INFO L226 Difference]: Without dead ends: 1178 [2020-10-27 20:09:28,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2020-10-27 20:09:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 889. [2020-10-27 20:09:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2020-10-27 20:09:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1560 transitions. [2020-10-27 20:09:28,916 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1560 transitions. Word has length 29 [2020-10-27 20:09:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:28,916 INFO L481 AbstractCegarLoop]: Abstraction has 889 states and 1560 transitions. [2020-10-27 20:09:28,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1560 transitions. [2020-10-27 20:09:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:09:28,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:28,921 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, 1] [2020-10-27 20:09:28,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:09:28,921 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:28,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:28,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1663724356, now seen corresponding path program 1 times [2020-10-27 20:09:28,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:28,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693195516] [2020-10-27 20:09:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:28,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:29,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:09:29,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:09:29,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-27 20:09:29,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:29,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:29,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:09:29,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:29,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:29,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:29,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:29,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:29,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:29,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:29,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:29,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:29,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:29,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:29,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:29,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693195516] [2020-10-27 20:09:29,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:29,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:29,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583189219] [2020-10-27 20:09:29,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:29,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:29,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:29,429 INFO L87 Difference]: Start difference. First operand 889 states and 1560 transitions. Second operand 4 states. [2020-10-27 20:09:29,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:29,666 INFO L93 Difference]: Finished difference Result 2125 states and 3755 transitions. [2020-10-27 20:09:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:29,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:09:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:29,675 INFO L225 Difference]: With dead ends: 2125 [2020-10-27 20:09:29,675 INFO L226 Difference]: Without dead ends: 1242 [2020-10-27 20:09:29,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-10-27 20:09:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1241. [2020-10-27 20:09:29,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2020-10-27 20:09:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2168 transitions. [2020-10-27 20:09:29,739 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2168 transitions. Word has length 29 [2020-10-27 20:09:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:29,739 INFO L481 AbstractCegarLoop]: Abstraction has 1241 states and 2168 transitions. [2020-10-27 20:09:29,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2168 transitions. [2020-10-27 20:09:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:09:29,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:29,742 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, 1, 1] [2020-10-27 20:09:29,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:09:29,742 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:29,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:29,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2036612736, now seen corresponding path program 1 times [2020-10-27 20:09:29,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:29,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746073977] [2020-10-27 20:09:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:29,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:30,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:30,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:09:30,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:09:30,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-27 20:09:30,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:30,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:09:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:09:30,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:09:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:30,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:30,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:30,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:30,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:30,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:09:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:30,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746073977] [2020-10-27 20:09:30,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:30,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:30,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398033227] [2020-10-27 20:09:30,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:30,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:30,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:30,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:30,624 INFO L87 Difference]: Start difference. First operand 1241 states and 2168 transitions. Second operand 4 states. [2020-10-27 20:09:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:30,900 INFO L93 Difference]: Finished difference Result 2285 states and 4027 transitions. [2020-10-27 20:09:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:30,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 20:09:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:30,916 INFO L225 Difference]: With dead ends: 2285 [2020-10-27 20:09:30,916 INFO L226 Difference]: Without dead ends: 2282 [2020-10-27 20:09:30,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2020-10-27 20:09:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1769. [2020-10-27 20:09:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2020-10-27 20:09:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 3032 transitions. [2020-10-27 20:09:30,996 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 3032 transitions. Word has length 30 [2020-10-27 20:09:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:30,996 INFO L481 AbstractCegarLoop]: Abstraction has 1769 states and 3032 transitions. [2020-10-27 20:09:30,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 3032 transitions. [2020-10-27 20:09:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:09:31,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:31,000 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, 1, 1] [2020-10-27 20:09:31,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:09:31,000 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:31,001 INFO L82 PathProgramCache]: Analyzing trace with hash 448264834, now seen corresponding path program 1 times [2020-10-27 20:09:31,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:31,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696800652] [2020-10-27 20:09:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:31,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:31,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:31,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:31,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:31,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:31,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:31,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:09:31,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:09:31,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-27 20:09:31,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:31,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:31,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:09:31,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:31,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:31,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:31,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:31,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:31,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:31,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:31,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:31,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:31,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:31,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:31,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:31,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:31,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696800652] [2020-10-27 20:09:31,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:31,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:31,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033872288] [2020-10-27 20:09:31,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:31,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:31,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:31,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:31,732 INFO L87 Difference]: Start difference. First operand 1769 states and 3032 transitions. Second operand 4 states. [2020-10-27 20:09:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:31,998 INFO L93 Difference]: Finished difference Result 4205 states and 7259 transitions. [2020-10-27 20:09:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:31,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 20:09:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:32,013 INFO L225 Difference]: With dead ends: 4205 [2020-10-27 20:09:32,013 INFO L226 Difference]: Without dead ends: 2442 [2020-10-27 20:09:32,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2020-10-27 20:09:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2441. [2020-10-27 20:09:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2441 states. [2020-10-27 20:09:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 4168 transitions. [2020-10-27 20:09:32,124 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 4168 transitions. Word has length 30 [2020-10-27 20:09:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:32,125 INFO L481 AbstractCegarLoop]: Abstraction has 2441 states and 4168 transitions. [2020-10-27 20:09:32,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 4168 transitions. [2020-10-27 20:09:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:09:32,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:32,129 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, 1, 1, 1] [2020-10-27 20:09:32,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:09:32,130 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:32,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:32,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1282883507, now seen corresponding path program 1 times [2020-10-27 20:09:32,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:32,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245632166] [2020-10-27 20:09:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:32,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:32,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:32,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:32,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:32,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:32,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:33,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:09:33,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:09:33,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1318 [2020-10-27 20:09:33,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:09:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:09:33,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:33,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:33,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:33,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:33,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:33,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:33,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:33,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:33,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:33,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:33,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:33,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245632166] [2020-10-27 20:09:33,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:33,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:33,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051446155] [2020-10-27 20:09:33,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:33,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:33,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:33,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:33,543 INFO L87 Difference]: Start difference. First operand 2441 states and 4168 transitions. Second operand 4 states. [2020-10-27 20:09:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:33,840 INFO L93 Difference]: Finished difference Result 4429 states and 7627 transitions. [2020-10-27 20:09:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:33,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:09:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:33,870 INFO L225 Difference]: With dead ends: 4429 [2020-10-27 20:09:33,870 INFO L226 Difference]: Without dead ends: 4426 [2020-10-27 20:09:33,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2020-10-27 20:09:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3529. [2020-10-27 20:09:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3529 states. [2020-10-27 20:09:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 5896 transitions. [2020-10-27 20:09:34,072 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 5896 transitions. Word has length 31 [2020-10-27 20:09:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:34,073 INFO L481 AbstractCegarLoop]: Abstraction has 3529 states and 5896 transitions. [2020-10-27 20:09:34,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 5896 transitions. [2020-10-27 20:09:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:09:34,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:34,080 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, 1, 1, 1] [2020-10-27 20:09:34,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:09:34,080 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1423735887, now seen corresponding path program 1 times [2020-10-27 20:09:34,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:34,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890832639] [2020-10-27 20:09:34,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:35,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:09:35,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:09:35,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-27 20:09:35,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:35,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:09:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:35,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:35,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:35,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:35,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:35,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:35,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:35,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:09:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:35,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890832639] [2020-10-27 20:09:35,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:35,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:35,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465509807] [2020-10-27 20:09:35,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:35,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:35,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:35,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:35,453 INFO L87 Difference]: Start difference. First operand 3529 states and 5896 transitions. Second operand 4 states. [2020-10-27 20:09:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:35,822 INFO L93 Difference]: Finished difference Result 8333 states and 14027 transitions. [2020-10-27 20:09:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:35,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:09:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:35,851 INFO L225 Difference]: With dead ends: 8333 [2020-10-27 20:09:35,852 INFO L226 Difference]: Without dead ends: 4810 [2020-10-27 20:09:35,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2020-10-27 20:09:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 4809. [2020-10-27 20:09:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4809 states. [2020-10-27 20:09:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 8008 transitions. [2020-10-27 20:09:36,077 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 8008 transitions. Word has length 31 [2020-10-27 20:09:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:36,077 INFO L481 AbstractCegarLoop]: Abstraction has 4809 states and 8008 transitions. [2020-10-27 20:09:36,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 8008 transitions. [2020-10-27 20:09:36,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:09:36,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:36,084 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, 1, 1, 1, 1] [2020-10-27 20:09:36,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:09:36,084 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1108041365, now seen corresponding path program 1 times [2020-10-27 20:09:36,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:36,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008237102] [2020-10-27 20:09:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:36,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:36,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:36,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:36,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:36,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:36,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:38,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:38,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:09:38,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:09:38,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-27 20:09:38,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:38,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:38,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:09:38,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:09:38,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:38,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:38,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:38,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:38,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:38,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:38,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:38,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:38,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:38,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:38,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:38,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:38,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008237102] [2020-10-27 20:09:38,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:38,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:38,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363469003] [2020-10-27 20:09:38,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:38,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:38,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:38,460 INFO L87 Difference]: Start difference. First operand 4809 states and 8008 transitions. Second operand 4 states. [2020-10-27 20:09:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:38,885 INFO L93 Difference]: Finished difference Result 8589 states and 14411 transitions. [2020-10-27 20:09:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:38,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 20:09:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:38,947 INFO L225 Difference]: With dead ends: 8589 [2020-10-27 20:09:38,948 INFO L226 Difference]: Without dead ends: 8586 [2020-10-27 20:09:38,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:38,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8586 states. [2020-10-27 20:09:39,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8586 to 7049. [2020-10-27 20:09:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7049 states. [2020-10-27 20:09:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 11464 transitions. [2020-10-27 20:09:39,295 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 11464 transitions. Word has length 32 [2020-10-27 20:09:39,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:39,296 INFO L481 AbstractCegarLoop]: Abstraction has 7049 states and 11464 transitions. [2020-10-27 20:09:39,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 11464 transitions. [2020-10-27 20:09:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:09:39,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:39,308 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, 1, 1, 1, 1] [2020-10-27 20:09:39,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:09:39,309 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:39,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1598578029, now seen corresponding path program 1 times [2020-10-27 20:09:39,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:39,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465851521] [2020-10-27 20:09:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:39,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:39,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:39,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:39,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:39,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:39,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:41,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:41,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:09:41,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:09:41,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2210 [2020-10-27 20:09:41,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:41,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:41,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:09:41,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:41,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:41,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:41,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:41,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:41,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:41,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:41,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:41,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:41,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:41,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:41,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465851521] [2020-10-27 20:09:41,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:41,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:41,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361661186] [2020-10-27 20:09:41,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:41,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:41,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:41,613 INFO L87 Difference]: Start difference. First operand 7049 states and 11464 transitions. Second operand 4 states. [2020-10-27 20:09:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:42,122 INFO L93 Difference]: Finished difference Result 16525 states and 27083 transitions. [2020-10-27 20:09:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:42,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 20:09:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:42,146 INFO L225 Difference]: With dead ends: 16525 [2020-10-27 20:09:42,146 INFO L226 Difference]: Without dead ends: 9482 [2020-10-27 20:09:42,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9482 states. [2020-10-27 20:09:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9482 to 9481. [2020-10-27 20:09:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9481 states. [2020-10-27 20:09:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9481 states to 9481 states and 15368 transitions. [2020-10-27 20:09:42,600 INFO L78 Accepts]: Start accepts. Automaton has 9481 states and 15368 transitions. Word has length 32 [2020-10-27 20:09:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:42,600 INFO L481 AbstractCegarLoop]: Abstraction has 9481 states and 15368 transitions. [2020-10-27 20:09:42,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 9481 states and 15368 transitions. [2020-10-27 20:09:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:09:42,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:42,612 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, 1, 1, 1, 1, 1] [2020-10-27 20:09:42,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:09:42,612 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:42,613 INFO L82 PathProgramCache]: Analyzing trace with hash 17108312, now seen corresponding path program 1 times [2020-10-27 20:09:42,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:42,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939260110] [2020-10-27 20:09:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:42,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:42,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:42,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:42,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:42,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:42,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:43,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:46,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:46,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:09:46,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:09:46,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4130 [2020-10-27 20:09:46,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:09:46,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:09:46,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:46,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:46,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:46,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:46,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:46,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:46,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:46,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:46,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:46,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939260110] [2020-10-27 20:09:46,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:46,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:46,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495900815] [2020-10-27 20:09:46,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:46,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:46,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:46,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:46,815 INFO L87 Difference]: Start difference. First operand 9481 states and 15368 transitions. Second operand 4 states. [2020-10-27 20:09:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:47,361 INFO L93 Difference]: Finished difference Result 16653 states and 27147 transitions. [2020-10-27 20:09:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:47,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 20:09:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:47,406 INFO L225 Difference]: With dead ends: 16653 [2020-10-27 20:09:47,406 INFO L226 Difference]: Without dead ends: 16650 [2020-10-27 20:09:47,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2020-10-27 20:09:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 14089. [2020-10-27 20:09:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14089 states. [2020-10-27 20:09:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14089 states to 14089 states and 22280 transitions. [2020-10-27 20:09:47,933 INFO L78 Accepts]: Start accepts. Automaton has 14089 states and 22280 transitions. Word has length 33 [2020-10-27 20:09:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:47,933 INFO L481 AbstractCegarLoop]: Abstraction has 14089 states and 22280 transitions. [2020-10-27 20:09:47,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 14089 states and 22280 transitions. [2020-10-27 20:09:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:09:47,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:47,954 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, 1, 1, 1, 1, 1] [2020-10-27 20:09:47,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:09:47,955 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:47,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1571239590, now seen corresponding path program 1 times [2020-10-27 20:09:47,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:47,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885831073] [2020-10-27 20:09:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:47,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:47,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:48,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:48,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:48,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:48,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:51,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:51,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:09:51,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:09:51,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3852 [2020-10-27 20:09:51,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:51,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:51,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:09:51,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:51,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:51,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:51,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:51,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:51,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:51,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:51,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:09:51,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:51,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:51,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:51,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:51,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885831073] [2020-10-27 20:09:51,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:51,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:51,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214006969] [2020-10-27 20:09:51,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:51,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:51,896 INFO L87 Difference]: Start difference. First operand 14089 states and 22280 transitions. Second operand 4 states. [2020-10-27 20:09:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:52,490 INFO L93 Difference]: Finished difference Result 32781 states and 52235 transitions. [2020-10-27 20:09:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:52,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 20:09:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:52,537 INFO L225 Difference]: With dead ends: 32781 [2020-10-27 20:09:52,537 INFO L226 Difference]: Without dead ends: 18698 [2020-10-27 20:09:52,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18698 states. [2020-10-27 20:09:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18698 to 18697. [2020-10-27 20:09:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18697 states. [2020-10-27 20:09:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18697 states to 18697 states and 29448 transitions. [2020-10-27 20:09:53,296 INFO L78 Accepts]: Start accepts. Automaton has 18697 states and 29448 transitions. Word has length 33 [2020-10-27 20:09:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:53,297 INFO L481 AbstractCegarLoop]: Abstraction has 18697 states and 29448 transitions. [2020-10-27 20:09:53,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 18697 states and 29448 transitions. [2020-10-27 20:09:53,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:09:53,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:53,320 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, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:53,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:09:53,321 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash 537020502, now seen corresponding path program 1 times [2020-10-27 20:09:53,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:53,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897974834] [2020-10-27 20:09:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:53,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:53,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:53,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:53,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:53,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:53,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:58,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:58,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:09:58,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:58,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:09:58,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:58,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:58,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:09:58,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:58,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:58,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:58,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:58,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:58,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:58,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:58,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:58,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:58,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:58,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:58,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:58,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:58,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897974834] [2020-10-27 20:09:58,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:58,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:58,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728335377] [2020-10-27 20:09:58,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:58,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:58,395 INFO L87 Difference]: Start difference. First operand 18697 states and 29448 transitions. Second operand 4 states. [2020-10-27 20:09:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:59,340 INFO L93 Difference]: Finished difference Result 55565 states and 87307 transitions. [2020-10-27 20:09:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:59,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-27 20:09:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:59,438 INFO L225 Difference]: With dead ends: 55565 [2020-10-27 20:09:59,439 INFO L226 Difference]: Without dead ends: 36874 [2020-10-27 20:09:59,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36874 states. [2020-10-27 20:10:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36874 to 36873. [2020-10-27 20:10:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36873 states. [2020-10-27 20:10:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36873 states to 36873 states and 56840 transitions. [2020-10-27 20:10:00,776 INFO L78 Accepts]: Start accepts. Automaton has 36873 states and 56840 transitions. Word has length 34 [2020-10-27 20:10:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:00,776 INFO L481 AbstractCegarLoop]: Abstraction has 36873 states and 56840 transitions. [2020-10-27 20:10:00,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 36873 states and 56840 transitions. [2020-10-27 20:10:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:10:00,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:00,825 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, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:00,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:10:00,825 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:00,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:00,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2125368404, now seen corresponding path program 1 times [2020-10-27 20:10:00,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:00,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992569666] [2020-10-27 20:10:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:00,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:01,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:01,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:01,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:01,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:01,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:01,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:01,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:01,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:05,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:05,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:10:05,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:10:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:10:05,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:05,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:05,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:10:05,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:10:05,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:05,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:05,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:05,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:05,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:05,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:10:05,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:05,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:05,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:05,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992569666] [2020-10-27 20:10:05,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:05,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:05,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723911321] [2020-10-27 20:10:05,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:05,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:05,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:05,898 INFO L87 Difference]: Start difference. First operand 36873 states and 56840 transitions. Second operand 4 states. [2020-10-27 20:10:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:06,936 INFO L93 Difference]: Finished difference Result 40973 states and 64011 transitions. [2020-10-27 20:10:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:06,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-27 20:10:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:07,011 INFO L225 Difference]: With dead ends: 40973 [2020-10-27 20:10:07,011 INFO L226 Difference]: Without dead ends: 40970 [2020-10-27 20:10:07,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40970 states. [2020-10-27 20:10:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40970 to 36873. [2020-10-27 20:10:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36873 states. [2020-10-27 20:10:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36873 states to 36873 states and 56328 transitions. [2020-10-27 20:10:08,002 INFO L78 Accepts]: Start accepts. Automaton has 36873 states and 56328 transitions. Word has length 34 [2020-10-27 20:10:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:08,002 INFO L481 AbstractCegarLoop]: Abstraction has 36873 states and 56328 transitions. [2020-10-27 20:10:08,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 36873 states and 56328 transitions. [2020-10-27 20:10:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:10:08,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:08,038 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:08,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:10:08,038 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash -525560221, now seen corresponding path program 1 times [2020-10-27 20:10:08,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:08,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448966175] [2020-10-27 20:10:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:08,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:10:13,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:10:13,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:10:13,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 20:10:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:10:13,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:13,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:13,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:13,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:13,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:10:13,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:13,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:13,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:13,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:13,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:13,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448966175] [2020-10-27 20:10:13,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:13,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:13,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592752377] [2020-10-27 20:10:13,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:13,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:13,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:13,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:13,101 INFO L87 Difference]: Start difference. First operand 36873 states and 56328 transitions. Second operand 4 states. [2020-10-27 20:10:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:14,134 INFO L93 Difference]: Finished difference Result 62477 states and 95243 transitions. [2020-10-27 20:10:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:14,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-27 20:10:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:14,268 INFO L225 Difference]: With dead ends: 62477 [2020-10-27 20:10:14,269 INFO L226 Difference]: Without dead ends: 62474 [2020-10-27 20:10:14,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62474 states. [2020-10-27 20:10:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62474 to 56329. [2020-10-27 20:10:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56329 states. [2020-10-27 20:10:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56329 states to 56329 states and 83976 transitions. [2020-10-27 20:10:15,716 INFO L78 Accepts]: Start accepts. Automaton has 56329 states and 83976 transitions. Word has length 35 [2020-10-27 20:10:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:15,716 INFO L481 AbstractCegarLoop]: Abstraction has 56329 states and 83976 transitions. [2020-10-27 20:10:15,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 56329 states and 83976 transitions. [2020-10-27 20:10:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:10:15,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:15,758 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:15,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:10:15,758 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:15,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2113908123, now seen corresponding path program 1 times [2020-10-27 20:10:15,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:15,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033018527] [2020-10-27 20:10:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:15,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:15,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:16,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:20,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:20,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:10:20,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:10:20,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:10:20,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 20:10:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:10:20,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:20,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:20,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:20,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:20,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:20,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:20,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:10:20,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:20,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:20,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:20,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:20,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:20,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033018527] [2020-10-27 20:10:20,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:20,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:20,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770700456] [2020-10-27 20:10:20,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:20,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:20,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:20,821 INFO L87 Difference]: Start difference. First operand 56329 states and 83976 transitions. Second operand 4 states. [2020-10-27 20:10:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:21,966 INFO L93 Difference]: Finished difference Result 129037 states and 193547 transitions. [2020-10-27 20:10:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:21,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-27 20:10:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:22,094 INFO L225 Difference]: With dead ends: 129037 [2020-10-27 20:10:22,094 INFO L226 Difference]: Without dead ends: 72714 [2020-10-27 20:10:22,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72714 states. [2020-10-27 20:10:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72714 to 72713. [2020-10-27 20:10:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72713 states. [2020-10-27 20:10:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72713 states to 72713 states and 107528 transitions. [2020-10-27 20:10:24,408 INFO L78 Accepts]: Start accepts. Automaton has 72713 states and 107528 transitions. Word has length 35 [2020-10-27 20:10:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:24,409 INFO L481 AbstractCegarLoop]: Abstraction has 72713 states and 107528 transitions. [2020-10-27 20:10:24,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 72713 states and 107528 transitions. [2020-10-27 20:10:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:10:24,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:24,464 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:24,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:10:24,464 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:24,465 INFO L82 PathProgramCache]: Analyzing trace with hash 894186305, now seen corresponding path program 1 times [2020-10-27 20:10:24,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:24,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012012148] [2020-10-27 20:10:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:24,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:24,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:24,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:24,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:24,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:24,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:24,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:25,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:25,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:29,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:10:29,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:10:29,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:10:29,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:29,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:29,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:10:29,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:10:29,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:29,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:29,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:29,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:29,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:29,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:10:29,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:29,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:29,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:29,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012012148] [2020-10-27 20:10:29,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:29,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:29,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184398156] [2020-10-27 20:10:29,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:29,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:29,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:29,536 INFO L87 Difference]: Start difference. First operand 72713 states and 107528 transitions. Second operand 4 states. [2020-10-27 20:10:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:31,594 INFO L93 Difference]: Finished difference Result 120845 states and 177163 transitions. [2020-10-27 20:10:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:31,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-27 20:10:31,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:31,742 INFO L225 Difference]: With dead ends: 120845 [2020-10-27 20:10:31,742 INFO L226 Difference]: Without dead ends: 120842 [2020-10-27 20:10:31,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120842 states. [2020-10-27 20:10:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120842 to 112649. [2020-10-27 20:10:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112649 states. [2020-10-27 20:10:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112649 states to 112649 states and 162824 transitions. [2020-10-27 20:10:34,570 INFO L78 Accepts]: Start accepts. Automaton has 112649 states and 162824 transitions. Word has length 36 [2020-10-27 20:10:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:34,571 INFO L481 AbstractCegarLoop]: Abstraction has 112649 states and 162824 transitions. [2020-10-27 20:10:34,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 112649 states and 162824 transitions. [2020-10-27 20:10:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:10:34,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:34,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:34,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:10:34,686 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:34,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:34,687 INFO L82 PathProgramCache]: Analyzing trace with hash -694161597, now seen corresponding path program 1 times [2020-10-27 20:10:34,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:34,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352870763] [2020-10-27 20:10:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:34,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:34,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:34,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:34,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:34,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:34,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:35,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:35,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:35,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:39,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:39,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:10:39,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:10:39,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:10:39,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:39,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:39,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:10:39,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:10:39,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:39,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:39,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:39,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:39,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:39,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:39,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:10:39,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:39,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:39,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:39,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:39,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:39,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352870763] [2020-10-27 20:10:39,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:39,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:39,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361027659] [2020-10-27 20:10:39,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:39,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:39,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:39,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:39,766 INFO L87 Difference]: Start difference. First operand 112649 states and 162824 transitions. Second operand 4 states. [2020-10-27 20:10:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:42,564 INFO L93 Difference]: Finished difference Result 256013 states and 371723 transitions. [2020-10-27 20:10:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:42,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-27 20:10:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:42,805 INFO L225 Difference]: With dead ends: 256013 [2020-10-27 20:10:42,805 INFO L226 Difference]: Without dead ends: 143370 [2020-10-27 20:10:42,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143370 states. [2020-10-27 20:10:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143370 to 143369. [2020-10-27 20:10:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143369 states. [2020-10-27 20:10:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143369 states to 143369 states and 204808 transitions. [2020-10-27 20:10:47,250 INFO L78 Accepts]: Start accepts. Automaton has 143369 states and 204808 transitions. Word has length 36 [2020-10-27 20:10:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:47,250 INFO L481 AbstractCegarLoop]: Abstraction has 143369 states and 204808 transitions. [2020-10-27 20:10:47,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 143369 states and 204808 transitions. [2020-10-27 20:10:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:10:47,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:47,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:47,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:10:47,359 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1956666222, now seen corresponding path program 1 times [2020-10-27 20:10:47,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:47,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965910127] [2020-10-27 20:10:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:47,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:47,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:47,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:47,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:47,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:47,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:47,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:48,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:48,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:48,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:52,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:52,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:10:52,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:10:52,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:10:52,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 20:10:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:10:52,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:52,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:52,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:52,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:52,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:52,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:52,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:10:52,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:52,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:52,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965910127] [2020-10-27 20:10:52,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:52,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:52,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090956385] [2020-10-27 20:10:52,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:52,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:52,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:52,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:52,423 INFO L87 Difference]: Start difference. First operand 143369 states and 204808 transitions. Second operand 4 states. [2020-10-27 20:10:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:56,237 INFO L93 Difference]: Finished difference Result 233484 states and 327690 transitions. [2020-10-27 20:10:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:56,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-27 20:10:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:56,689 INFO L225 Difference]: With dead ends: 233484 [2020-10-27 20:10:56,689 INFO L226 Difference]: Without dead ends: 233481 [2020-10-27 20:10:56,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233481 states. [2020-10-27 20:11:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233481 to 225289. [2020-10-27 20:11:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225289 states. [2020-10-27 20:11:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225289 states to 225289 states and 315400 transitions. [2020-10-27 20:11:02,563 INFO L78 Accepts]: Start accepts. Automaton has 225289 states and 315400 transitions. Word has length 37 [2020-10-27 20:11:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:02,563 INFO L481 AbstractCegarLoop]: Abstraction has 225289 states and 315400 transitions. [2020-10-27 20:11:02,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:11:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 225289 states and 315400 transitions. [2020-10-27 20:11:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:11:03,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:03,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:03,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:11:03,176 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash 368318320, now seen corresponding path program 1 times [2020-10-27 20:11:03,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:03,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397851516] [2020-10-27 20:11:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:03,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:03,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:03,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:03,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:03,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:03,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:03,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:04,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:04,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:04,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:08,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:11:08,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:11:08,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:11:08,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:08,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:11:08,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 20:11:08,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:11:08,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:08,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:08,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:08,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:08,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:08,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:08,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:08,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:08,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:08,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:08,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:08,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397851516] [2020-10-27 20:11:08,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:08,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:11:08,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087492617] [2020-10-27 20:11:08,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:11:08,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:08,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:11:08,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:11:08,241 INFO L87 Difference]: Start difference. First operand 225289 states and 315400 transitions. Second operand 4 states. [2020-10-27 20:11:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:13,548 INFO L93 Difference]: Finished difference Result 507913 states and 712712 transitions. [2020-10-27 20:11:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:11:13,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-27 20:11:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:13,549 INFO L225 Difference]: With dead ends: 507913 [2020-10-27 20:11:13,549 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:11:13,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:11:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:11:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:11:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:11:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:11:13,922 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2020-10-27 20:11:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:13,922 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:11:13,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:11:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:11:13,923 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:11:13,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:11:13,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.