/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:37:46,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:37:46,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:37:46,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:37:46,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:37:46,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:37:46,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:37:46,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:37:46,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:37:46,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:37:46,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:37:46,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:37:46,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:37:46,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:37:46,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:37:46,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:37:46,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:37:46,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:37:46,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:37:46,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:37:46,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:37:46,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:37:46,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:37:46,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:37:46,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:37:46,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:37:46,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:37:46,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:37:46,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:37:46,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:37:46,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:37:46,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:37:46,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:37:46,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:37:46,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:37:46,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:37:46,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:37:46,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:37:46,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:37:46,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:37:46,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:37:46,743 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 20:37:46,775 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:37:46,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:37:46,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:37:46,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:37:46,778 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:37:46,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:37:46,782 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:37:46,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:37:46,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:37:46,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:37:46,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:37:46,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:37:46,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:37:46,783 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:37:46,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:37:46,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:37:46,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:37:46,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:37:46,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:37:46,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:37:46,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:37:46,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:37:46,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:37:46,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:37:46,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:37:46,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:37:46,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:37:46,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:37:46,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:37:46,787 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:37:47,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:37:47,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:37:47,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:37:47,230 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:37:47,231 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:37:47,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2020-10-27 20:37:47,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6067b5298/f3d3322aa981478ea123209ce42082a4/FLAG8ab130e87 [2020-10-27 20:37:47,938 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:37:47,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-2.i [2020-10-27 20:37:47,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6067b5298/f3d3322aa981478ea123209ce42082a4/FLAG8ab130e87 [2020-10-27 20:37:48,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6067b5298/f3d3322aa981478ea123209ce42082a4 [2020-10-27 20:37:48,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:37:48,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:37:48,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:37:48,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:37:48,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:37:48,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447c6b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48, skipping insertion in model container [2020-10-27 20:37:48,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:37:48,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:37:48,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:37:48,536 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:37:48,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:37:48,584 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:37:48,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48 WrapperNode [2020-10-27 20:37:48,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:37:48,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:37:48,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:37:48,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:37:48,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (1/1) ... [2020-10-27 20:37:48,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:37:48,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:37:48,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:37:48,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:37:48,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (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 20:37:48,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:37:48,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:37:48,718 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:37:48,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:37:48,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:37:48,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:37:48,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:37:48,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:37:48,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:37:48,719 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:37:48,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:37:48,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:37:48,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 20:37:48,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:37:48,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:37:48,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:37:48,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:37:48,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:37:48,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:37:48,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:37:49,142 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:37:49,142 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-27 20:37:49,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:37:49 BoogieIcfgContainer [2020-10-27 20:37:49,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:37:49,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:37:49,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:37:49,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:37:49,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:37:48" (1/3) ... [2020-10-27 20:37:49,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f904881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:37:49, skipping insertion in model container [2020-10-27 20:37:49,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:48" (2/3) ... [2020-10-27 20:37:49,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f904881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:37:49, skipping insertion in model container [2020-10-27 20:37:49,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:37:49" (3/3) ... [2020-10-27 20:37:49,154 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2020-10-27 20:37:49,168 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:37:49,173 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:37:49,191 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:37:49,222 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:37:49,223 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:37:49,223 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:37:49,223 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:37:49,223 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:37:49,223 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:37:49,223 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:37:49,224 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:37:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-27 20:37:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:37:49,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:49,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:49,253 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1191415629, now seen corresponding path program 1 times [2020-10-27 20:37:49,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:49,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582847004] [2020-10-27 20:37:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:49,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:50,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:50,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:37:50,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:37:50,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-27 20:37:50,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:37:50,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:50,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 20:37:50,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:50,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:50,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:50,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:50,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:50,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:37:50,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:50,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:37:50,405 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 20:37:50,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582847004] [2020-10-27 20:37:50,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:37:50,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:37:50,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374643331] [2020-10-27 20:37:50,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:37:50,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:37:50,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:37:50,444 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-27 20:37:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:50,642 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2020-10-27 20:37:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:37:50,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-27 20:37:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:50,655 INFO L225 Difference]: With dead ends: 71 [2020-10-27 20:37:50,655 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:37:50,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:37:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:37:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 20:37:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:37:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-27 20:37:50,721 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 19 [2020-10-27 20:37:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:50,722 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-27 20:37:50,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:37:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-27 20:37:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:37:50,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:50,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:50,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:37:50,726 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:50,728 INFO L82 PathProgramCache]: Analyzing trace with hash 407305100, now seen corresponding path program 1 times [2020-10-27 20:37:50,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:50,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782460872] [2020-10-27 20:37:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:50,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:51,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:37:51,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:37:51,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-27 20:37:51,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:37:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:37:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:37:51,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:51,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:51,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:51,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:51,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:51,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:37:51,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:51,487 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 20:37:51,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782460872] [2020-10-27 20:37:51,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:37:51,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:37:51,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023530419] [2020-10-27 20:37:51,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:37:51,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:51,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:37:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:37:51,493 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 7 states. [2020-10-27 20:37:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:51,795 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-10-27 20:37:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:37:51,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:37:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:51,799 INFO L225 Difference]: With dead ends: 57 [2020-10-27 20:37:51,799 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:37:51,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:37:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:37:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-10-27 20:37:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:37:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-27 20:37:51,813 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2020-10-27 20:37:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:51,813 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-27 20:37:51,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:37:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-27 20:37:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:37:51,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:51,815 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 20:37:51,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:37:51,816 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1565068645, now seen corresponding path program 1 times [2020-10-27 20:37:51,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:51,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056463189] [2020-10-27 20:37:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:51,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:54,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:37:54,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:37:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2733 [2020-10-27 20:37:54,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:37:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:37:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:37:54,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:54,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:54,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:54,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:54,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:54,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:37:54,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:54,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:54,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056463189] [2020-10-27 20:37:54,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:54,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:37:54,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303644568] [2020-10-27 20:37:54,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:37:54,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:37:54,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:37:54,703 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 5 states. [2020-10-27 20:37:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:54,873 INFO L93 Difference]: Finished difference Result 98 states and 136 transitions. [2020-10-27 20:37:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:37:54,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-27 20:37:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:54,876 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:37:54,876 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:37:54,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:37:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:37:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-10-27 20:37:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 20:37:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-10-27 20:37:54,903 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 27 [2020-10-27 20:37:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:54,904 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-10-27 20:37:54,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:37:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-10-27 20:37:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:37:54,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:54,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:54,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:37:54,906 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:54,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash -920144338, now seen corresponding path program 2 times [2020-10-27 20:37:54,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:54,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027940654] [2020-10-27 20:37:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:54,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:56,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:59,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:59,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:37:59,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:37:59,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 20:37:59,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:59,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:37:59,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:37:59,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:37:59,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:00,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:00,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:00,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:00,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:38:00,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:00,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:00,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:00,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:38:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:00,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027940654] [2020-10-27 20:38:00,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:00,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:38:00,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102341121] [2020-10-27 20:38:00,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:38:00,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:00,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:38:00,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:38:00,072 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 6 states. [2020-10-27 20:38:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:00,235 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2020-10-27 20:38:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:38:00,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-27 20:38:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:00,237 INFO L225 Difference]: With dead ends: 126 [2020-10-27 20:38:00,237 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:38:00,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:38:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:38:00,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-10-27 20:38:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:38:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2020-10-27 20:38:00,249 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 30 [2020-10-27 20:38:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:00,250 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2020-10-27 20:38:00,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:38:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2020-10-27 20:38:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:38:00,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:00,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:00,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:38:00,252 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1253872443, now seen corresponding path program 3 times [2020-10-27 20:38:00,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:00,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358442223] [2020-10-27 20:38:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:01,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:01,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:02,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:02,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:04,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:05,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:38:05,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:38:05,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 20:38:05,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:05,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:38:05,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:38:05,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:38:05,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:05,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:05,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:05,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:05,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:05,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:38:05,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:05,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:05,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:05,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:05,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:05,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358442223] [2020-10-27 20:38:05,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:05,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:38:05,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800014984] [2020-10-27 20:38:05,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:38:05,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:05,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:38:05,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:38:05,426 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 7 states. [2020-10-27 20:38:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:05,646 INFO L93 Difference]: Finished difference Result 150 states and 200 transitions. [2020-10-27 20:38:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:38:05,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-27 20:38:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:05,648 INFO L225 Difference]: With dead ends: 150 [2020-10-27 20:38:05,649 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:38:05,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:38:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:38:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-10-27 20:38:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:38:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2020-10-27 20:38:05,673 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 33 [2020-10-27 20:38:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:05,674 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2020-10-27 20:38:05,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:38:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2020-10-27 20:38:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:38:05,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:05,677 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:05,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:38:05,677 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:05,678 INFO L82 PathProgramCache]: Analyzing trace with hash -498558258, now seen corresponding path program 4 times [2020-10-27 20:38:05,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:05,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766091508] [2020-10-27 20:38:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:05,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:06,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:06,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:06,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:06,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:06,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:06,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:09,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:09,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:09,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:10,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:10,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:38:10,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 20:38:10,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:38:10,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:10,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:38:10,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:38:10,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:38:10,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:10,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:10,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:10,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:10,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:10,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:10,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:38:10,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:10,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:10,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:10,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:10,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:10,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766091508] [2020-10-27 20:38:10,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:10,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:38:10,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381378013] [2020-10-27 20:38:10,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:38:10,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:38:10,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:38:10,825 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand 8 states. [2020-10-27 20:38:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:11,052 INFO L93 Difference]: Finished difference Result 174 states and 232 transitions. [2020-10-27 20:38:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:38:11,053 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 20:38:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:11,054 INFO L225 Difference]: With dead ends: 174 [2020-10-27 20:38:11,054 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:38:11,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:38:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:38:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-10-27 20:38:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 20:38:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2020-10-27 20:38:11,075 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 36 [2020-10-27 20:38:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:11,075 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2020-10-27 20:38:11,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:38:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2020-10-27 20:38:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:38:11,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:11,077 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:11,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:38:11,078 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash -267336667, now seen corresponding path program 5 times [2020-10-27 20:38:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:11,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122681850] [2020-10-27 20:38:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:11,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:12,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:12,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:13,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:14,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:16,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:16,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:38:16,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:38:16,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:38:16,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:16,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:38:16,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:38:16,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:38:16,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:16,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:16,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:16,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:16,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:16,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:16,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:38:16,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:16,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:16,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:16,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:16,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:16,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122681850] [2020-10-27 20:38:16,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:16,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:38:16,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869374456] [2020-10-27 20:38:16,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:38:16,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:16,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:38:16,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:38:16,246 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand 9 states. [2020-10-27 20:38:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:16,507 INFO L93 Difference]: Finished difference Result 198 states and 264 transitions. [2020-10-27 20:38:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:38:16,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-27 20:38:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:16,510 INFO L225 Difference]: With dead ends: 198 [2020-10-27 20:38:16,510 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:38:16,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:38:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:38:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-10-27 20:38:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 20:38:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2020-10-27 20:38:16,541 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 39 [2020-10-27 20:38:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:16,542 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2020-10-27 20:38:16,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:38:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2020-10-27 20:38:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:38:16,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:16,548 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:16,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:38:16,549 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1072461970, now seen corresponding path program 6 times [2020-10-27 20:38:16,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:16,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137115933] [2020-10-27 20:38:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:16,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:16,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:18,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:18,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:19,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:21,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:21,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:38:21,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:38:21,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 20:38:21,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:38:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:38:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:38:21,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:21,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:21,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:21,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:21,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:21,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:21,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:38:21,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:21,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:21,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137115933] [2020-10-27 20:38:21,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:21,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:38:21,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27902969] [2020-10-27 20:38:21,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:38:21,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:21,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:38:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:38:21,777 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand 10 states. [2020-10-27 20:38:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:22,114 INFO L93 Difference]: Finished difference Result 222 states and 296 transitions. [2020-10-27 20:38:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:38:22,115 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-27 20:38:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:22,116 INFO L225 Difference]: With dead ends: 222 [2020-10-27 20:38:22,116 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 20:38:22,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:38:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 20:38:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-10-27 20:38:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 20:38:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2020-10-27 20:38:22,130 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 42 [2020-10-27 20:38:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:22,130 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2020-10-27 20:38:22,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:38:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2020-10-27 20:38:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:38:22,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:22,132 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 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 20:38:22,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:38:22,132 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:22,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:22,138 INFO L82 PathProgramCache]: Analyzing trace with hash 831984517, now seen corresponding path program 7 times [2020-10-27 20:38:22,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:22,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750773626] [2020-10-27 20:38:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:22,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:22,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:22,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:22,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:22,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:22,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:22,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:22,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:23,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:23,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:24,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:27,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:27,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:38:27,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 20:38:27,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:38:27,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:38:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:38:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:38:27,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:27,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:27,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:27,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:27,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:27,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:27,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:38:27,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:27,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:27,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:27,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:27,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:27,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750773626] [2020-10-27 20:38:27,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:27,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:38:27,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752799174] [2020-10-27 20:38:27,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:38:27,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:27,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:38:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:38:27,363 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand 11 states. [2020-10-27 20:38:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:27,852 INFO L93 Difference]: Finished difference Result 246 states and 328 transitions. [2020-10-27 20:38:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:38:27,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-27 20:38:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:27,854 INFO L225 Difference]: With dead ends: 246 [2020-10-27 20:38:27,854 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 20:38:27,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:38:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 20:38:27,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-10-27 20:38:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 20:38:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 171 transitions. [2020-10-27 20:38:27,876 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 171 transitions. Word has length 45 [2020-10-27 20:38:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:27,877 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 171 transitions. [2020-10-27 20:38:27,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:38:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 171 transitions. [2020-10-27 20:38:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:38:27,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:27,881 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:27,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:38:27,882 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:27,882 INFO L82 PathProgramCache]: Analyzing trace with hash -320701426, now seen corresponding path program 8 times [2020-10-27 20:38:27,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:27,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223847816] [2020-10-27 20:38:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:27,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:27,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:28,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:28,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:28,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:28,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:28,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:28,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:28,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:29,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:30,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:30,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:30,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:30,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:32,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:32,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:32,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:38:32,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 20:38:32,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:38:32,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:32,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:32,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:38:32,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:38:32,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:32,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:32,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:32,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:32,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:32,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:32,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:38:32,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:32,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:32,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:32,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:32,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-27 20:38:32,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223847816] [2020-10-27 20:38:32,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:38:32,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:38:32,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810540760] [2020-10-27 20:38:32,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:38:32,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:38:32,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:38:32,992 INFO L87 Difference]: Start difference. First operand 131 states and 171 transitions. Second operand 4 states. [2020-10-27 20:38:33,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:33,086 INFO L93 Difference]: Finished difference Result 312 states and 411 transitions. [2020-10-27 20:38:33,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:38:33,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-27 20:38:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:33,089 INFO L225 Difference]: With dead ends: 312 [2020-10-27 20:38:33,089 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 20:38:33,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:38:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 20:38:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 135. [2020-10-27 20:38:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 20:38:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 176 transitions. [2020-10-27 20:38:33,105 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 176 transitions. Word has length 48 [2020-10-27 20:38:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:33,105 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 176 transitions. [2020-10-27 20:38:33,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:38:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 176 transitions. [2020-10-27 20:38:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:38:33,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:33,110 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:33,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:38:33,110 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:33,111 INFO L82 PathProgramCache]: Analyzing trace with hash -982407554, now seen corresponding path program 1 times [2020-10-27 20:38:33,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:33,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665126808] [2020-10-27 20:38:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:33,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:34,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:34,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:34,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:35,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:35,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:38,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:38,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:38:38,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 20:38:38,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:38:38,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:38:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:38:38,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:38:38,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:38,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:38,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:38,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:38,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:38,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:38,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:38:38,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:38,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:38:38,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665126808] [2020-10-27 20:38:38,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:38,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:38:38,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388655044] [2020-10-27 20:38:38,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:38:38,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:38:38,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:38:38,377 INFO L87 Difference]: Start difference. First operand 135 states and 176 transitions. Second operand 12 states. [2020-10-27 20:38:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:38,878 INFO L93 Difference]: Finished difference Result 229 states and 303 transitions. [2020-10-27 20:38:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:38:38,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-27 20:38:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:38,881 INFO L225 Difference]: With dead ends: 229 [2020-10-27 20:38:38,881 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 20:38:38,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:38:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 20:38:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2020-10-27 20:38:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 20:38:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2020-10-27 20:38:38,898 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 49 [2020-10-27 20:38:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:38,901 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2020-10-27 20:38:38,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:38:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2020-10-27 20:38:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:38:38,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:38,902 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:38,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:38:38,902 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1591298323, now seen corresponding path program 1 times [2020-10-27 20:38:38,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:38,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888413240] [2020-10-27 20:38:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:38,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:39,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:39,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:39,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:39,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:39,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:39,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:39,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:41,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:43,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:43,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:43,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:43,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:43,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:38:43,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 20:38:43,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 20:38:43,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:43,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:38:43,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:38:43,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:38:43,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:44,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:44,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:44,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:44,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:44,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:44,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:38:44,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:44,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:44,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:44,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:44,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-27 20:38:44,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888413240] [2020-10-27 20:38:44,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:44,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:38:44,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796967993] [2020-10-27 20:38:44,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:38:44,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:38:44,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:38:44,609 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand 11 states. [2020-10-27 20:38:55,336 WARN L193 SmtUtils]: Spent 8.40 s on a formula simplification that was a NOOP. DAG size: 47 [2020-10-27 20:39:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:01,531 INFO L93 Difference]: Finished difference Result 444 states and 587 transitions. [2020-10-27 20:39:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:39:01,532 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-27 20:39:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:01,535 INFO L225 Difference]: With dead ends: 444 [2020-10-27 20:39:01,536 INFO L226 Difference]: Without dead ends: 437 [2020-10-27 20:39:01,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=71, Invalid=232, Unknown=3, NotChecked=0, Total=306 [2020-10-27 20:39:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-27 20:39:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 195. [2020-10-27 20:39:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 20:39:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 257 transitions. [2020-10-27 20:39:01,573 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 257 transitions. Word has length 50 [2020-10-27 20:39:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:01,573 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 257 transitions. [2020-10-27 20:39:01,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:39:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 257 transitions. [2020-10-27 20:39:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 20:39:01,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:01,574 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:01,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:39:01,575 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1171042980, now seen corresponding path program 2 times [2020-10-27 20:39:01,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:01,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297650497] [2020-10-27 20:39:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:01,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:01,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:03,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:03,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:03,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:04,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:04,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:05,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:05,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:05,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:05,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:06,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:06,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:39:06,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:39:06,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:39:06,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:06,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:39:06,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:39:06,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:39:06,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:06,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:06,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:06,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:06,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:06,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:06,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:39:06,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:06,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:06,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:06,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:06,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:39:06,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297650497] [2020-10-27 20:39:06,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:06,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:39:06,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256409965] [2020-10-27 20:39:06,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:39:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:39:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:39:06,871 INFO L87 Difference]: Start difference. First operand 195 states and 257 transitions. Second operand 13 states. [2020-10-27 20:39:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:07,533 INFO L93 Difference]: Finished difference Result 347 states and 461 transitions. [2020-10-27 20:39:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:39:07,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-27 20:39:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:07,535 INFO L225 Difference]: With dead ends: 347 [2020-10-27 20:39:07,535 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 20:39:07,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:39:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 20:39:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 199. [2020-10-27 20:39:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 20:39:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 259 transitions. [2020-10-27 20:39:07,563 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 259 transitions. Word has length 52 [2020-10-27 20:39:07,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:07,563 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 259 transitions. [2020-10-27 20:39:07,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:39:07,563 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 259 transitions. [2020-10-27 20:39:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:39:07,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:07,564 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:07,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:39:07,565 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:07,565 INFO L82 PathProgramCache]: Analyzing trace with hash 689401022, now seen corresponding path program 3 times [2020-10-27 20:39:07,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:07,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469966846] [2020-10-27 20:39:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:07,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:07,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:08,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:08,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:08,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:08,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:09,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:09,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:09,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:09,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:09,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:09,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:10,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:10,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:12,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:12,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 20:39:12,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 20:39:12,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:39:12,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:39:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:39:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:39:12,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:12,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:12,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:12,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:12,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:12,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:12,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:12,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:12,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:12,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:12,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:12,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-27 20:39:12,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469966846] [2020-10-27 20:39:12,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:39:12,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:39:12,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140186654] [2020-10-27 20:39:12,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:39:12,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:12,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:39:12,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:39:12,742 INFO L87 Difference]: Start difference. First operand 199 states and 259 transitions. Second operand 8 states. [2020-10-27 20:39:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:12,956 INFO L93 Difference]: Finished difference Result 277 states and 359 transitions. [2020-10-27 20:39:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:39:12,960 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 20:39:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:12,961 INFO L225 Difference]: With dead ends: 277 [2020-10-27 20:39:12,961 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 20:39:12,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:39:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 20:39:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-10-27 20:39:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 20:39:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 256 transitions. [2020-10-27 20:39:12,991 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 256 transitions. Word has length 55 [2020-10-27 20:39:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:12,991 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 256 transitions. [2020-10-27 20:39:12,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:39:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 256 transitions. [2020-10-27 20:39:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:39:12,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:12,993 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:12,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:39:12,993 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 246800409, now seen corresponding path program 1 times [2020-10-27 20:39:12,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:12,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232230061] [2020-10-27 20:39:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:13,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:14,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:15,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:15,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:16,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:16,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:17,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:18,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:18,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:18,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:39:18,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 20:39:18,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-27 20:39:18,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:18,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:39:18,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:39:18,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:39:18,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:18,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:18,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:18,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:18,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:18,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:18,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:18,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:18,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:18,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:18,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:18,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-27 20:39:18,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232230061] [2020-10-27 20:39:18,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:18,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:39:18,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017309036] [2020-10-27 20:39:18,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:39:18,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:18,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:39:18,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:39:18,214 INFO L87 Difference]: Start difference. First operand 197 states and 256 transitions. Second operand 6 states. [2020-10-27 20:39:18,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:18,463 INFO L93 Difference]: Finished difference Result 525 states and 688 transitions. [2020-10-27 20:39:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:39:18,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 20:39:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:18,467 INFO L225 Difference]: With dead ends: 525 [2020-10-27 20:39:18,467 INFO L226 Difference]: Without dead ends: 449 [2020-10-27 20:39:18,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:39:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-27 20:39:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 201. [2020-10-27 20:39:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 20:39:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 261 transitions. [2020-10-27 20:39:18,505 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 261 transitions. Word has length 57 [2020-10-27 20:39:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:18,505 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 261 transitions. [2020-10-27 20:39:18,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:39:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 261 transitions. [2020-10-27 20:39:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:39:18,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:18,507 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:18,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:39:18,507 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:18,508 INFO L82 PathProgramCache]: Analyzing trace with hash 109373620, now seen corresponding path program 2 times [2020-10-27 20:39:18,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:18,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935866408] [2020-10-27 20:39:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:18,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:18,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:18,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:18,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:18,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:18,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:19,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:19,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:19,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:20,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:21,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:21,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:23,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:23,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:39:23,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:39:23,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:39:23,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:23,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:39:23,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:39:23,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:39:23,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:23,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:23,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:23,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:23,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:23,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:23,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:23,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:23,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:23,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:23,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:23,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-27 20:39:23,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935866408] [2020-10-27 20:39:23,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:23,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:39:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804530372] [2020-10-27 20:39:23,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:39:23,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:39:23,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:39:23,703 INFO L87 Difference]: Start difference. First operand 201 states and 261 transitions. Second operand 7 states. [2020-10-27 20:39:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:24,126 INFO L93 Difference]: Finished difference Result 705 states and 926 transitions. [2020-10-27 20:39:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:39:24,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-27 20:39:24,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:24,132 INFO L225 Difference]: With dead ends: 705 [2020-10-27 20:39:24,132 INFO L226 Difference]: Without dead ends: 629 [2020-10-27 20:39:24,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:39:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-10-27 20:39:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 203. [2020-10-27 20:39:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 20:39:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 264 transitions. [2020-10-27 20:39:24,182 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 264 transitions. Word has length 59 [2020-10-27 20:39:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:24,183 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 264 transitions. [2020-10-27 20:39:24,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:39:24,183 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 264 transitions. [2020-10-27 20:39:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:39:24,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:24,190 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:24,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:39:24,191 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1186215567, now seen corresponding path program 3 times [2020-10-27 20:39:24,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:24,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373726834] [2020-10-27 20:39:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:24,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:24,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:24,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:24,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:24,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:24,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:24,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:25,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:25,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:25,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:26,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:27,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:28,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:28,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:28,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:29,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:39:29,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 20:39:29,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 20:39:29,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:29,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:39:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:39:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:39:29,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:29,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:29,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:29,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:29,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:29,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:29,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-27 20:39:29,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373726834] [2020-10-27 20:39:29,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:29,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:39:29,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22644930] [2020-10-27 20:39:29,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:39:29,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:29,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:39:29,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:39:29,453 INFO L87 Difference]: Start difference. First operand 203 states and 264 transitions. Second operand 8 states. [2020-10-27 20:39:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:29,910 INFO L93 Difference]: Finished difference Result 885 states and 1164 transitions. [2020-10-27 20:39:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:39:29,911 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-27 20:39:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:29,915 INFO L225 Difference]: With dead ends: 885 [2020-10-27 20:39:29,915 INFO L226 Difference]: Without dead ends: 809 [2020-10-27 20:39:29,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:39:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2020-10-27 20:39:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 205. [2020-10-27 20:39:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-27 20:39:29,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 267 transitions. [2020-10-27 20:39:29,959 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 267 transitions. Word has length 61 [2020-10-27 20:39:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:29,959 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 267 transitions. [2020-10-27 20:39:29,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:39:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 267 transitions. [2020-10-27 20:39:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:39:29,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:29,963 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:29,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:39:29,964 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash 944208298, now seen corresponding path program 4 times [2020-10-27 20:39:29,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:29,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067549413] [2020-10-27 20:39:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:30,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:30,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:30,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:30,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:30,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:30,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:30,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:30,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:30,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:30,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:31,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:31,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:33,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:33,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:34,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:34,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:34,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:39:34,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 20:39:34,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:39:34,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:34,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:39:34,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:39:34,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:39:34,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:35,428 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-27 20:39:35,609 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-10-27 20:39:35,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:35,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:35,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:35,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:35,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:35,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:39:35,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:35,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:35,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:35,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:35,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-10-27 20:39:35,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067549413] [2020-10-27 20:39:35,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:39:35,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 20:39:35,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915657921] [2020-10-27 20:39:35,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:39:35,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:35,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:39:35,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:39:35,716 INFO L87 Difference]: Start difference. First operand 205 states and 267 transitions. Second operand 9 states. [2020-10-27 20:39:36,070 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 20:39:36,339 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 20:39:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:36,568 INFO L93 Difference]: Finished difference Result 355 states and 462 transitions. [2020-10-27 20:39:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:39:36,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-10-27 20:39:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:36,571 INFO L225 Difference]: With dead ends: 355 [2020-10-27 20:39:36,571 INFO L226 Difference]: Without dead ends: 277 [2020-10-27 20:39:36,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:39:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-27 20:39:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 197. [2020-10-27 20:39:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 20:39:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 255 transitions. [2020-10-27 20:39:36,612 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 255 transitions. Word has length 63 [2020-10-27 20:39:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:36,612 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 255 transitions. [2020-10-27 20:39:36,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:39:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 255 transitions. [2020-10-27 20:39:36,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 20:39:36,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:36,614 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:36,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:39:36,614 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:36,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:36,615 INFO L82 PathProgramCache]: Analyzing trace with hash -125636057, now seen corresponding path program 2 times [2020-10-27 20:39:36,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:36,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344358103] [2020-10-27 20:39:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:36,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:36,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:36,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:36,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:37,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:39,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:39,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:40,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:41,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:41,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:41,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 20:39:41,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:39:41,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5256 [2020-10-27 20:39:41,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:41,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:39:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:39:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:39:41,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0