/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/eca-rers2012/Problem05_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:10:11,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:10:11,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:10:11,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:10:11,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:10:11,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:10:11,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:10:11,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:10:11,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:10:11,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:10:11,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:10:11,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:10:11,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:10:11,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:10:11,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:10:11,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:10:11,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:10:11,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:10:11,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:10:11,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:10:11,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:10:11,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:10:11,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:10:11,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:10:11,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:10:11,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:10:11,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:10:11,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:10:11,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:10:11,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:10:11,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:10:11,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:10:11,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:10:11,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:10:11,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:10:11,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:10:11,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:10:11,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:10:11,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:10:11,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:10:11,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:10:11,705 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 16:10:11,762 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:10:11,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:10:11,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:10:11,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:10:11,767 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:10:11,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:10:11,767 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:10:11,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:10:11,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:10:11,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:10:11,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:10:11,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:10:11,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:10:11,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:10:11,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:10:11,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:10:11,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:10:11,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:10:11,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:10:11,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:10:11,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:10:11,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:10:11,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:10:11,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:10:11,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:10:11,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:10:11,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:10:11,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:10:11,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:10:11,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:10:12,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:10:12,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:10:12,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:10:12,228 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:10:12,228 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:10:12,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label14.c [2020-10-27 16:10:12,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/932692a30/94f405f620b94134b21e5e91c21821fe/FLAGf7b7b1efd [2020-10-27 16:10:13,641 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:10:13,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label14.c [2020-10-27 16:10:13,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/932692a30/94f405f620b94134b21e5e91c21821fe/FLAGf7b7b1efd [2020-10-27 16:10:13,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/932692a30/94f405f620b94134b21e5e91c21821fe [2020-10-27 16:10:13,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:10:13,856 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:10:13,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:10:13,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:10:13,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:10:13,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:10:13" (1/1) ... [2020-10-27 16:10:13,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58af187a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:13, skipping insertion in model container [2020-10-27 16:10:13,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:10:13" (1/1) ... [2020-10-27 16:10:13,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:10:14,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:10:16,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:10:16,332 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:10:17,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:10:17,581 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:10:17,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17 WrapperNode [2020-10-27 16:10:17,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:10:17,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:10:17,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:10:17,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:10:17,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17" (1/1) ... [2020-10-27 16:10:17,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17" (1/1) ... [2020-10-27 16:10:17,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17" (1/1) ... [2020-10-27 16:10:17,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17" (1/1) ... [2020-10-27 16:10:18,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17" (1/1) ... [2020-10-27 16:10:18,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17" (1/1) ... [2020-10-27 16:10:18,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17" (1/1) ... [2020-10-27 16:10:18,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:10:18,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:10:18,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:10:18,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:10:18,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17" (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 16:10:18,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:10:18,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:10:18,309 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:10:18,309 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:10:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:10:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:10:18,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:10:18,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:10:18,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 16:10:18,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-27 16:10:18,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-27 16:10:18,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:10:18,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:10:18,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:10:18,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:10:18,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:10:18,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:10:18,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 16:10:18,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-27 16:10:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-27 16:10:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:10:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:10:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:10:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:10:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:10:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:10:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:10:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:10:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:10:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:10:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:10:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:10:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:10:28,797 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:10:28,798 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:10:28,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:10:28 BoogieIcfgContainer [2020-10-27 16:10:28,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:10:28,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:10:28,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:10:28,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:10:28,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:10:13" (1/3) ... [2020-10-27 16:10:28,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652f825f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:10:28, skipping insertion in model container [2020-10-27 16:10:28,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:17" (2/3) ... [2020-10-27 16:10:28,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652f825f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:10:28, skipping insertion in model container [2020-10-27 16:10:28,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:10:28" (3/3) ... [2020-10-27 16:10:28,815 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label14.c [2020-10-27 16:10:28,828 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:10:28,836 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:10:28,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:10:28,904 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:10:28,904 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:10:28,905 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:10:28,905 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:10:28,905 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:10:28,905 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:10:28,905 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:10:28,905 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:10:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-27 16:10:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1679 [2020-10-27 16:10:29,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:10:29,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:10:29,116 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:10:29,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:10:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash -817604353, now seen corresponding path program 1 times [2020-10-27 16:10:29,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:10:29,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122933841] [2020-10-27 16:10:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:10:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:10:30,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:10:35,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:10:35,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1702 [2020-10-27 16:10:35,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:10:35,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5152 [2020-10-27 16:10:35,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:10:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:10:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:10:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1693 [2020-10-27 16:10:35,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 16:10:37,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:10:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:10:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:10:37,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:10:37,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:10:37,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:10:37,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 16:10:37,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:10:37,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:10:37,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:10:37,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:10:37,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:10:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:10:40,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122933841] [2020-10-27 16:10:40,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:10:40,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:10:40,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429279009] [2020-10-27 16:10:40,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:10:40,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:10:40,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:10:40,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:10:40,797 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-27 16:11:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:11:01,206 INFO L93 Difference]: Finished difference Result 6316 states and 11857 transitions. [2020-10-27 16:11:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:11:01,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1678 [2020-10-27 16:11:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:11:01,283 INFO L225 Difference]: With dead ends: 6316 [2020-10-27 16:11:01,283 INFO L226 Difference]: Without dead ends: 4026 [2020-10-27 16:11:01,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:11:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2020-10-27 16:11:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3997. [2020-10-27 16:11:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3997 states. [2020-10-27 16:11:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 6428 transitions. [2020-10-27 16:11:01,537 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 6428 transitions. Word has length 1678 [2020-10-27 16:11:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:11:01,542 INFO L481 AbstractCegarLoop]: Abstraction has 3997 states and 6428 transitions. [2020-10-27 16:11:01,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:11:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 6428 transitions. [2020-10-27 16:11:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1688 [2020-10-27 16:11:01,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:11:01,968 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:11:01,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:11:01,969 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:11:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:11:01,972 INFO L82 PathProgramCache]: Analyzing trace with hash 467068411, now seen corresponding path program 1 times [2020-10-27 16:11:01,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:11:01,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809064280] [2020-10-27 16:11:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:11:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:11:02,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:11:04,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:11:07,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:11:07,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1713 [2020-10-27 16:11:07,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:11:07,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-27 16:11:07,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:11:07,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:11:07,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 16:11:07,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1690 [2020-10-27 16:11:07,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:11:09,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:11:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:11:09,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:11:09,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:11:09,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:11:09,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:11:09,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:11:09,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:11:09,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:11:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:11:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:11:09,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:11:09,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:11:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:11:09,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:11:09,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:11:09,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:11:09,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:11:09,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 16:11:09,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:11:09,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:11:09,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:11:09,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 16:11:09,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:11:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:11:11,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809064280] [2020-10-27 16:11:11,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:11:11,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:11:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948785559] [2020-10-27 16:11:11,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:11:11,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:11:11,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:11:11,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:11:11,623 INFO L87 Difference]: Start difference. First operand 3997 states and 6428 transitions. Second operand 5 states. [2020-10-27 16:11:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:11:35,524 INFO L93 Difference]: Finished difference Result 11667 states and 18986 transitions. [2020-10-27 16:11:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:11:35,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1687 [2020-10-27 16:11:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:11:35,582 INFO L225 Difference]: With dead ends: 11667 [2020-10-27 16:11:35,583 INFO L226 Difference]: Without dead ends: 7676 [2020-10-27 16:11:35,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:11:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2020-10-27 16:11:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 7566. [2020-10-27 16:11:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7566 states. [2020-10-27 16:11:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7566 states to 7566 states and 11904 transitions. [2020-10-27 16:11:35,879 INFO L78 Accepts]: Start accepts. Automaton has 7566 states and 11904 transitions. Word has length 1687 [2020-10-27 16:11:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:11:35,883 INFO L481 AbstractCegarLoop]: Abstraction has 7566 states and 11904 transitions. [2020-10-27 16:11:35,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:11:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7566 states and 11904 transitions. [2020-10-27 16:11:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-10-27 16:11:35,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:11:35,933 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:11:35,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:11:35,933 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:11:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:11:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1206213623, now seen corresponding path program 1 times [2020-10-27 16:11:35,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:11:35,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51745077] [2020-10-27 16:11:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:11:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:11:36,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:11:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:11:41,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:11:41,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1715 [2020-10-27 16:11:41,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:11:41,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-27 16:11:41,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:11:41,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:11:41,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 16:11:41,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1680 [2020-10-27 16:11:41,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:11:43,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:11:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:11:43,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:11:43,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:11:43,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:11:43,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:11:43,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:11:43,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:11:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:11:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:11:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:11:43,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:11:43,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:11:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:11:43,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:11:43,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:11:43,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 16:11:43,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:11:43,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 16:11:43,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:11:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:11:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:11:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 16:11:43,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:11:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:11:58,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51745077] [2020-10-27 16:11:58,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:11:58,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:11:58,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596958274] [2020-10-27 16:11:58,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:11:58,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:11:58,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:11:58,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:11:58,936 INFO L87 Difference]: Start difference. First operand 7566 states and 11904 transitions. Second operand 5 states. [2020-10-27 16:12:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:12:24,494 INFO L93 Difference]: Finished difference Result 16836 states and 27240 transitions. [2020-10-27 16:12:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:12:24,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1689 [2020-10-27 16:12:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:12:24,535 INFO L225 Difference]: With dead ends: 16836 [2020-10-27 16:12:24,535 INFO L226 Difference]: Without dead ends: 7592 [2020-10-27 16:12:24,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:12:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states. [2020-10-27 16:12:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 7566. [2020-10-27 16:12:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7566 states. [2020-10-27 16:12:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7566 states to 7566 states and 10289 transitions. [2020-10-27 16:12:24,761 INFO L78 Accepts]: Start accepts. Automaton has 7566 states and 10289 transitions. Word has length 1689 [2020-10-27 16:12:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:12:24,764 INFO L481 AbstractCegarLoop]: Abstraction has 7566 states and 10289 transitions. [2020-10-27 16:12:24,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:12:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7566 states and 10289 transitions. [2020-10-27 16:12:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1694 [2020-10-27 16:12:24,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:12:24,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:12:24,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:12:24,816 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:12:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:12:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1688033039, now seen corresponding path program 1 times [2020-10-27 16:12:24,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:12:24,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015389011] [2020-10-27 16:12:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:12:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:12:24,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:12:27,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:12:27,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1719 [2020-10-27 16:12:27,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:12:27,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2739 [2020-10-27 16:12:27,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:12:27,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 16:12:27,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:12:27,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 16:12:27,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:12:28,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:12:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:12:28,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:12:28,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:12:28,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:12:28,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:12:28,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 16:12:28,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:12:28,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:12:28,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:12:28,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:12:28,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:12:28,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:12:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:12:28,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:12:28,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:12:28,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 16:12:28,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:12:28,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 16:12:28,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:12:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:12:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:12:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 16:12:28,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:12:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:12:29,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015389011] [2020-10-27 16:12:29,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:12:29,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 16:12:29,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032595028] [2020-10-27 16:12:29,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:12:29,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:12:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:12:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:12:29,696 INFO L87 Difference]: Start difference. First operand 7566 states and 10289 transitions. Second operand 7 states. [2020-10-27 16:12:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:12:52,195 INFO L93 Difference]: Finished difference Result 22359 states and 31053 transitions. [2020-10-27 16:12:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 16:12:52,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1693 [2020-10-27 16:12:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:12:52,257 INFO L225 Difference]: With dead ends: 22359 [2020-10-27 16:12:52,257 INFO L226 Difference]: Without dead ends: 14799 [2020-10-27 16:12:52,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 16:12:52,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14799 states. [2020-10-27 16:12:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14799 to 14770. [2020-10-27 16:12:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14770 states. [2020-10-27 16:12:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14770 states to 14770 states and 19331 transitions. [2020-10-27 16:12:52,674 INFO L78 Accepts]: Start accepts. Automaton has 14770 states and 19331 transitions. Word has length 1693 [2020-10-27 16:12:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:12:52,675 INFO L481 AbstractCegarLoop]: Abstraction has 14770 states and 19331 transitions. [2020-10-27 16:12:52,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:12:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 14770 states and 19331 transitions. [2020-10-27 16:12:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1701 [2020-10-27 16:12:52,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:12:52,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:12:52,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:12:52,748 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:12:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:12:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1523612224, now seen corresponding path program 1 times [2020-10-27 16:12:52,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:12:52,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117460603] [2020-10-27 16:12:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:12:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:12:53,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:12:54,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:12:54,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:12:58,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:12:58,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1726 [2020-10-27 16:12:58,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:12:58,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5188 [2020-10-27 16:12:58,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:12:58,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 16:12:58,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 16:12:58,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 979 [2020-10-27 16:12:58,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:13:01,366 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-27 16:13:01,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:13:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:13:01,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:13:01,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:13:01,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:13:01,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:13:01,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 16:13:01,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:13:01,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:13:01,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:13:01,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:13:01,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:13:01,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:13:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:13:01,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:13:01,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:13:01,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 16:13:01,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:13:01,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 16:13:01,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:13:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:13:01,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:13:01,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:13:01,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:13:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:13:17,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117460603] [2020-10-27 16:13:17,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:13:17,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 16:13:17,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459028486] [2020-10-27 16:13:17,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 16:13:17,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:13:17,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 16:13:17,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-27 16:13:17,389 INFO L87 Difference]: Start difference. First operand 14770 states and 19331 transitions. Second operand 21 states. [2020-10-27 16:13:17,828 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 16:13:18,023 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:13:24,103 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 16:13:24,311 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:13:25,273 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-27 16:13:27,425 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:13:29,071 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-27 16:13:30,961 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 16:13:31,146 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:13:34,048 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-27 16:13:37,351 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 16:13:37,914 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-27 16:13:38,171 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-27 16:13:44,640 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-27 16:13:44,916 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92