/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/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:33:11,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:33:11,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:33:11,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:33:11,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:33:11,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:33:11,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:33:11,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:33:11,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:33:11,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:33:11,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:33:11,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:33:11,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:33:11,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:33:11,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:33:11,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:33:11,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:33:11,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:33:11,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:33:11,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:33:11,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:33:11,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:33:11,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:33:11,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:33:11,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:33:11,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:33:11,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:33:11,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:33:11,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:33:11,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:33:11,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:33:11,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:33:11,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:33:11,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:33:11,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:33:11,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:33:11,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:33:11,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:33:11,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:33:11,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:33:11,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:33:11,748 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 23:33:11,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:33:11,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:33:11,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:33:11,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:33:11,780 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:33:11,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:33:11,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:33:11,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:33:11,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:33:11,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:33:11,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:33:11,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:33:11,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:33:11,782 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:33:11,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:33:11,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:33:11,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:33:11,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:33:11,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:33:11,783 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:33:11,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:33:11,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:33:11,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:33:11,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:33:11,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:33:11,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:33:11,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:33:11,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:33:11,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:33:11,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:33:12,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:33:12,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:33:12,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:33:12,234 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:33:12,234 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:33:12,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 23:33:12,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cf23cfb2/2998f23fedbd4c249a81d9d379d3f1cf/FLAG3e1407660 [2020-10-27 23:33:13,222 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:33:13,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 23:33:13,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cf23cfb2/2998f23fedbd4c249a81d9d379d3f1cf/FLAG3e1407660 [2020-10-27 23:33:13,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cf23cfb2/2998f23fedbd4c249a81d9d379d3f1cf [2020-10-27 23:33:13,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:33:13,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:33:13,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:33:13,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:33:13,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:33:13,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:33:13" (1/1) ... [2020-10-27 23:33:13,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53cc3f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:13, skipping insertion in model container [2020-10-27 23:33:13,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:33:13" (1/1) ... [2020-10-27 23:33:13,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:33:13,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:33:14,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:33:14,828 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:33:15,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:33:15,580 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:33:15,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15 WrapperNode [2020-10-27 23:33:15,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:33:15,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:33:15,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:33:15,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:33:15,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15" (1/1) ... [2020-10-27 23:33:15,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15" (1/1) ... [2020-10-27 23:33:15,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15" (1/1) ... [2020-10-27 23:33:15,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15" (1/1) ... [2020-10-27 23:33:15,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15" (1/1) ... [2020-10-27 23:33:15,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15" (1/1) ... [2020-10-27 23:33:15,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15" (1/1) ... [2020-10-27 23:33:15,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:33:15,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:33:15,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:33:15,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:33:15,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15" (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 23:33:15,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:33:15,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:33:15,944 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:33:15,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:33:15,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:33:15,946 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:33:15,946 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:33:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:33:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:33:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:33:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:33:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:33:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:33:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:33:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:33:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:33:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:33:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:33:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:33:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:33:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:33:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:33:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:33:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:33:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:33:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:33:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:33:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:33:18,965 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:33:18,966 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:33:18,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:33:18 BoogieIcfgContainer [2020-10-27 23:33:18,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:33:18,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:33:18,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:33:18,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:33:18,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:33:13" (1/3) ... [2020-10-27 23:33:18,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a9b599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:33:18, skipping insertion in model container [2020-10-27 23:33:18,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:33:15" (2/3) ... [2020-10-27 23:33:18,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a9b599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:33:18, skipping insertion in model container [2020-10-27 23:33:18,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:33:18" (3/3) ... [2020-10-27 23:33:18,986 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 23:33:18,998 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:33:19,004 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:33:19,018 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:33:19,064 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:33:19,064 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:33:19,064 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:33:19,065 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:33:19,065 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:33:19,065 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:33:19,065 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:33:19,065 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:33:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states. [2020-10-27 23:33:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-27 23:33:19,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:19,152 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, 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 23:33:19,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:19,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1702593958, now seen corresponding path program 1 times [2020-10-27 23:33:19,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:19,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507466062] [2020-10-27 23:33:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:19,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:20,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:21,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:21,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:21,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:22,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:22,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:22,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:23,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:23,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:23,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:24,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-27 23:33:24,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:33:24,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 23:33:24,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:24,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:33:24,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-27 23:33:24,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-27 23:33:24,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:33:25,716 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:33:25,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:25,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:25,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:25,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:25,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:25,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 23:33:25,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:25,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:33:25,983 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 23:33:25,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507466062] [2020-10-27 23:33:25,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:25,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:33:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701908145] [2020-10-27 23:33:25,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:33:25,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:26,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:33:26,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:33:26,013 INFO L87 Difference]: Start difference. First operand 898 states. Second operand 4 states. [2020-10-27 23:33:26,961 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-27 23:33:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:35,136 INFO L93 Difference]: Finished difference Result 1547 states and 2790 transitions. [2020-10-27 23:33:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:33:35,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-10-27 23:33:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:35,181 INFO L225 Difference]: With dead ends: 1547 [2020-10-27 23:33:35,181 INFO L226 Difference]: Without dead ends: 1297 [2020-10-27 23:33:35,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2020-10-27 23:33:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1294. [2020-10-27 23:33:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1294 states. [2020-10-27 23:33:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2002 transitions. [2020-10-27 23:33:35,390 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2002 transitions. Word has length 299 [2020-10-27 23:33:35,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:35,396 INFO L481 AbstractCegarLoop]: Abstraction has 1294 states and 2002 transitions. [2020-10-27 23:33:35,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:33:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2002 transitions. [2020-10-27 23:33:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-27 23:33:35,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:35,413 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, 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 23:33:35,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:33:35,415 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash 590406428, now seen corresponding path program 1 times [2020-10-27 23:33:35,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:35,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623099486] [2020-10-27 23:33:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:35,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:35,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:36,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:36,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:36,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:37,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:37,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:37,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:37,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:38,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:38,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:38,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:40,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-27 23:33:40,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:33:40,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 23:33:40,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:40,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:33:40,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 23:33:40,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-27 23:33:40,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:41,818 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:33:41,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:41,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:41,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:41,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:41,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:41,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 23:33:41,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:41,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:41,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:41,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:41,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:42,096 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 23:33:42,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623099486] [2020-10-27 23:33:42,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:42,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:33:42,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661541935] [2020-10-27 23:33:42,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:33:42,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:42,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:33:42,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:33:42,114 INFO L87 Difference]: Start difference. First operand 1294 states and 2002 transitions. Second operand 4 states. [2020-10-27 23:33:43,016 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-27 23:33:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:50,028 INFO L93 Difference]: Finished difference Result 2495 states and 3903 transitions. [2020-10-27 23:33:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:33:50,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-10-27 23:33:50,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:50,045 INFO L225 Difference]: With dead ends: 2495 [2020-10-27 23:33:50,045 INFO L226 Difference]: Without dead ends: 2181 [2020-10-27 23:33:50,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:50,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-10-27 23:33:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2178. [2020-10-27 23:33:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2178 states. [2020-10-27 23:33:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 3387 transitions. [2020-10-27 23:33:50,141 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 3387 transitions. Word has length 299 [2020-10-27 23:33:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:50,142 INFO L481 AbstractCegarLoop]: Abstraction has 2178 states and 3387 transitions. [2020-10-27 23:33:50,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:33:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 3387 transitions. [2020-10-27 23:33:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-27 23:33:50,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:50,150 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, 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 23:33:50,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:33:50,151 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash 579909363, now seen corresponding path program 1 times [2020-10-27 23:33:50,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:50,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815000846] [2020-10-27 23:33:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:50,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:50,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:51,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:51,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:51,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:51,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:52,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:52,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:52,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:52,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:53,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:53,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:55,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:55,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-27 23:33:55,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:33:55,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 23:33:55,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:55,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:33:55,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:33:55,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 23:33:55,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:33:56,588 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:33:56,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:56,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:56,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:56,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:56,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:56,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 23:33:56,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:56,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:33:56,789 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 23:33:56,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815000846] [2020-10-27 23:33:56,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:56,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:33:56,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42071332] [2020-10-27 23:33:56,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:33:56,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:56,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:33:56,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:56,792 INFO L87 Difference]: Start difference. First operand 2178 states and 3387 transitions. Second operand 5 states. [2020-10-27 23:34:05,529 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 23:34:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:34:07,931 INFO L93 Difference]: Finished difference Result 6453 states and 10030 transitions. [2020-10-27 23:34:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:34:07,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 299 [2020-10-27 23:34:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:34:07,968 INFO L225 Difference]: With dead ends: 6453 [2020-10-27 23:34:07,969 INFO L226 Difference]: Without dead ends: 4290 [2020-10-27 23:34:07,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:34:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2020-10-27 23:34:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 4132. [2020-10-27 23:34:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4132 states. [2020-10-27 23:34:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 6399 transitions. [2020-10-27 23:34:08,157 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 6399 transitions. Word has length 299 [2020-10-27 23:34:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:34:08,158 INFO L481 AbstractCegarLoop]: Abstraction has 4132 states and 6399 transitions. [2020-10-27 23:34:08,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:34:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 6399 transitions. [2020-10-27 23:34:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-27 23:34:08,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:34:08,169 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, 1, 1, 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 23:34:08,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:34:08,170 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:34:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:34:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash -99204952, now seen corresponding path program 1 times [2020-10-27 23:34:08,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:34:08,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227187967] [2020-10-27 23:34:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:34:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:08,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:08,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:08,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:09,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:09,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:09,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:09,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:09,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:09,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:10,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:12,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:13,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:13,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:13,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-27 23:34:13,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:34:13,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 23:34:13,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:13,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:34:13,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:34:13,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 23:34:13,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:14,197 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:34:14,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:14,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:14,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:14,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:14,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:14,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:34:14,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:14,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:14,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:14,394 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 23:34:14,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227187967] [2020-10-27 23:34:14,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:14,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:34:14,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888319133] [2020-10-27 23:34:14,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:34:14,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:34:14,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:34:14,398 INFO L87 Difference]: Start difference. First operand 4132 states and 6399 transitions. Second operand 4 states. [2020-10-27 23:34:23,719 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-27 23:34:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:34:25,934 INFO L93 Difference]: Finished difference Result 12115 states and 18725 transitions. [2020-10-27 23:34:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:34:25,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 301 [2020-10-27 23:34:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:34:25,968 INFO L225 Difference]: With dead ends: 12115 [2020-10-27 23:34:25,969 INFO L226 Difference]: Without dead ends: 8112 [2020-10-27 23:34:25,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:34:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8112 states. [2020-10-27 23:34:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8112 to 7954. [2020-10-27 23:34:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7954 states. [2020-10-27 23:34:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 12253 transitions. [2020-10-27 23:34:26,297 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 12253 transitions. Word has length 301 [2020-10-27 23:34:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:34:26,297 INFO L481 AbstractCegarLoop]: Abstraction has 7954 states and 12253 transitions. [2020-10-27 23:34:26,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:34:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 12253 transitions. [2020-10-27 23:34:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-27 23:34:26,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:34:26,315 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, 1, 1, 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 23:34:26,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:34:26,315 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:34:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:34:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash -468446845, now seen corresponding path program 1 times [2020-10-27 23:34:26,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:34:26,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554321206] [2020-10-27 23:34:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:34:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:26,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:26,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:26,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:26,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:27,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:27,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:27,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:27,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:27,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:27,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:31,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:31,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-27 23:34:31,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:34:31,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:34:31,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:34:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:34:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:34:31,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:32,388 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:34:32,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:32,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:32,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:32,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:34:32,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:32,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:32,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:32,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:32,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:32,517 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 23:34:32,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554321206] [2020-10-27 23:34:32,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:32,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:34:32,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182203270] [2020-10-27 23:34:32,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:34:32,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:32,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:34:32,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:34:32,519 INFO L87 Difference]: Start difference. First operand 7954 states and 12253 transitions. Second operand 4 states. [2020-10-27 23:34:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:34:43,499 INFO L93 Difference]: Finished difference Result 23783 states and 36628 transitions. [2020-10-27 23:34:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:34:43,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 301 [2020-10-27 23:34:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:34:43,558 INFO L225 Difference]: With dead ends: 23783 [2020-10-27 23:34:43,558 INFO L226 Difference]: Without dead ends: 15868 [2020-10-27 23:34:43,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:34:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15868 states. [2020-10-27 23:34:44,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15868 to 7968. [2020-10-27 23:34:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7968 states. [2020-10-27 23:34:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7968 states to 7968 states and 12270 transitions. [2020-10-27 23:34:44,105 INFO L78 Accepts]: Start accepts. Automaton has 7968 states and 12270 transitions. Word has length 301 [2020-10-27 23:34:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:34:44,106 INFO L481 AbstractCegarLoop]: Abstraction has 7968 states and 12270 transitions. [2020-10-27 23:34:44,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:34:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 7968 states and 12270 transitions. [2020-10-27 23:34:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-27 23:34:44,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:34:44,124 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, 1, 1, 1, 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 23:34:44,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:34:44,125 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:34:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:34:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -41983895, now seen corresponding path program 1 times [2020-10-27 23:34:44,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:34:44,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479465459] [2020-10-27 23:34:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:34:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:44,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:44,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:44,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:46,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:47,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:47,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:47,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:49,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:49,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-27 23:34:49,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:34:49,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:34:49,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:34:49,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:34:49,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:34:49,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:50,233 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:34:50,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:50,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:50,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:50,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:50,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:50,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 23:34:50,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:50,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:50,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:50,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:50,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:50,389 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 23:34:50,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479465459] [2020-10-27 23:34:50,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:50,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:34:50,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650825580] [2020-10-27 23:34:50,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:34:50,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:50,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:34:50,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:34:50,391 INFO L87 Difference]: Start difference. First operand 7968 states and 12270 transitions. Second operand 5 states. [2020-10-27 23:35:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:35:01,942 INFO L93 Difference]: Finished difference Result 23449 states and 36017 transitions. [2020-10-27 23:35:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:35:01,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2020-10-27 23:35:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:35:01,979 INFO L225 Difference]: With dead ends: 23449 [2020-10-27 23:35:01,979 INFO L226 Difference]: Without dead ends: 15787 [2020-10-27 23:35:01,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:35:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15787 states. [2020-10-27 23:35:02,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15787 to 8167. [2020-10-27 23:35:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8167 states. [2020-10-27 23:35:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 12612 transitions. [2020-10-27 23:35:02,525 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 12612 transitions. Word has length 302 [2020-10-27 23:35:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:35:02,525 INFO L481 AbstractCegarLoop]: Abstraction has 8167 states and 12612 transitions. [2020-10-27 23:35:02,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:35:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 12612 transitions. [2020-10-27 23:35:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-27 23:35:02,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:35:02,544 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, 1, 1, 1, 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 23:35:02,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:35:02,545 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:35:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:35:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1386330650, now seen corresponding path program 1 times [2020-10-27 23:35:02,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:35:02,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833641684] [2020-10-27 23:35:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:35:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:35:02,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:02,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:02,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:03,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:03,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:03,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:03,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:03,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:03,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:03,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:04,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:04,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:06,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:06,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:06,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:07,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:35:07,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-27 23:35:07,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:35:07,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-27 23:35:07,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:35:07,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:35:07,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:35:07,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 23:35:07,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:35:08,641 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:35:08,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:35:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:35:08,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:08,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:35:08,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:35:08,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:35:08,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:35:08,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:35:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:35:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:35:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:35:08,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:35:08,779 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 23:35:08,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833641684] [2020-10-27 23:35:08,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:35:08,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:35:08,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310864137] [2020-10-27 23:35:08,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:35:08,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:35:08,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:35:08,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:35:08,782 INFO L87 Difference]: Start difference. First operand 8167 states and 12612 transitions. Second operand 4 states. [2020-10-27 23:35:18,582 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-27 23:35:21,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:35:21,045 INFO L93 Difference]: Finished difference Result 23568 states and 36237 transitions. [2020-10-27 23:35:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:35:21,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 302 [2020-10-27 23:35:21,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:35:21,076 INFO L225 Difference]: With dead ends: 23568 [2020-10-27 23:35:21,076 INFO L226 Difference]: Without dead ends: 15790 [2020-10-27 23:35:21,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:35:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15790 states. [2020-10-27 23:35:22,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15790 to 15632. [2020-10-27 23:35:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15632 states. [2020-10-27 23:35:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15632 states to 15632 states and 23936 transitions. [2020-10-27 23:35:22,046 INFO L78 Accepts]: Start accepts. Automaton has 15632 states and 23936 transitions. Word has length 302 [2020-10-27 23:35:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:35:22,047 INFO L481 AbstractCegarLoop]: Abstraction has 15632 states and 23936 transitions. [2020-10-27 23:35:22,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:35:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 15632 states and 23936 transitions. [2020-10-27 23:35:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-27 23:35:22,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:35:22,077 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, 1, 1, 1, 1, 1, 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 23:35:22,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:35:22,077 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:35:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:35:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1909221405, now seen corresponding path program 1 times [2020-10-27 23:35:22,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:35:22,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458662] [2020-10-27 23:35:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:35:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:35:22,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:22,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:22,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:22,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:22,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:22,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:22,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:23,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:23,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:23,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:23,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:23,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:23,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:23,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:23,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:24,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:27,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:35:27,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 312 [2020-10-27 23:35:27,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:35:27,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:35:27,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:35:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:35:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 23:35:27,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:35:27,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:35:28,138 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:35:28,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:35:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:35:28,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:28,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:35:28,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:35:28,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:35:28,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:35:28,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:35:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:35:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:35:28,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:35:28,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:35:28,235 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 23:35:28,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458662] [2020-10-27 23:35:28,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:35:28,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:35:28,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943012039] [2020-10-27 23:35:28,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:35:28,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:35:28,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:35:28,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:35:28,238 INFO L87 Difference]: Start difference. First operand 15632 states and 23936 transitions. Second operand 4 states. [2020-10-27 23:35:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:35:39,925 INFO L93 Difference]: Finished difference Result 45398 states and 69200 transitions. [2020-10-27 23:35:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:35:39,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 304 [2020-10-27 23:35:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:35:39,985 INFO L225 Difference]: With dead ends: 45398 [2020-10-27 23:35:39,986 INFO L226 Difference]: Without dead ends: 30521 [2020-10-27 23:35:40,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:35:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30521 states. [2020-10-27 23:35:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30521 to 15729. [2020-10-27 23:35:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15729 states. [2020-10-27 23:35:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15729 states to 15729 states and 24062 transitions. [2020-10-27 23:35:41,146 INFO L78 Accepts]: Start accepts. Automaton has 15729 states and 24062 transitions. Word has length 304 [2020-10-27 23:35:41,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:35:41,146 INFO L481 AbstractCegarLoop]: Abstraction has 15729 states and 24062 transitions. [2020-10-27 23:35:41,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:35:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 15729 states and 24062 transitions. [2020-10-27 23:35:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-27 23:35:41,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:35:41,174 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, 1, 1, 1, 1, 1, 1, 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 23:35:41,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:35:41,175 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:35:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:35:41,175 INFO L82 PathProgramCache]: Analyzing trace with hash -238554457, now seen corresponding path program 1 times [2020-10-27 23:35:41,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:35:41,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479767571] [2020-10-27 23:35:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:35:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:35:41,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:41,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:41,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:41,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:41,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:41,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:41,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:42,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:42,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:42,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:42,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:42,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:43,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:43,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:43,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:43,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:46,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:35:46,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 23:35:46,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:35:46,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:35:46,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:35:46,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:35:46,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 23:35:46,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:35:46,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:35:47,223 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:35:47,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:35:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:35:47,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:47,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:35:47,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:35:47,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:35:47,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:35:47,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:35:47,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:35:47,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:35:47,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:35:47,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:35:47,356 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 23:35:47,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479767571] [2020-10-27 23:35:47,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:35:47,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:35:47,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083537937] [2020-10-27 23:35:47,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:35:47,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:35:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:35:47,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:35:47,359 INFO L87 Difference]: Start difference. First operand 15729 states and 24062 transitions. Second operand 5 states. [2020-10-27 23:35:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:35:54,038 INFO L93 Difference]: Finished difference Result 28887 states and 44027 transitions. [2020-10-27 23:35:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:35:54,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 305 [2020-10-27 23:35:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:35:54,059 INFO L225 Difference]: With dead ends: 28887 [2020-10-27 23:35:54,059 INFO L226 Difference]: Without dead ends: 13906 [2020-10-27 23:35:54,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:35:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13906 states. [2020-10-27 23:35:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13906 to 13892. [2020-10-27 23:35:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13892 states. [2020-10-27 23:35:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13892 states to 13892 states and 21228 transitions. [2020-10-27 23:35:54,977 INFO L78 Accepts]: Start accepts. Automaton has 13892 states and 21228 transitions. Word has length 305 [2020-10-27 23:35:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:35:54,978 INFO L481 AbstractCegarLoop]: Abstraction has 13892 states and 21228 transitions. [2020-10-27 23:35:54,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:35:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 13892 states and 21228 transitions. [2020-10-27 23:35:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-27 23:35:55,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:35:55,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:35:55,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:35:55,003 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:35:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:35:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1223899655, now seen corresponding path program 1 times [2020-10-27 23:35:55,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:35:55,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114872827] [2020-10-27 23:35:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:35:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:35:55,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:55,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:55,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:55,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:55,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:55,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:55,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:55,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:55,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:56,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:56,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:56,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:35:57,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:00,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:36:00,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-27 23:36:00,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:36:00,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:36:00,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:36:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:36:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 23:36:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-27 23:36:00,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:36:01,141 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:36:01,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:36:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:36:01,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:01,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:36:01,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:36:01,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:36:01,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:36:01,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:36:01,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:36:01,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:36:01,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:36:01,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:36:01,379 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 23:36:01,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114872827] [2020-10-27 23:36:01,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:36:01,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:36:01,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640291448] [2020-10-27 23:36:01,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:36:01,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:36:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:36:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:36:01,381 INFO L87 Difference]: Start difference. First operand 13892 states and 21228 transitions. Second operand 6 states. [2020-10-27 23:36:02,285 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-27 23:36:09,872 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-27 23:36:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:36:12,510 INFO L93 Difference]: Finished difference Result 28970 states and 44772 transitions. [2020-10-27 23:36:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:36:12,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 308 [2020-10-27 23:36:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:36:12,543 INFO L225 Difference]: With dead ends: 28970 [2020-10-27 23:36:12,543 INFO L226 Difference]: Without dead ends: 23882 [2020-10-27 23:36:12,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:36:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23882 states. [2020-10-27 23:36:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23882 to 23831. [2020-10-27 23:36:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23831 states. [2020-10-27 23:36:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23831 states to 23831 states and 36079 transitions. [2020-10-27 23:36:13,991 INFO L78 Accepts]: Start accepts. Automaton has 23831 states and 36079 transitions. Word has length 308 [2020-10-27 23:36:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:36:13,992 INFO L481 AbstractCegarLoop]: Abstraction has 23831 states and 36079 transitions. [2020-10-27 23:36:13,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:36:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 23831 states and 36079 transitions. [2020-10-27 23:36:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-27 23:36:14,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:36:14,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:14,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:36:14,032 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:36:14,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:36:14,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1347429846, now seen corresponding path program 1 times [2020-10-27 23:36:14,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:36:14,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557775525] [2020-10-27 23:36:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:36:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:36:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:14,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:15,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:16,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:19,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:36:19,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-27 23:36:19,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:36:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:36:19,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:36:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:36:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:36:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-27 23:36:19,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:36:20,202 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:36:20,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:36:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:36:20,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:20,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:36:20,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:36:20,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:36:20,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:36:20,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:36:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:36:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:36:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:36:20,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:36:20,452 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 23:36:20,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557775525] [2020-10-27 23:36:20,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:36:20,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:36:20,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234537310] [2020-10-27 23:36:20,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:36:20,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:36:20,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:36:20,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:36:20,454 INFO L87 Difference]: Start difference. First operand 23831 states and 36079 transitions. Second operand 5 states. [2020-10-27 23:36:32,343 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 23:36:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:36:36,384 INFO L93 Difference]: Finished difference Result 70254 states and 106214 transitions. [2020-10-27 23:36:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:36:36,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 308 [2020-10-27 23:36:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:36:36,432 INFO L225 Difference]: With dead ends: 70254 [2020-10-27 23:36:36,433 INFO L226 Difference]: Without dead ends: 46607 [2020-10-27 23:36:36,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:36:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46607 states. [2020-10-27 23:36:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46607 to 46477. [2020-10-27 23:36:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46477 states. [2020-10-27 23:36:39,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46477 states to 46477 states and 69837 transitions. [2020-10-27 23:36:39,415 INFO L78 Accepts]: Start accepts. Automaton has 46477 states and 69837 transitions. Word has length 308 [2020-10-27 23:36:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:36:39,415 INFO L481 AbstractCegarLoop]: Abstraction has 46477 states and 69837 transitions. [2020-10-27 23:36:39,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:36:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 46477 states and 69837 transitions. [2020-10-27 23:36:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-27 23:36:39,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:36:39,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:39,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:36:39,451 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:36:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:36:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1320780896, now seen corresponding path program 1 times [2020-10-27 23:36:39,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:36:39,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347715894] [2020-10-27 23:36:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:36:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:36:39,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:39,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:39,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:39,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:39,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:39,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:40,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:40,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:40,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:40,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:40,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:41,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:41,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:36:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking...