/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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:21:27,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:21:27,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:21:27,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:21:27,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:21:27,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:21:27,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:21:27,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:21:27,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:21:27,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:21:27,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:21:27,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:21:27,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:21:27,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:21:27,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:21:27,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:21:27,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:21:27,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:21:27,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:21:27,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:21:27,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:21:27,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:21:27,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:21:27,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:21:27,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:21:27,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:21:27,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:21:27,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:21:27,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:21:27,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:21:27,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:21:27,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:21:27,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:21:27,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:21:27,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:21:27,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:21:27,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:21:27,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:21:27,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:21:27,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:21:27,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:21:27,966 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 23:21:28,012 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:21:28,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:21:28,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:21:28,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:21:28,018 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:21:28,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:21:28,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:21:28,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:21:28,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:21:28,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:21:28,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:21:28,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:21:28,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:21:28,020 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:21:28,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:21:28,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:21:28,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:21:28,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:21:28,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:21:28,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:21:28,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:21:28,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:21:28,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:21:28,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:21:28,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:21:28,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:21:28,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:21:28,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:21:28,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:21:28,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:21:28,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:21:28,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:21:28,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:21:28,428 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:21:28,429 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:21:28,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:21:28,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25f49eada/4369f0a638724098897bbba1aba3b6b6/FLAGa612191cc [2020-10-27 23:21:29,163 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:21:29,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:21:29,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25f49eada/4369f0a638724098897bbba1aba3b6b6/FLAGa612191cc [2020-10-27 23:21:29,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25f49eada/4369f0a638724098897bbba1aba3b6b6 [2020-10-27 23:21:29,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:21:29,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:21:29,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:21:29,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:21:29,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:21:29,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:21:29" (1/1) ... [2020-10-27 23:21:29,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e930ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:29, skipping insertion in model container [2020-10-27 23:21:29,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:21:29" (1/1) ... [2020-10-27 23:21:29,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:21:29,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:21:29,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:21:29,958 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:21:30,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:21:30,065 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:21:30,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30 WrapperNode [2020-10-27 23:21:30,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:21:30,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:21:30,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:21:30,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:21:30,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30" (1/1) ... [2020-10-27 23:21:30,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30" (1/1) ... [2020-10-27 23:21:30,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30" (1/1) ... [2020-10-27 23:21:30,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30" (1/1) ... [2020-10-27 23:21:30,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30" (1/1) ... [2020-10-27 23:21:30,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30" (1/1) ... [2020-10-27 23:21:30,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30" (1/1) ... [2020-10-27 23:21:30,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:21:30,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:21:30,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:21:30,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:21:30,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30" (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 23:21:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:21:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:21:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:21:30,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:21:30,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:21:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:21:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:21:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:21:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:21:30,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:21:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:21:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:21:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:21:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:21:30,269 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:21:30,270 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:21:30,271 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:21:30,271 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:21:30,271 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:21:30,271 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:21:30,271 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:21:30,271 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:21:30,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:21:30,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:21:30,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:21:30,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:21:30,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:21:30,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:21:31,355 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:21:31,355 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:21:31,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:21:31 BoogieIcfgContainer [2020-10-27 23:21:31,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:21:31,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:21:31,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:21:31,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:21:31,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:21:29" (1/3) ... [2020-10-27 23:21:31,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc15d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:21:31, skipping insertion in model container [2020-10-27 23:21:31,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:21:30" (2/3) ... [2020-10-27 23:21:31,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc15d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:21:31, skipping insertion in model container [2020-10-27 23:21:31,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:21:31" (3/3) ... [2020-10-27 23:21:31,372 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:21:31,387 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:21:31,396 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:21:31,412 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:21:31,458 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:21:31,459 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:21:31,459 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:21:31,459 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:21:31,459 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:21:31,459 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:21:31,460 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:21:31,460 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:21:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-10-27 23:21:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:21:31,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:21:31,510 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] [2020-10-27 23:21:31,510 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:21:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:21:31,521 INFO L82 PathProgramCache]: Analyzing trace with hash -528114270, now seen corresponding path program 1 times [2020-10-27 23:21:31,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:21:31,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576803377] [2020-10-27 23:21:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:21:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:21:32,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:32,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:32,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:32,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:35,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:21:35,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:21:35,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:21:35,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3276 [2020-10-27 23:21:35,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:21:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:21:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 23:21:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:21:35,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:21:35,688 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:21:35,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:21:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:21:35,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:35,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:21:35,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:21:35,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:21:35,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:21:35,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:21:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:21:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:21:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:21:35,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:21:35,747 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 23:21:35,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576803377] [2020-10-27 23:21:35,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:21:35,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:21:35,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051247217] [2020-10-27 23:21:35,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:21:35,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:21:35,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:21:35,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:21:35,774 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 6 states. [2020-10-27 23:21:36,300 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:21:37,700 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:21:38,074 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:21:38,521 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:21:38,812 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:21:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:21:38,885 INFO L93 Difference]: Finished difference Result 663 states and 1110 transitions. [2020-10-27 23:21:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:21:38,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 23:21:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:21:38,909 INFO L225 Difference]: With dead ends: 663 [2020-10-27 23:21:38,909 INFO L226 Difference]: Without dead ends: 556 [2020-10-27 23:21:38,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:21:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-27 23:21:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 217. [2020-10-27 23:21:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 23:21:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 348 transitions. [2020-10-27 23:21:39,025 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 348 transitions. Word has length 55 [2020-10-27 23:21:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:21:39,026 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 348 transitions. [2020-10-27 23:21:39,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:21:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 348 transitions. [2020-10-27 23:21:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:21:39,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:21:39,030 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] [2020-10-27 23:21:39,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:21:39,035 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:21:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:21:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1101906423, now seen corresponding path program 1 times [2020-10-27 23:21:39,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:21:39,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571279536] [2020-10-27 23:21:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:21:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:21:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:39,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:39,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:39,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:39,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:43,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:21:43,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:21:43,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:21:43,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4091 [2020-10-27 23:21:43,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:21:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:21:43,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 23:21:43,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:21:43,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 23:21:43,575 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:21:43,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:21:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:21:43,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:43,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:21:43,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:21:43,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:21:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:21:43,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:21:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:21:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:21:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:21:43,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:21:43,616 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 23:21:43,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571279536] [2020-10-27 23:21:43,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:21:43,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:21:43,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121787037] [2020-10-27 23:21:43,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:21:43,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:21:43,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:21:43,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:21:43,620 INFO L87 Difference]: Start difference. First operand 217 states and 348 transitions. Second operand 7 states. [2020-10-27 23:21:44,009 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:21:45,160 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:21:45,555 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:21:45,910 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:21:46,295 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:21:46,705 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:21:47,365 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:21:47,840 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:21:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:21:47,851 INFO L93 Difference]: Finished difference Result 1381 states and 2289 transitions. [2020-10-27 23:21:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 23:21:47,851 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 23:21:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:21:47,859 INFO L225 Difference]: With dead ends: 1381 [2020-10-27 23:21:47,859 INFO L226 Difference]: Without dead ends: 1216 [2020-10-27 23:21:47,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-27 23:21:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2020-10-27 23:21:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 640. [2020-10-27 23:21:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-10-27 23:21:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1057 transitions. [2020-10-27 23:21:47,954 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1057 transitions. Word has length 56 [2020-10-27 23:21:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:21:47,954 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 1057 transitions. [2020-10-27 23:21:47,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:21:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1057 transitions. [2020-10-27 23:21:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:21:47,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:21:47,970 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] [2020-10-27 23:21:47,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:21:47,971 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:21:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:21:47,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1568295269, now seen corresponding path program 1 times [2020-10-27 23:21:47,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:21:47,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678093625] [2020-10-27 23:21:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:21:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:21:48,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:48,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:48,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:48,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:48,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:51,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:21:51,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:21:51,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:21:51,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3603 [2020-10-27 23:21:51,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:21:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:21:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 23:21:51,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:21:51,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:21:51,967 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:21:51,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:21:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:21:51,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:51,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:21:51,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:21:51,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:21:51,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:21:51,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:21:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:21:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:21:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:21:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:21:52,007 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 23:21:52,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678093625] [2020-10-27 23:21:52,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:21:52,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:21:52,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738154409] [2020-10-27 23:21:52,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:21:52,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:21:52,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:21:52,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:21:52,010 INFO L87 Difference]: Start difference. First operand 640 states and 1057 transitions. Second operand 5 states. [2020-10-27 23:21:52,333 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:21:53,289 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:21:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:21:53,426 INFO L93 Difference]: Finished difference Result 2258 states and 3769 transitions. [2020-10-27 23:21:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:21:53,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-27 23:21:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:21:53,437 INFO L225 Difference]: With dead ends: 2258 [2020-10-27 23:21:53,438 INFO L226 Difference]: Without dead ends: 1722 [2020-10-27 23:21:53,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:21:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2020-10-27 23:21:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1176. [2020-10-27 23:21:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1176 states. [2020-10-27 23:21:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1953 transitions. [2020-10-27 23:21:53,564 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1953 transitions. Word has length 57 [2020-10-27 23:21:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:21:53,565 INFO L481 AbstractCegarLoop]: Abstraction has 1176 states and 1953 transitions. [2020-10-27 23:21:53,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:21:53,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1953 transitions. [2020-10-27 23:21:53,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 23:21:53,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:21:53,567 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] [2020-10-27 23:21:53,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:21:53,567 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:21:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:21:53,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1294818402, now seen corresponding path program 1 times [2020-10-27 23:21:53,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:21:53,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786951578] [2020-10-27 23:21:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:21:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:21:53,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:53,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:53,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:53,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:53,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:56,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:21:56,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 23:21:56,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:21:56,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2785 [2020-10-27 23:21:56,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:21:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:21:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 23:21:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:21:56,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:21:56,710 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:21:56,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:21:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:21:56,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:56,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:21:56,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:21:56,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:21:56,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:21:56,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:21:56,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:21:56,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:21:56,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:21:56,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:21:56,743 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 23:21:56,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786951578] [2020-10-27 23:21:56,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:21:56,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:21:56,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344414217] [2020-10-27 23:21:56,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:21:56,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:21:56,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:21:56,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:21:56,747 INFO L87 Difference]: Start difference. First operand 1176 states and 1953 transitions. Second operand 5 states. [2020-10-27 23:21:57,072 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:21:58,016 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:21:58,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:21:58,264 INFO L93 Difference]: Finished difference Result 4362 states and 7281 transitions. [2020-10-27 23:21:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:21:58,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-27 23:21:58,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:21:58,285 INFO L225 Difference]: With dead ends: 4362 [2020-10-27 23:21:58,286 INFO L226 Difference]: Without dead ends: 3300 [2020-10-27 23:21:58,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:21:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2020-10-27 23:21:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 2221. [2020-10-27 23:21:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2221 states. [2020-10-27 23:21:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 3691 transitions. [2020-10-27 23:21:58,510 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 3691 transitions. Word has length 58 [2020-10-27 23:21:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:21:58,512 INFO L481 AbstractCegarLoop]: Abstraction has 2221 states and 3691 transitions. [2020-10-27 23:21:58,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:21:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 3691 transitions. [2020-10-27 23:21:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:21:58,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:21:58,515 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] [2020-10-27 23:21:58,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:21:58,516 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:21:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:21:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash 327351611, now seen corresponding path program 1 times [2020-10-27 23:21:58,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:21:58,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537074674] [2020-10-27 23:21:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:21:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:21:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:58,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:58,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:58,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:58,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:59,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:21:59,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:00,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:03,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:03,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:22:03,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:22:03,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 23:22:03,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:03,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:22:03,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 23:22:03,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:22:03,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:03,945 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:22:03,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:03,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:03,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:03,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:03,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:03,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:22:03,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:03,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:03,992 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 23:22:03,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537074674] [2020-10-27 23:22:03,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:03,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:22:03,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62721205] [2020-10-27 23:22:03,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:22:03,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:22:03,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:22:03,994 INFO L87 Difference]: Start difference. First operand 2221 states and 3691 transitions. Second operand 5 states. [2020-10-27 23:22:05,174 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:22:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:05,642 INFO L93 Difference]: Finished difference Result 6196 states and 10320 transitions. [2020-10-27 23:22:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:22:05,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-27 23:22:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:05,666 INFO L225 Difference]: With dead ends: 6196 [2020-10-27 23:22:05,667 INFO L226 Difference]: Without dead ends: 4078 [2020-10-27 23:22:05,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:22:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2020-10-27 23:22:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 4019. [2020-10-27 23:22:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-10-27 23:22:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 6643 transitions. [2020-10-27 23:22:06,031 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 6643 transitions. Word has length 60 [2020-10-27 23:22:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:06,031 INFO L481 AbstractCegarLoop]: Abstraction has 4019 states and 6643 transitions. [2020-10-27 23:22:06,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:22:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 6643 transitions. [2020-10-27 23:22:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:22:06,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:06,033 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] [2020-10-27 23:22:06,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:22:06,033 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash -742405393, now seen corresponding path program 1 times [2020-10-27 23:22:06,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:06,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580574686] [2020-10-27 23:22:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:06,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:06,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:06,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:06,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:06,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:07,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:07,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:11,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:11,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:22:11,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:22:11,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:22:11,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:22:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:22:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 23:22:11,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:11,453 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:22:11,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:11,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:11,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:11,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:11,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:11,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:22:11,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:11,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:11,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:11,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:11,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:11,508 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 23:22:11,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580574686] [2020-10-27 23:22:11,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:11,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:22:11,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296318707] [2020-10-27 23:22:11,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:22:11,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:11,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:22:11,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:22:11,513 INFO L87 Difference]: Start difference. First operand 4019 states and 6643 transitions. Second operand 4 states. [2020-10-27 23:22:11,833 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:22:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:13,084 INFO L93 Difference]: Finished difference Result 10980 states and 18220 transitions. [2020-10-27 23:22:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:22:13,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 23:22:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:13,124 INFO L225 Difference]: With dead ends: 10980 [2020-10-27 23:22:13,124 INFO L226 Difference]: Without dead ends: 7047 [2020-10-27 23:22:13,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:22:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2020-10-27 23:22:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 7044. [2020-10-27 23:22:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7044 states. [2020-10-27 23:22:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7044 states to 7044 states and 11644 transitions. [2020-10-27 23:22:13,701 INFO L78 Accepts]: Start accepts. Automaton has 7044 states and 11644 transitions. Word has length 60 [2020-10-27 23:22:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:13,702 INFO L481 AbstractCegarLoop]: Abstraction has 7044 states and 11644 transitions. [2020-10-27 23:22:13,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:22:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7044 states and 11644 transitions. [2020-10-27 23:22:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:22:13,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:13,703 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] [2020-10-27 23:22:13,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:22:13,704 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:13,705 INFO L82 PathProgramCache]: Analyzing trace with hash -163979150, now seen corresponding path program 1 times [2020-10-27 23:22:13,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:13,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255748136] [2020-10-27 23:22:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:13,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:13,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:13,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:13,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:14,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:15,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:15,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:22:15,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:22:15,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-27 23:22:15,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:22:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 23:22:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 23:22:15,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:15,489 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:22:15,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:15,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:15,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:15,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:15,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:15,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:22:15,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:15,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:15,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:15,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:15,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:15,538 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 23:22:15,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255748136] [2020-10-27 23:22:15,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:15,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:22:15,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709698920] [2020-10-27 23:22:15,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:22:15,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:15,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:22:15,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:22:15,541 INFO L87 Difference]: Start difference. First operand 7044 states and 11644 transitions. Second operand 4 states. [2020-10-27 23:22:16,550 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:22:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:17,583 INFO L93 Difference]: Finished difference Result 18694 states and 30687 transitions. [2020-10-27 23:22:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:22:17,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 23:22:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:17,654 INFO L225 Difference]: With dead ends: 18694 [2020-10-27 23:22:17,654 INFO L226 Difference]: Without dead ends: 11745 [2020-10-27 23:22:17,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:22:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11745 states. [2020-10-27 23:22:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11745 to 11517. [2020-10-27 23:22:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11517 states. [2020-10-27 23:22:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11517 states to 11517 states and 18542 transitions. [2020-10-27 23:22:18,576 INFO L78 Accepts]: Start accepts. Automaton has 11517 states and 18542 transitions. Word has length 60 [2020-10-27 23:22:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:18,576 INFO L481 AbstractCegarLoop]: Abstraction has 11517 states and 18542 transitions. [2020-10-27 23:22:18,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:22:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 11517 states and 18542 transitions. [2020-10-27 23:22:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:22:18,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:18,578 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] [2020-10-27 23:22:18,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:22:18,578 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:18,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash 63945101, now seen corresponding path program 1 times [2020-10-27 23:22:18,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:18,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099275135] [2020-10-27 23:22:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:18,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:18,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:18,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:18,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:19,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:19,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:19,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:23,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:23,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:22:23,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:22:23,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:22:23,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:23,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:22:23,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 23:22:23,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:22:23,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:23,996 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:22:23,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:24,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:24,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:24,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:24,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 23:22:24,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:24,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:24,049 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 23:22:24,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099275135] [2020-10-27 23:22:24,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:24,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:22:24,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129350150] [2020-10-27 23:22:24,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:22:24,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:22:24,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:22:24,055 INFO L87 Difference]: Start difference. First operand 11517 states and 18542 transitions. Second operand 5 states. [2020-10-27 23:22:25,104 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:22:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:26,466 INFO L93 Difference]: Finished difference Result 32201 states and 51708 transitions. [2020-10-27 23:22:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:22:26,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-27 23:22:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:26,521 INFO L225 Difference]: With dead ends: 32201 [2020-10-27 23:22:26,522 INFO L226 Difference]: Without dead ends: 20800 [2020-10-27 23:22:26,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:22:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20800 states. [2020-10-27 23:22:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20800 to 20337. [2020-10-27 23:22:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20337 states. [2020-10-27 23:22:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20337 states to 20337 states and 32198 transitions. [2020-10-27 23:22:27,913 INFO L78 Accepts]: Start accepts. Automaton has 20337 states and 32198 transitions. Word has length 60 [2020-10-27 23:22:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:27,914 INFO L481 AbstractCegarLoop]: Abstraction has 20337 states and 32198 transitions. [2020-10-27 23:22:27,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:22:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 20337 states and 32198 transitions. [2020-10-27 23:22:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:22:27,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:27,915 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] [2020-10-27 23:22:27,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:22:27,916 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:27,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1855949692, now seen corresponding path program 1 times [2020-10-27 23:22:27,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:27,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105491218] [2020-10-27 23:22:27,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:27,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:27,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:28,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:28,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:28,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:28,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:32,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:32,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:22:32,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:22:32,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 23:22:32,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:32,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:22:32,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 23:22:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 23:22:32,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:33,308 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:22:33,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:33,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:33,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:33,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:33,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:33,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:22:33,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:33,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:33,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:33,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:33,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:33,339 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 23:22:33,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105491218] [2020-10-27 23:22:33,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:33,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:22:33,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948967522] [2020-10-27 23:22:33,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:22:33,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:22:33,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:22:33,341 INFO L87 Difference]: Start difference. First operand 20337 states and 32198 transitions. Second operand 4 states. [2020-10-27 23:22:33,677 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:22:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:36,183 INFO L93 Difference]: Finished difference Result 54167 states and 85706 transitions. [2020-10-27 23:22:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:22:36,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 23:22:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:36,268 INFO L225 Difference]: With dead ends: 54167 [2020-10-27 23:22:36,268 INFO L226 Difference]: Without dead ends: 33932 [2020-10-27 23:22:36,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:22:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33932 states. [2020-10-27 23:22:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33932 to 33879. [2020-10-27 23:22:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33879 states. [2020-10-27 23:22:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33879 states to 33879 states and 53128 transitions. [2020-10-27 23:22:38,679 INFO L78 Accepts]: Start accepts. Automaton has 33879 states and 53128 transitions. Word has length 60 [2020-10-27 23:22:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:38,680 INFO L481 AbstractCegarLoop]: Abstraction has 33879 states and 53128 transitions. [2020-10-27 23:22:38,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:22:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand 33879 states and 53128 transitions. [2020-10-27 23:22:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:22:38,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:38,681 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] [2020-10-27 23:22:38,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:22:38,681 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:38,681 INFO L82 PathProgramCache]: Analyzing trace with hash 165161613, now seen corresponding path program 1 times [2020-10-27 23:22:38,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:38,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13865887] [2020-10-27 23:22:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:38,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:38,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:38,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:38,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:38,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:39,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:43,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:43,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:22:43,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:22:43,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:22:43,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:43,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:22:43,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 23:22:43,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:22:43,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:44,056 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:22:44,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:44,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:44,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:44,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:44,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:44,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:22:44,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:44,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:44,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:44,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:44,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:44,086 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 23:22:44,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13865887] [2020-10-27 23:22:44,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:44,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:22:44,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945039834] [2020-10-27 23:22:44,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:22:44,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:44,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:22:44,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:22:44,088 INFO L87 Difference]: Start difference. First operand 33879 states and 53128 transitions. Second operand 5 states. [2020-10-27 23:22:45,272 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:22:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:49,016 INFO L93 Difference]: Finished difference Result 95389 states and 149116 transitions. [2020-10-27 23:22:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:22:49,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-27 23:22:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:49,149 INFO L225 Difference]: With dead ends: 95389 [2020-10-27 23:22:49,150 INFO L226 Difference]: Without dead ends: 61562 [2020-10-27 23:22:49,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:22:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61562 states. [2020-10-27 23:22:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61562 to 36823. [2020-10-27 23:22:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36823 states. [2020-10-27 23:22:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36823 states to 36823 states and 57864 transitions. [2020-10-27 23:22:52,080 INFO L78 Accepts]: Start accepts. Automaton has 36823 states and 57864 transitions. Word has length 60 [2020-10-27 23:22:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:52,081 INFO L481 AbstractCegarLoop]: Abstraction has 36823 states and 57864 transitions. [2020-10-27 23:22:52,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:22:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand 36823 states and 57864 transitions. [2020-10-27 23:22:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:22:52,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:52,082 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] [2020-10-27 23:22:52,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:22:52,082 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1534880906, now seen corresponding path program 1 times [2020-10-27 23:22:52,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:52,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717312578] [2020-10-27 23:22:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:52,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:52,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:52,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:52,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:53,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:53,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:57,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:57,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:22:57,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:22:57,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:22:57,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:57,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:22:57,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 23:22:57,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:22:57,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:57,430 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:22:57,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:57,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:57,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:57,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:57,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:57,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:22:57,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:57,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:57,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:57,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:57,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:22:57,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717312578] [2020-10-27 23:22:57,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:57,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:22:57,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11881665] [2020-10-27 23:22:57,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:22:57,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:22:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:22:57,459 INFO L87 Difference]: Start difference. First operand 36823 states and 57864 transitions. Second operand 4 states. [2020-10-27 23:22:57,814 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:23:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:02,360 INFO L93 Difference]: Finished difference Result 97117 states and 152332 transitions. [2020-10-27 23:23:02,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:23:02,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 23:23:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:02,476 INFO L225 Difference]: With dead ends: 97117 [2020-10-27 23:23:02,476 INFO L226 Difference]: Without dead ends: 60346 [2020-10-27 23:23:02,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60346 states. [2020-10-27 23:23:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60346 to 60343. [2020-10-27 23:23:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60343 states. [2020-10-27 23:23:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60343 states to 60343 states and 93640 transitions. [2020-10-27 23:23:06,748 INFO L78 Accepts]: Start accepts. Automaton has 60343 states and 93640 transitions. Word has length 60 [2020-10-27 23:23:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:06,748 INFO L481 AbstractCegarLoop]: Abstraction has 60343 states and 93640 transitions. [2020-10-27 23:23:06,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:23:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 60343 states and 93640 transitions. [2020-10-27 23:23:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 23:23:06,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:06,749 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] [2020-10-27 23:23:06,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:23:06,749 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:06,754 INFO L82 PathProgramCache]: Analyzing trace with hash -615345527, now seen corresponding path program 1 times [2020-10-27 23:23:06,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:06,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372907411] [2020-10-27 23:23:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:06,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:06,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:06,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:06,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:07,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:07,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:07,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 23:23:07,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:23:07,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 729 [2020-10-27 23:23:07,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:23:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:23:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:23:07,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:07,832 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:23:07,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:07,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:07,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:07,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:07,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:07,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:23:07,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:07,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:07,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:07,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:07,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:07,857 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 23:23:07,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372907411] [2020-10-27 23:23:07,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:07,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:23:07,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296453886] [2020-10-27 23:23:07,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:23:07,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:23:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:23:07,859 INFO L87 Difference]: Start difference. First operand 60343 states and 93640 transitions. Second operand 4 states. [2020-10-27 23:23:08,213 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:23:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:13,212 INFO L93 Difference]: Finished difference Result 129699 states and 201315 transitions. [2020-10-27 23:23:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:23:13,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-27 23:23:13,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:13,341 INFO L225 Difference]: With dead ends: 129699 [2020-10-27 23:23:13,341 INFO L226 Difference]: Without dead ends: 69408 [2020-10-27 23:23:13,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69408 states. [2020-10-27 23:23:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69408 to 69181. [2020-10-27 23:23:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69181 states. [2020-10-27 23:23:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69181 states to 69181 states and 107071 transitions. [2020-10-27 23:23:18,233 INFO L78 Accepts]: Start accepts. Automaton has 69181 states and 107071 transitions. Word has length 61 [2020-10-27 23:23:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:18,234 INFO L481 AbstractCegarLoop]: Abstraction has 69181 states and 107071 transitions. [2020-10-27 23:23:18,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:23:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 69181 states and 107071 transitions. [2020-10-27 23:23:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 23:23:18,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:18,235 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] [2020-10-27 23:23:18,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:23:18,235 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:18,236 INFO L82 PathProgramCache]: Analyzing trace with hash -447590660, now seen corresponding path program 1 times [2020-10-27 23:23:18,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:18,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782098251] [2020-10-27 23:23:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:18,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:18,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:18,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:18,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:18,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:18,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:19,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:19,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 23:23:19,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:23:19,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1541 [2020-10-27 23:23:19,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:19,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:23:19,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 23:23:19,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:23:19,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:20,118 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:23:20,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:20,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:20,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:20,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:20,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:20,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:23:20,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:20,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:20,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:20,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:20,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:20,146 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 23:23:20,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782098251] [2020-10-27 23:23:20,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:20,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:23:20,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159539797] [2020-10-27 23:23:20,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:23:20,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:20,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:23:20,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:23:20,148 INFO L87 Difference]: Start difference. First operand 69181 states and 107071 transitions. Second operand 4 states. [2020-10-27 23:23:20,487 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:23:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:26,135 INFO L93 Difference]: Finished difference Result 148580 states and 230019 transitions. [2020-10-27 23:23:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:23:26,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-27 23:23:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:26,253 INFO L225 Difference]: With dead ends: 148580 [2020-10-27 23:23:26,253 INFO L226 Difference]: Without dead ends: 79489 [2020-10-27 23:23:26,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:26,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79489 states. [2020-10-27 23:23:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79489 to 79234. [2020-10-27 23:23:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79234 states. [2020-10-27 23:23:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79234 states to 79234 states and 122317 transitions. [2020-10-27 23:23:31,684 INFO L78 Accepts]: Start accepts. Automaton has 79234 states and 122317 transitions. Word has length 63 [2020-10-27 23:23:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:31,684 INFO L481 AbstractCegarLoop]: Abstraction has 79234 states and 122317 transitions. [2020-10-27 23:23:31,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:23:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 79234 states and 122317 transitions. [2020-10-27 23:23:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:23:31,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:31,685 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] [2020-10-27 23:23:31,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:23:31,685 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:31,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1175366377, now seen corresponding path program 1 times [2020-10-27 23:23:31,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:31,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264989578] [2020-10-27 23:23:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:31,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:31,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:31,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:31,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:32,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:32,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:33,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:35,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:35,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:23:35,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:23:35,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3853 [2020-10-27 23:23:35,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:35,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:23:35,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 23:23:35,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:23:35,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:35,859 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:23:35,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:35,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:35,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:35,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:35,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:23:35,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:35,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:35,885 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 23:23:35,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264989578] [2020-10-27 23:23:35,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:35,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:23:35,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418331970] [2020-10-27 23:23:35,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:23:35,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:23:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:23:35,887 INFO L87 Difference]: Start difference. First operand 79234 states and 122317 transitions. Second operand 4 states. [2020-10-27 23:23:36,224 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:23:42,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:42,452 INFO L93 Difference]: Finished difference Result 169323 states and 261919 transitions. [2020-10-27 23:23:42,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:23:42,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-27 23:23:42,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:42,594 INFO L225 Difference]: With dead ends: 169323 [2020-10-27 23:23:42,594 INFO L226 Difference]: Without dead ends: 90168 [2020-10-27 23:23:42,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90168 states. [2020-10-27 23:23:48,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90168 to 89916. [2020-10-27 23:23:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89916 states. [2020-10-27 23:23:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89916 states to 89916 states and 138302 transitions. [2020-10-27 23:23:48,725 INFO L78 Accepts]: Start accepts. Automaton has 89916 states and 138302 transitions. Word has length 65 [2020-10-27 23:23:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:48,725 INFO L481 AbstractCegarLoop]: Abstraction has 89916 states and 138302 transitions. [2020-10-27 23:23:48,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:23:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 89916 states and 138302 transitions. [2020-10-27 23:23:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:23:48,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:48,726 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] [2020-10-27 23:23:48,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:23:48,726 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash 883663103, now seen corresponding path program 1 times [2020-10-27 23:23:48,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:48,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985290201] [2020-10-27 23:23:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:48,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:48,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:49,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:49,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:49,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:49,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:53,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:53,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:23:53,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:23:53,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:23:53,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:53,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:23:53,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 23:23:53,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:23:53,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:54,136 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:23:54,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:54,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:54,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:54,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:54,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:54,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:23:54,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:54,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:54,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:54,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:54,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:54,174 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 23:23:54,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985290201] [2020-10-27 23:23:54,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:54,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:23:54,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538596124] [2020-10-27 23:23:54,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:23:54,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:23:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:23:54,176 INFO L87 Difference]: Start difference. First operand 89916 states and 138302 transitions. Second operand 6 states. [2020-10-27 23:23:54,588 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 23:23:55,642 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:23:55,998 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:23:56,572 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:24:00,125 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:24:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:08,380 INFO L93 Difference]: Finished difference Result 264003 states and 406759 transitions. [2020-10-27 23:24:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:24:08,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 23:24:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:08,683 INFO L225 Difference]: With dead ends: 264003 [2020-10-27 23:24:08,683 INFO L226 Difference]: Without dead ends: 174166 [2020-10-27 23:24:08,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:24:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174166 states. [2020-10-27 23:24:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174166 to 89916. [2020-10-27 23:24:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89916 states. [2020-10-27 23:24:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89916 states to 89916 states and 137841 transitions. [2020-10-27 23:24:16,440 INFO L78 Accepts]: Start accepts. Automaton has 89916 states and 137841 transitions. Word has length 66 [2020-10-27 23:24:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:16,440 INFO L481 AbstractCegarLoop]: Abstraction has 89916 states and 137841 transitions. [2020-10-27 23:24:16,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:24:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 89916 states and 137841 transitions. [2020-10-27 23:24:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:24:16,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:16,441 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] [2020-10-27 23:24:16,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:24:16,441 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:16,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1936030045, now seen corresponding path program 1 times [2020-10-27 23:24:16,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:16,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126181479] [2020-10-27 23:24:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:16,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:17,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:21,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:21,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:24:21,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:24:21,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:24:21,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:21,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:24:21,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 23:24:21,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:24:21,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:21,842 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:24:21,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:21,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:21,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:21,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:21,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:21,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:24:21,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:21,884 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 23:24:21,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126181479] [2020-10-27 23:24:21,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:21,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:24:21,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828303832] [2020-10-27 23:24:21,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:24:21,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:24:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:24:21,887 INFO L87 Difference]: Start difference. First operand 89916 states and 137841 transitions. Second operand 6 states. [2020-10-27 23:24:22,276 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 23:24:23,337 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:24:23,724 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:24:24,277 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:24:30,771 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:24:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:49,345 INFO L93 Difference]: Finished difference Result 415251 states and 638657 transitions. [2020-10-27 23:24:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:24:49,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-27 23:24:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:49,951 INFO L225 Difference]: With dead ends: 415251 [2020-10-27 23:24:49,951 INFO L226 Difference]: Without dead ends: 325414 [2020-10-27 23:24:50,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:24:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325414 states.