/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.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:22:19,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:22:19,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:22:19,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:22:19,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:22:19,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:22:19,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:22:19,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:22:19,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:22:19,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:22:19,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:22:19,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:22:19,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:22:19,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:22:19,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:22:19,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:22:19,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:22:19,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:22:19,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:22:19,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:22:19,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:22:19,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:22:19,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:22:19,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:22:19,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:22:19,530 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:22:19,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:22:19,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:22:19,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:22:19,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:22:19,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:22:19,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:22:19,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:22:19,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:22:19,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:22:19,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:22:19,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:22:19,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:22:19,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:22:19,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:22:19,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:22:19,548 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 23:22:19,624 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:22:19,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:22:19,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:22:19,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:22:19,631 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:22:19,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:22:19,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:22:19,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:22:19,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:22:19,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:22:19,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:22:19,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:22:19,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:22:19,635 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:22:19,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:22:19,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:22:19,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:22:19,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:22:19,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:22:19,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:22:19,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:22:19,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:22:19,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:22:19,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:22:19,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:22:19,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:22:19,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:22:19,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:22:19,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:22:19,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:22:20,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:22:20,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:22:20,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:22:20,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:22:20,091 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:22:20,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 23:22:20,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28d022cb8/934721f0073e4ba9aa5c08ab4b0583c0/FLAGa20f9b95f [2020-10-27 23:22:20,841 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:22:20,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 23:22:20,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28d022cb8/934721f0073e4ba9aa5c08ab4b0583c0/FLAGa20f9b95f [2020-10-27 23:22:21,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28d022cb8/934721f0073e4ba9aa5c08ab4b0583c0 [2020-10-27 23:22:21,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:22:21,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:22:21,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:22:21,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:22:21,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:22:21,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:22:21" (1/1) ... [2020-10-27 23:22:21,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788f2800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21, skipping insertion in model container [2020-10-27 23:22:21,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:22:21" (1/1) ... [2020-10-27 23:22:21,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:22:21,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:22:21,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:22:21,715 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:22:21,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:22:21,877 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:22:21,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21 WrapperNode [2020-10-27 23:22:21,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:22:21,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:22:21,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:22:21,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:22:21,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21" (1/1) ... [2020-10-27 23:22:21,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21" (1/1) ... [2020-10-27 23:22:21,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21" (1/1) ... [2020-10-27 23:22:21,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21" (1/1) ... [2020-10-27 23:22:21,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21" (1/1) ... [2020-10-27 23:22:21,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21" (1/1) ... [2020-10-27 23:22:21,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21" (1/1) ... [2020-10-27 23:22:21,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:22:21,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:22:21,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:22:21,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:22:21,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:22:22,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:22:22,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:22:22,082 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:22:22,083 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:22:22,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:22:22,083 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:22:22,083 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:22:22,083 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:22:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:22:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:22:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:22:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:22:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:22:22,084 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:22:22,085 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:22:22,085 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:22:22,085 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:22:22,085 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:22:22,085 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:22:22,085 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:22:22,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:22:22,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:22:22,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:22:22,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:22:22,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:22:22,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:22:22,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:22:23,320 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:22:23,321 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:22:23,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:22:23 BoogieIcfgContainer [2020-10-27 23:22:23,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:22:23,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:22:23,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:22:23,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:22:23,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:22:21" (1/3) ... [2020-10-27 23:22:23,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@859a7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:22:23, skipping insertion in model container [2020-10-27 23:22:23,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:22:21" (2/3) ... [2020-10-27 23:22:23,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@859a7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:22:23, skipping insertion in model container [2020-10-27 23:22:23,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:22:23" (3/3) ... [2020-10-27 23:22:23,334 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 23:22:23,351 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:22:23,358 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:22:23,377 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:22:23,414 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:22:23,414 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:22:23,414 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:22:23,414 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:22:23,415 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:22:23,415 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:22:23,415 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:22:23,415 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:22:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states. [2020-10-27 23:22:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 23:22:23,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:23,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:22:23,500 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:23,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:23,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1018272144, now seen corresponding path program 1 times [2020-10-27 23:22:23,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:23,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243346285] [2020-10-27 23:22:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:24,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:24,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:24,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:25,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:28,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:28,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:29,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:29,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 23:22:29,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:22:29,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 23:22:29,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:22:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:22:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 23:22:29,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:22:29,703 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:22:29,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:29,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:29,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:29,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:29,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 23:22:29,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:29,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:29,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:29,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:29,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:29,795 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 23:22:29,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243346285] [2020-10-27 23:22:29,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:29,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:22:29,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103404727] [2020-10-27 23:22:29,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:22:29,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:29,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:22:29,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:22:29,824 INFO L87 Difference]: Start difference. First operand 246 states. Second operand 5 states. [2020-10-27 23:22:31,833 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:22:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:32,708 INFO L93 Difference]: Finished difference Result 682 states and 1214 transitions. [2020-10-27 23:22:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:22:32,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2020-10-27 23:22:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:32,741 INFO L225 Difference]: With dead ends: 682 [2020-10-27 23:22:32,741 INFO L226 Difference]: Without dead ends: 453 [2020-10-27 23:22:32,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:22:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-27 23:22:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 435. [2020-10-27 23:22:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-27 23:22:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 634 transitions. [2020-10-27 23:22:32,857 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 634 transitions. Word has length 96 [2020-10-27 23:22:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:32,858 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 634 transitions. [2020-10-27 23:22:32,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:22:32,858 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 634 transitions. [2020-10-27 23:22:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 23:22:32,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:32,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:22:32,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:22:32,865 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:32,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:32,866 INFO L82 PathProgramCache]: Analyzing trace with hash -889227056, now seen corresponding path program 1 times [2020-10-27 23:22:32,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:32,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544816908] [2020-10-27 23:22:32,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:32,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:33,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:33,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:33,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:33,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:34,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:34,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:37,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:37,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 23:22:37,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:22:37,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:22:37,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:37,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:22:37,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:22:37,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 23:22:37,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:38,318 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:22:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:38,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:38,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:38,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:38,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:22:38,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:22:38,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544816908] [2020-10-27 23:22:38,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:38,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:22:38,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213781485] [2020-10-27 23:22:38,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:22:38,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:38,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:22:38,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:22:38,407 INFO L87 Difference]: Start difference. First operand 435 states and 634 transitions. Second operand 4 states. [2020-10-27 23:22:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:39,733 INFO L93 Difference]: Finished difference Result 1152 states and 1681 transitions. [2020-10-27 23:22:39,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:22:39,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-27 23:22:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:39,746 INFO L225 Difference]: With dead ends: 1152 [2020-10-27 23:22:39,747 INFO L226 Difference]: Without dead ends: 827 [2020-10-27 23:22:39,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:22:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-10-27 23:22:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 438. [2020-10-27 23:22:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-27 23:22:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 638 transitions. [2020-10-27 23:22:39,805 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 638 transitions. Word has length 97 [2020-10-27 23:22:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:39,805 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 638 transitions. [2020-10-27 23:22:39,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:22:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 638 transitions. [2020-10-27 23:22:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:22:39,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:39,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:22:39,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:22:39,810 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:39,811 INFO L82 PathProgramCache]: Analyzing trace with hash -267503930, now seen corresponding path program 1 times [2020-10-27 23:22:39,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:39,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556154715] [2020-10-27 23:22:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:39,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:40,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:40,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:40,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:40,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:41,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:41,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:42,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:42,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:42,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:43,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:44,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:44,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:22:44,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:22:44,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 23:22:44,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:44,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:22:44,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:22:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:22:44,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:45,172 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:22:45,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:45,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:45,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:45,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:45,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:45,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:22:45,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:45,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:45,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:45,236 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 23:22:45,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556154715] [2020-10-27 23:22:45,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:45,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:22:45,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91239209] [2020-10-27 23:22:45,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:22:45,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:45,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:22:45,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:22:45,239 INFO L87 Difference]: Start difference. First operand 438 states and 638 transitions. Second operand 4 states. [2020-10-27 23:22:46,702 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:22:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:47,505 INFO L93 Difference]: Finished difference Result 1060 states and 1569 transitions. [2020-10-27 23:22:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:22:47,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-27 23:22:47,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:47,512 INFO L225 Difference]: With dead ends: 1060 [2020-10-27 23:22:47,512 INFO L226 Difference]: Without dead ends: 772 [2020-10-27 23:22:47,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:22:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2020-10-27 23:22:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 751. [2020-10-27 23:22:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 751 states. [2020-10-27 23:22:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1093 transitions. [2020-10-27 23:22:47,582 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1093 transitions. Word has length 98 [2020-10-27 23:22:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:47,583 INFO L481 AbstractCegarLoop]: Abstraction has 751 states and 1093 transitions. [2020-10-27 23:22:47,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:22:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1093 transitions. [2020-10-27 23:22:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 23:22:47,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:47,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:22:47,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:22:47,586 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1981257629, now seen corresponding path program 1 times [2020-10-27 23:22:47,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:47,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676092689] [2020-10-27 23:22:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:47,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:47,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:47,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:47,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:47,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:47,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:48,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:49,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:50,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:50,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:50,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:50,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:52,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:52,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 23:22:52,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:22:52,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:22:52,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:52,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:22:52,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:22:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 23:22:52,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:22:53,139 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:22:53,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:53,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:53,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:53,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:53,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 23:22:53,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:53,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:53,216 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 23:22:53,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676092689] [2020-10-27 23:22:53,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:53,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:22:53,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146119329] [2020-10-27 23:22:53,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:22:53,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:22:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:22:53,220 INFO L87 Difference]: Start difference. First operand 751 states and 1093 transitions. Second operand 5 states. [2020-10-27 23:22:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:22:54,353 INFO L93 Difference]: Finished difference Result 1161 states and 1714 transitions. [2020-10-27 23:22:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:22:54,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-27 23:22:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:22:54,360 INFO L225 Difference]: With dead ends: 1161 [2020-10-27 23:22:54,360 INFO L226 Difference]: Without dead ends: 583 [2020-10-27 23:22:54,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:22:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2020-10-27 23:22:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 580. [2020-10-27 23:22:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-10-27 23:22:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 844 transitions. [2020-10-27 23:22:54,408 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 844 transitions. Word has length 98 [2020-10-27 23:22:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:22:54,409 INFO L481 AbstractCegarLoop]: Abstraction has 580 states and 844 transitions. [2020-10-27 23:22:54,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:22:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 844 transitions. [2020-10-27 23:22:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 23:22:54,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:22:54,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:22:54,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:22:54,412 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:22:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:22:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash -752892729, now seen corresponding path program 1 times [2020-10-27 23:22:54,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:22:54,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702011582] [2020-10-27 23:22:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:22:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:54,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:54,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:54,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:54,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:54,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:54,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:56,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:56,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:59,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:59,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 23:22:59,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:22:59,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:22:59,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:59,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:22:59,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:22:59,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 23:22:59,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:59,831 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:22:59,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:22:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:22:59,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:22:59,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:22:59,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:22:59,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:22:59,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:22:59,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:22:59,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:22:59,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:22:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:22:59,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:22:59,899 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 23:22:59,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702011582] [2020-10-27 23:22:59,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:22:59,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:22:59,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237157715] [2020-10-27 23:22:59,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:22:59,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:22:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:22:59,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:22:59,903 INFO L87 Difference]: Start difference. First operand 580 states and 844 transitions. Second operand 5 states. [2020-10-27 23:23:01,309 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:23:02,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:02,189 INFO L93 Difference]: Finished difference Result 1316 states and 1936 transitions. [2020-10-27 23:23:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:23:02,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2020-10-27 23:23:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:02,196 INFO L225 Difference]: With dead ends: 1316 [2020-10-27 23:23:02,196 INFO L226 Difference]: Without dead ends: 934 [2020-10-27 23:23:02,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:23:02,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-10-27 23:23:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 908. [2020-10-27 23:23:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2020-10-27 23:23:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1313 transitions. [2020-10-27 23:23:02,277 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1313 transitions. Word has length 100 [2020-10-27 23:23:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:02,278 INFO L481 AbstractCegarLoop]: Abstraction has 908 states and 1313 transitions. [2020-10-27 23:23:02,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:23:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1313 transitions. [2020-10-27 23:23:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 23:23:02,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:02,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:02,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:23:02,281 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:02,282 INFO L82 PathProgramCache]: Analyzing trace with hash -727604538, now seen corresponding path program 1 times [2020-10-27 23:23:02,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:02,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915660413] [2020-10-27 23:23:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:02,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:02,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:02,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:02,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:02,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:02,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:05,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:07,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:07,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 23:23:07,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:23:07,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:23:07,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:23:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 23:23:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:23:07,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:07,633 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:23:07,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:07,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:07,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:07,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:07,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:07,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:23:07,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:07,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:07,692 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 23:23:07,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915660413] [2020-10-27 23:23:07,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:07,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:23:07,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367144577] [2020-10-27 23:23:07,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:23:07,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:07,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:23:07,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:07,696 INFO L87 Difference]: Start difference. First operand 908 states and 1313 transitions. Second operand 5 states. [2020-10-27 23:23:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:08,802 INFO L93 Difference]: Finished difference Result 1759 states and 2533 transitions. [2020-10-27 23:23:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:23:08,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-10-27 23:23:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:08,809 INFO L225 Difference]: With dead ends: 1759 [2020-10-27 23:23:08,810 INFO L226 Difference]: Without dead ends: 906 [2020-10-27 23:23:08,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:23:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-10-27 23:23:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 904. [2020-10-27 23:23:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-10-27 23:23:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1304 transitions. [2020-10-27 23:23:08,880 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1304 transitions. Word has length 101 [2020-10-27 23:23:08,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:08,880 INFO L481 AbstractCegarLoop]: Abstraction has 904 states and 1304 transitions. [2020-10-27 23:23:08,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:23:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1304 transitions. [2020-10-27 23:23:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 23:23:08,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:08,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:08,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:23:08,883 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:08,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1609679563, now seen corresponding path program 1 times [2020-10-27 23:23:08,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:08,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397066936] [2020-10-27 23:23:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:08,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:08,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:08,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:09,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:09,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:09,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:10,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:11,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:11,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:11,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:13,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:13,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 23:23:13,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:23:13,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:23:13,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:13,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:23:13,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 23:23:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:23:13,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:14,210 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:23:14,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:14,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:14,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:14,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:14,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:14,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:23:14,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:14,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:14,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:14,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:14,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:23:14,302 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 23:23:14,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397066936] [2020-10-27 23:23:14,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:14,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:23:14,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915999229] [2020-10-27 23:23:14,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:23:14,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:14,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:23:14,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:23:14,307 INFO L87 Difference]: Start difference. First operand 904 states and 1304 transitions. Second operand 4 states. [2020-10-27 23:23:15,652 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:23:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:16,396 INFO L93 Difference]: Finished difference Result 2001 states and 2925 transitions. [2020-10-27 23:23:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:23:16,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-10-27 23:23:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:16,406 INFO L225 Difference]: With dead ends: 2001 [2020-10-27 23:23:16,406 INFO L226 Difference]: Without dead ends: 1364 [2020-10-27 23:23:16,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:23:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2020-10-27 23:23:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1335. [2020-10-27 23:23:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1335 states. [2020-10-27 23:23:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1910 transitions. [2020-10-27 23:23:16,509 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1910 transitions. Word has length 102 [2020-10-27 23:23:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:16,511 INFO L481 AbstractCegarLoop]: Abstraction has 1335 states and 1910 transitions. [2020-10-27 23:23:16,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:23:16,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1910 transitions. [2020-10-27 23:23:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 23:23:16,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:16,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:16,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:23:16,514 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:16,516 INFO L82 PathProgramCache]: Analyzing trace with hash 453422280, now seen corresponding path program 1 times [2020-10-27 23:23:16,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:16,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449280203] [2020-10-27 23:23:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:16,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:16,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:16,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:16,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:16,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:16,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:17,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:18,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:21,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:21,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 23:23:21,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:23:21,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:23:21,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:21,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:23:21,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 23:23:21,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 23:23:21,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:21,855 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:23:21,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:21,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:21,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:21,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:21,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:21,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:23:21,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:21,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:21,897 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 23:23:21,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449280203] [2020-10-27 23:23:21,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:21,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:23:21,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431258297] [2020-10-27 23:23:21,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:23:21,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:23:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:21,900 INFO L87 Difference]: Start difference. First operand 1335 states and 1910 transitions. Second operand 5 states. [2020-10-27 23:23:22,176 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 23:23:23,070 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 23:23:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:24,025 INFO L93 Difference]: Finished difference Result 3261 states and 5004 transitions. [2020-10-27 23:23:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:23:24,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-27 23:23:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:24,038 INFO L225 Difference]: With dead ends: 3261 [2020-10-27 23:23:24,038 INFO L226 Difference]: Without dead ends: 2503 [2020-10-27 23:23:24,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:23:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2020-10-27 23:23:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2487. [2020-10-27 23:23:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2487 states. [2020-10-27 23:23:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3778 transitions. [2020-10-27 23:23:24,257 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3778 transitions. Word has length 104 [2020-10-27 23:23:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:24,258 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 3778 transitions. [2020-10-27 23:23:24,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:23:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3778 transitions. [2020-10-27 23:23:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 23:23:24,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:24,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:24,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:23:24,261 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:24,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:24,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1434309213, now seen corresponding path program 1 times [2020-10-27 23:23:24,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:24,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575834652] [2020-10-27 23:23:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:24,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:24,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:24,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:24,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:24,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:24,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:25,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:25,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:25,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:29,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:29,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 23:23:29,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:23:29,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:23:29,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:29,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:23:29,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:23:29,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 23:23:29,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:29,629 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:23:29,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:29,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:29,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:29,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:29,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:29,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:23:29,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:29,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:29,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:29,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:29,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:29,674 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 23:23:29,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575834652] [2020-10-27 23:23:29,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:29,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:23:29,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006035782] [2020-10-27 23:23:29,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:23:29,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:29,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:23:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:29,676 INFO L87 Difference]: Start difference. First operand 2487 states and 3778 transitions. Second operand 5 states. [2020-10-27 23:23:31,044 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:23:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:31,958 INFO L93 Difference]: Finished difference Result 5030 states and 7608 transitions. [2020-10-27 23:23:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:23:31,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-27 23:23:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:31,970 INFO L225 Difference]: With dead ends: 5030 [2020-10-27 23:23:31,970 INFO L226 Difference]: Without dead ends: 2647 [2020-10-27 23:23:31,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:23:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2020-10-27 23:23:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2551. [2020-10-27 23:23:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2551 states. [2020-10-27 23:23:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 3854 transitions. [2020-10-27 23:23:32,169 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 3854 transitions. Word has length 104 [2020-10-27 23:23:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:32,169 INFO L481 AbstractCegarLoop]: Abstraction has 2551 states and 3854 transitions. [2020-10-27 23:23:32,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:23:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 3854 transitions. [2020-10-27 23:23:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 23:23:32,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:32,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:32,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:23:32,173 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:32,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1918956518, now seen corresponding path program 1 times [2020-10-27 23:23:32,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:32,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169632709] [2020-10-27 23:23:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:32,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:32,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:32,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:32,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:32,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:32,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:34,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:34,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:35,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:35,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:37,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:37,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 23:23:37,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:23:37,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:23:37,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:37,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:23:37,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 23:23:37,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:23:37,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:37,486 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:23:37,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:37,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:37,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:37,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:37,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:23:37,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:37,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:37,515 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 23:23:37,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169632709] [2020-10-27 23:23:37,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:37,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:23:37,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388437890] [2020-10-27 23:23:37,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:23:37,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:37,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:23:37,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:23:37,517 INFO L87 Difference]: Start difference. First operand 2551 states and 3854 transitions. Second operand 4 states. [2020-10-27 23:23:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:39,074 INFO L93 Difference]: Finished difference Result 7436 states and 11267 transitions. [2020-10-27 23:23:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:23:39,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-27 23:23:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:39,097 INFO L225 Difference]: With dead ends: 7436 [2020-10-27 23:23:39,097 INFO L226 Difference]: Without dead ends: 5053 [2020-10-27 23:23:39,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:23:39,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2020-10-27 23:23:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 2555. [2020-10-27 23:23:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2555 states. [2020-10-27 23:23:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2555 states to 2555 states and 3858 transitions. [2020-10-27 23:23:39,401 INFO L78 Accepts]: Start accepts. Automaton has 2555 states and 3858 transitions. Word has length 105 [2020-10-27 23:23:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:39,402 INFO L481 AbstractCegarLoop]: Abstraction has 2555 states and 3858 transitions. [2020-10-27 23:23:39,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:23:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2555 states and 3858 transitions. [2020-10-27 23:23:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 23:23:39,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:39,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:39,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:23:39,406 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:39,406 INFO L82 PathProgramCache]: Analyzing trace with hash 939227710, now seen corresponding path program 1 times [2020-10-27 23:23:39,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:39,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281588993] [2020-10-27 23:23:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:39,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:41,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:41,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:41,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:44,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:44,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 23:23:44,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:23:44,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:23:44,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:23:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:23:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 23:23:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:44,772 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:23:44,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:44,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:44,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:44,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:44,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:44,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:23:44,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:44,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:44,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:44,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:44,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:44,821 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 23:23:44,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281588993] [2020-10-27 23:23:44,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:44,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:23:44,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006435835] [2020-10-27 23:23:44,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:23:44,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:44,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:23:44,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:44,824 INFO L87 Difference]: Start difference. First operand 2555 states and 3858 transitions. Second operand 5 states. [2020-10-27 23:23:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:46,082 INFO L93 Difference]: Finished difference Result 5059 states and 7636 transitions. [2020-10-27 23:23:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:23:46,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-27 23:23:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:46,092 INFO L225 Difference]: With dead ends: 5059 [2020-10-27 23:23:46,092 INFO L226 Difference]: Without dead ends: 2555 [2020-10-27 23:23:46,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:23:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2020-10-27 23:23:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2553. [2020-10-27 23:23:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2553 states. [2020-10-27 23:23:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 3848 transitions. [2020-10-27 23:23:46,298 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 3848 transitions. Word has length 106 [2020-10-27 23:23:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:46,298 INFO L481 AbstractCegarLoop]: Abstraction has 2553 states and 3848 transitions. [2020-10-27 23:23:46,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:23:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 3848 transitions. [2020-10-27 23:23:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 23:23:46,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:46,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:46,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:23:46,302 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:46,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2099520771, now seen corresponding path program 1 times [2020-10-27 23:23:46,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:46,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554694388] [2020-10-27 23:23:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:46,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:46,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:46,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:46,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:47,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:47,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:47,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:47,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:47,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:51,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:51,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 23:23:51,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:23:51,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:23:51,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:51,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:23:51,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:23:51,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 23:23:51,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:51,690 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:23:51,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:51,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:51,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:51,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:51,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:51,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:23:51,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:51,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:51,739 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 23:23:51,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554694388] [2020-10-27 23:23:51,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:51,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:23:51,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531308551] [2020-10-27 23:23:51,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:23:51,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:23:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:51,741 INFO L87 Difference]: Start difference. First operand 2553 states and 3848 transitions. Second operand 5 states. [2020-10-27 23:23:53,294 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:23:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:54,477 INFO L93 Difference]: Finished difference Result 7149 states and 10852 transitions. [2020-10-27 23:23:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:23:54,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-27 23:23:54,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:54,497 INFO L225 Difference]: With dead ends: 7149 [2020-10-27 23:23:54,497 INFO L226 Difference]: Without dead ends: 4904 [2020-10-27 23:23:54,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:23:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2020-10-27 23:23:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 4884. [2020-10-27 23:23:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4884 states. [2020-10-27 23:23:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4884 states to 4884 states and 7294 transitions. [2020-10-27 23:23:54,948 INFO L78 Accepts]: Start accepts. Automaton has 4884 states and 7294 transitions. Word has length 106 [2020-10-27 23:23:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:54,948 INFO L481 AbstractCegarLoop]: Abstraction has 4884 states and 7294 transitions. [2020-10-27 23:23:54,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:23:54,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4884 states and 7294 transitions. [2020-10-27 23:23:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 23:23:54,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:54,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:23:54,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:23:54,954 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:54,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1288487353, now seen corresponding path program 1 times [2020-10-27 23:23:54,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:54,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732802038] [2020-10-27 23:23:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:54,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:55,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:55,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:55,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:56,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:56,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:56,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:56,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:59,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:59,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 23:23:59,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:23:59,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:23:59,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:23:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:23:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:23:59,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:00,365 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:24:00,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:00,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:00,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:00,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:00,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:00,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:24:00,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:00,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:00,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:00,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:00,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:00,400 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 23:24:00,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732802038] [2020-10-27 23:24:00,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:00,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:24:00,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130308410] [2020-10-27 23:24:00,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:24:00,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:00,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:24:00,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:00,402 INFO L87 Difference]: Start difference. First operand 4884 states and 7294 transitions. Second operand 5 states. [2020-10-27 23:24:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:01,845 INFO L93 Difference]: Finished difference Result 9747 states and 14555 transitions. [2020-10-27 23:24:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:01,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-27 23:24:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:01,870 INFO L225 Difference]: With dead ends: 9747 [2020-10-27 23:24:01,871 INFO L226 Difference]: Without dead ends: 4884 [2020-10-27 23:24:01,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:24:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2020-10-27 23:24:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4884. [2020-10-27 23:24:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4884 states. [2020-10-27 23:24:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4884 states to 4884 states and 7288 transitions. [2020-10-27 23:24:02,251 INFO L78 Accepts]: Start accepts. Automaton has 4884 states and 7288 transitions. Word has length 107 [2020-10-27 23:24:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:02,251 INFO L481 AbstractCegarLoop]: Abstraction has 4884 states and 7288 transitions. [2020-10-27 23:24:02,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:24:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4884 states and 7288 transitions. [2020-10-27 23:24:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 23:24:02,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:02,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:02,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:24:02,255 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:02,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:02,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1220077589, now seen corresponding path program 1 times [2020-10-27 23:24:02,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:02,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867672030] [2020-10-27 23:24:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:02,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:02,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:02,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:02,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:02,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:02,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:02,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:03,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:03,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:04,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:04,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:07,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:07,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 23:24:07,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:24:07,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:24:07,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:07,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:24:07,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:24:07,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 23:24:07,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:07,579 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:24:07,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:07,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:07,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:07,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:07,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:07,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:24:07,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:07,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:07,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:07,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:07,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:07,616 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 23:24:07,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867672030] [2020-10-27 23:24:07,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:07,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:24:07,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919794595] [2020-10-27 23:24:07,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:24:07,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:24:07,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:07,618 INFO L87 Difference]: Start difference. First operand 4884 states and 7288 transitions. Second operand 4 states. [2020-10-27 23:24:09,134 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:24:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:10,484 INFO L93 Difference]: Finished difference Result 11422 states and 17191 transitions. [2020-10-27 23:24:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:10,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-27 23:24:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:10,517 INFO L225 Difference]: With dead ends: 11422 [2020-10-27 23:24:10,518 INFO L226 Difference]: Without dead ends: 7259 [2020-10-27 23:24:10,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:24:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7259 states. [2020-10-27 23:24:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7259 to 7247. [2020-10-27 23:24:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7247 states. [2020-10-27 23:24:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7247 states to 7247 states and 10647 transitions. [2020-10-27 23:24:11,140 INFO L78 Accepts]: Start accepts. Automaton has 7247 states and 10647 transitions. Word has length 108 [2020-10-27 23:24:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:11,141 INFO L481 AbstractCegarLoop]: Abstraction has 7247 states and 10647 transitions. [2020-10-27 23:24:11,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:24:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7247 states and 10647 transitions. [2020-10-27 23:24:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 23:24:11,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:11,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:11,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:24:11,147 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:11,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 840644890, now seen corresponding path program 1 times [2020-10-27 23:24:11,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:11,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933855443] [2020-10-27 23:24:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:11,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:11,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:11,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:11,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:11,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:11,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:12,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:13,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:13,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:14,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:14,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:15,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:16,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 23:24:16,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:24:16,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:24:16,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:24:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:24:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 23:24:16,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:16,544 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:24:16,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:16,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:16,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:16,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:16,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:24:16,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:16,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:16,594 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 23:24:16,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933855443] [2020-10-27 23:24:16,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:16,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:24:16,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642060965] [2020-10-27 23:24:16,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:24:16,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:16,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:24:16,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:24:16,596 INFO L87 Difference]: Start difference. First operand 7247 states and 10647 transitions. Second operand 7 states. [2020-10-27 23:24:18,053 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 23:24:18,334 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 23:24:18,636 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:24:18,975 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:24:19,332 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:24:21,426 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 23:24:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:23,129 INFO L93 Difference]: Finished difference Result 36140 states and 55726 transitions. [2020-10-27 23:24:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 23:24:23,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-27 23:24:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:23,211 INFO L225 Difference]: With dead ends: 36140 [2020-10-27 23:24:23,211 INFO L226 Difference]: Without dead ends: 31072 [2020-10-27 23:24:23,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-27 23:24:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31072 states. [2020-10-27 23:24:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31072 to 21678. [2020-10-27 23:24:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21678 states. [2020-10-27 23:24:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21678 states to 21678 states and 32956 transitions. [2020-10-27 23:24:25,189 INFO L78 Accepts]: Start accepts. Automaton has 21678 states and 32956 transitions. Word has length 110 [2020-10-27 23:24:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:25,190 INFO L481 AbstractCegarLoop]: Abstraction has 21678 states and 32956 transitions. [2020-10-27 23:24:25,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:24:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 21678 states and 32956 transitions. [2020-10-27 23:24:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 23:24:25,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:25,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:25,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:24:25,197 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash 114794768, now seen corresponding path program 1 times [2020-10-27 23:24:25,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:25,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184766134] [2020-10-27 23:24:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:25,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:27,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:27,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:27,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:28,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:28,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:30,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:30,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 23:24:30,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:24:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:24:30,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 23:24:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:24:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 23:24:30,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:31,170 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:24:31,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:31,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:31,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:31,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:31,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:31,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:24:31,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:31,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:24:31,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184766134] [2020-10-27 23:24:31,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:31,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-27 23:24:31,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391124060] [2020-10-27 23:24:31,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 23:24:31,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:31,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 23:24:31,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:24:31,247 INFO L87 Difference]: Start difference. First operand 21678 states and 32956 transitions. Second operand 17 states. [2020-10-27 23:24:31,599 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:24:32,981 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-27 23:24:33,204 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-27 23:24:36,314 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:24:36,755 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:24:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:38,827 INFO L93 Difference]: Finished difference Result 36716 states and 55900 transitions. [2020-10-27 23:24:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:24:38,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2020-10-27 23:24:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:38,872 INFO L225 Difference]: With dead ends: 36716 [2020-10-27 23:24:38,872 INFO L226 Difference]: Without dead ends: 22507 [2020-10-27 23:24:38,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 23:24:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22507 states. [2020-10-27 23:24:40,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22507 to 22104. [2020-10-27 23:24:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22104 states. [2020-10-27 23:24:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22104 states to 22104 states and 33451 transitions. [2020-10-27 23:24:41,097 INFO L78 Accepts]: Start accepts. Automaton has 22104 states and 33451 transitions. Word has length 110 [2020-10-27 23:24:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:41,098 INFO L481 AbstractCegarLoop]: Abstraction has 22104 states and 33451 transitions. [2020-10-27 23:24:41,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 23:24:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 22104 states and 33451 transitions. [2020-10-27 23:24:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 23:24:41,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:41,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:41,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:24:41,107 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1657125729, now seen corresponding path program 1 times [2020-10-27 23:24:41,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:41,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104377855] [2020-10-27 23:24:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:41,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:41,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:41,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:41,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:42,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:42,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:46,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:46,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 23:24:46,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:24:46,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:24:46,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:46,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:24:46,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:24:46,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 23:24:46,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:46,486 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:24:46,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:46,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:46,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:46,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:46,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:46,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:24:46,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:46,541 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 23:24:46,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104377855] [2020-10-27 23:24:46,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:46,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:24:46,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248387171] [2020-10-27 23:24:46,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:24:46,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:46,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:24:46,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:46,543 INFO L87 Difference]: Start difference. First operand 22104 states and 33451 transitions. Second operand 5 states. [2020-10-27 23:24:47,830 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:24:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:49,894 INFO L93 Difference]: Finished difference Result 33839 states and 51500 transitions. [2020-10-27 23:24:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:24:49,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-10-27 23:24:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:49,932 INFO L225 Difference]: With dead ends: 33839 [2020-10-27 23:24:49,932 INFO L226 Difference]: Without dead ends: 19761 [2020-10-27 23:24:49,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:24:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19761 states. [2020-10-27 23:24:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19761 to 19324. [2020-10-27 23:24:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19324 states. [2020-10-27 23:24:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 29199 transitions. [2020-10-27 23:24:52,027 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 29199 transitions. Word has length 110 [2020-10-27 23:24:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:52,027 INFO L481 AbstractCegarLoop]: Abstraction has 19324 states and 29199 transitions. [2020-10-27 23:24:52,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:24:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 29199 transitions. [2020-10-27 23:24:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 23:24:52,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:52,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:24:52,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:24:52,033 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash 287456456, now seen corresponding path program 1 times [2020-10-27 23:24:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:52,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463289325] [2020-10-27 23:24:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:52,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:53,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:53,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:53,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:53,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:53,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:53,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:53,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:54,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:55,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:56,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:56,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:57,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:57,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 23:24:57,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 23:24:57,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:24:57,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 23:24:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 23:24:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 23:24:57,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:57,602 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:24:57,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:57,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:57,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:57,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:57,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:57,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:24:57,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:57,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:57,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:57,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:57,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:57,652 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 23:24:57,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463289325] [2020-10-27 23:24:57,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:57,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 23:24:57,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884655572] [2020-10-27 23:24:57,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 23:24:57,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:57,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 23:24:57,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:24:57,654 INFO L87 Difference]: Start difference. First operand 19324 states and 29199 transitions. Second operand 13 states. [2020-10-27 23:24:58,052 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 23:25:01,695 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 23:25:02,019 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:25:02,361 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 23:25:02,698 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 23:25:08,291 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 23:25:08,808 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-27 23:25:13,892 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-27 23:25:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:25:24,854 INFO L93 Difference]: Finished difference Result 160130 states and 242056 transitions. [2020-10-27 23:25:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-27 23:25:24,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 112 [2020-10-27 23:25:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:25:25,174 INFO L225 Difference]: With dead ends: 160130 [2020-10-27 23:25:25,174 INFO L226 Difference]: Without dead ends: 142502 [2020-10-27 23:25:25,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=921, Invalid=4481, Unknown=0, NotChecked=0, Total=5402 [2020-10-27 23:25:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142502 states. [2020-10-27 23:25:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142502 to 69280. [2020-10-27 23:25:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69280 states. [2020-10-27 23:25:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69280 states to 69280 states and 106882 transitions. [2020-10-27 23:25:35,410 INFO L78 Accepts]: Start accepts. Automaton has 69280 states and 106882 transitions. Word has length 112 [2020-10-27 23:25:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:25:35,410 INFO L481 AbstractCegarLoop]: Abstraction has 69280 states and 106882 transitions. [2020-10-27 23:25:35,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 23:25:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 69280 states and 106882 transitions. [2020-10-27 23:25:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 23:25:35,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:25:35,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:25:35,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:25:35,419 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:25:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:25:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash 21716972, now seen corresponding path program 1 times [2020-10-27 23:25:35,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:25:35,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657675570] [2020-10-27 23:25:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:25:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:35,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:35,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:35,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:35,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:35,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:36,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:36,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:36,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:36,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:40,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:40,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 23:25:40,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:25:40,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:25:40,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:25:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 23:25:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:25:40,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:40,775 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:25:40,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:25:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:40,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:40,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:40,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:25:40,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:25:40,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:25:40,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:40,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:25:40,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:25:40,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:25:40,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:40,815 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 23:25:40,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657675570] [2020-10-27 23:25:40,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:25:40,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:25:40,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615576351] [2020-10-27 23:25:40,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:25:40,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:25:40,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:25:40,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:25:40,817 INFO L87 Difference]: Start difference. First operand 69280 states and 106882 transitions. Second operand 7 states. [2020-10-27 23:25:41,132 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 23:25:42,964 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:25:43,289 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 23:25:43,579 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 23:25:43,859 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 23:25:44,146 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:25:50,631 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-27 23:25:51,412 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 205