/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:26:28,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:26:28,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:26:28,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:26:28,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:26:28,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:26:28,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:26:28,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:26:28,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:26:28,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:26:28,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:26:28,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:26:28,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:26:28,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:26:28,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:26:28,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:26:28,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:26:28,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:26:28,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:26:28,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:26:28,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:26:28,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:26:28,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:26:28,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:26:28,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 02:26:28,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 02:26:28,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 02:26:28,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 02:26:28,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 02:26:28,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 02:26:28,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 02:26:28,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 02:26:28,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 02:26:28,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 02:26:28,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 02:26:28,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 02:26:28,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 02:26:28,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 02:26:28,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:26:28,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:26:28,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:26:28,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:26:29,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:26:29,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:26:29,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:26:29,010 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:26:29,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:26:29,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:26:29,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:26:29,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:26:29,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:26:29,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:26:29,013 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:26:29,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:26:29,013 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:26:29,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:26:29,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:26:29,014 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:26:29,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:26:29,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:26:29,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:26:29,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:26:29,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:26:29,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:26:29,016 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:26:29,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:26:29,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:26:29,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:26:29,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:26:29,480 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:26:29,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-07 02:26:29,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/419dd1012/e005be3320534625afd422e8b1f8bc5d/FLAGc610d59f6 [2020-11-07 02:26:30,395 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:26:30,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-07 02:26:30,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/419dd1012/e005be3320534625afd422e8b1f8bc5d/FLAGc610d59f6 [2020-11-07 02:26:30,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/419dd1012/e005be3320534625afd422e8b1f8bc5d [2020-11-07 02:26:30,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:26:30,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:26:30,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:26:30,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:26:30,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:26:30,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:26:30" (1/1) ... [2020-11-07 02:26:30,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7283e0b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:30, skipping insertion in model container [2020-11-07 02:26:30,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:26:30" (1/1) ... [2020-11-07 02:26:30,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:26:30,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:26:31,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:26:31,799 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:26:32,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:26:32,243 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:26:32,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32 WrapperNode [2020-11-07 02:26:32,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:26:32,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:26:32,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:26:32,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:26:32,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32" (1/1) ... [2020-11-07 02:26:32,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32" (1/1) ... [2020-11-07 02:26:32,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32" (1/1) ... [2020-11-07 02:26:32,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32" (1/1) ... [2020-11-07 02:26:32,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32" (1/1) ... [2020-11-07 02:26:32,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32" (1/1) ... [2020-11-07 02:26:32,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32" (1/1) ... [2020-11-07 02:26:32,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:26:32,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:26:32,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:26:32,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:26:32,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-11-07 02:26:32,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:26:32,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:26:32,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:26:32,510 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:26:32,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:26:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:26:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:26:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:26:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:26:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-07 02:26:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-07 02:26:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-07 02:26:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-07 02:26:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:26:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-07 02:26:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-07 02:26:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-07 02:26:32,513 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-07 02:26:32,513 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-07 02:26:32,513 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-07 02:26:32,513 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-07 02:26:32,513 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-07 02:26:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:26:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:26:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:26:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:26:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:26:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:26:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:26:36,508 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:26:36,509 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 02:26:36,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:26:36 BoogieIcfgContainer [2020-11-07 02:26:36,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:26:36,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:26:36,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:26:36,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:26:36,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:26:30" (1/3) ... [2020-11-07 02:26:36,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f56c2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:26:36, skipping insertion in model container [2020-11-07 02:26:36,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:26:32" (2/3) ... [2020-11-07 02:26:36,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f56c2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:26:36, skipping insertion in model container [2020-11-07 02:26:36,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:26:36" (3/3) ... [2020-11-07 02:26:36,528 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-07 02:26:36,546 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:26:36,551 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:26:36,564 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:26:36,600 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:26:36,600 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:26:36,600 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:26:36,601 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:26:36,601 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:26:36,601 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:26:36,601 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:26:36,601 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:26:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states. [2020-11-07 02:26:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2020-11-07 02:26:36,736 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:26:36,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:26:36,739 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:26:36,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:26:36,746 INFO L82 PathProgramCache]: Analyzing trace with hash -863154161, now seen corresponding path program 1 times [2020-11-07 02:26:36,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:26:36,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945756558] [2020-11-07 02:26:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:26:36,852 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:26:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:39,455 WARN L194 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:26:39,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:26:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:26:40,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945756558] [2020-11-07 02:26:40,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:26:40,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:26:40,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624489688] [2020-11-07 02:26:40,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:26:40,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:26:40,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:26:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:26:40,464 INFO L87 Difference]: Start difference. First operand 2005 states. Second operand 4 states. [2020-11-07 02:26:50,009 WARN L194 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-11-07 02:26:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:26:51,567 INFO L93 Difference]: Finished difference Result 3461 states and 4569 transitions. [2020-11-07 02:26:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:26:51,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 917 [2020-11-07 02:26:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:26:51,621 INFO L225 Difference]: With dead ends: 3461 [2020-11-07 02:26:51,621 INFO L226 Difference]: Without dead ends: 2819 [2020-11-07 02:26:51,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:26:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2020-11-07 02:26:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2805. [2020-11-07 02:26:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2805 states. [2020-11-07 02:26:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 3524 transitions. [2020-11-07 02:26:51,867 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 3524 transitions. Word has length 917 [2020-11-07 02:26:51,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:26:51,870 INFO L481 AbstractCegarLoop]: Abstraction has 2805 states and 3524 transitions. [2020-11-07 02:26:51,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:26:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 3524 transitions. [2020-11-07 02:26:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2020-11-07 02:26:51,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:26:51,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:26:51,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:26:51,907 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:26:51,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:26:51,908 INFO L82 PathProgramCache]: Analyzing trace with hash 507122223, now seen corresponding path program 1 times [2020-11-07 02:26:51,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:26:51,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124246270] [2020-11-07 02:26:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:26:51,927 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:26:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:53,040 WARN L194 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:26:53,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:26:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:26:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:26:53,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124246270] [2020-11-07 02:26:53,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:26:53,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:26:53,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540431797] [2020-11-07 02:26:53,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:26:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:26:53,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:26:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:26:53,691 INFO L87 Difference]: Start difference. First operand 2805 states and 3524 transitions. Second operand 4 states. [2020-11-07 02:27:01,453 WARN L194 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-11-07 02:27:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:27:02,883 INFO L93 Difference]: Finished difference Result 5341 states and 6807 transitions. [2020-11-07 02:27:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:27:02,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 917 [2020-11-07 02:27:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:27:02,908 INFO L225 Difference]: With dead ends: 5341 [2020-11-07 02:27:02,909 INFO L226 Difference]: Without dead ends: 4692 [2020-11-07 02:27:02,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:27:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4692 states. [2020-11-07 02:27:03,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4692 to 4667. [2020-11-07 02:27:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4667 states. [2020-11-07 02:27:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 5908 transitions. [2020-11-07 02:27:03,092 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 5908 transitions. Word has length 917 [2020-11-07 02:27:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:27:03,094 INFO L481 AbstractCegarLoop]: Abstraction has 4667 states and 5908 transitions. [2020-11-07 02:27:03,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:27:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 5908 transitions. [2020-11-07 02:27:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2020-11-07 02:27:03,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:27:03,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:27:03,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:27:03,116 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:27:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:27:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1177650927, now seen corresponding path program 1 times [2020-11-07 02:27:03,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:27:03,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660034533] [2020-11-07 02:27:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:27:03,132 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:27:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:27:04,715 WARN L194 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:27:04,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:27:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:27:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:27:05,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660034533] [2020-11-07 02:27:05,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:27:05,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:27:05,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195638170] [2020-11-07 02:27:05,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:27:05,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:27:05,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:27:05,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:27:05,413 INFO L87 Difference]: Start difference. First operand 4667 states and 5908 transitions. Second operand 5 states. [2020-11-07 02:27:17,375 WARN L194 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-07 02:27:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:27:20,237 INFO L93 Difference]: Finished difference Result 13231 states and 16887 transitions. [2020-11-07 02:27:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:27:20,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 917 [2020-11-07 02:27:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:27:20,274 INFO L225 Difference]: With dead ends: 13231 [2020-11-07 02:27:20,274 INFO L226 Difference]: Without dead ends: 8870 [2020-11-07 02:27:20,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:27:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8870 states. [2020-11-07 02:27:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8870 to 8867. [2020-11-07 02:27:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8867 states. [2020-11-07 02:27:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8867 states to 8867 states and 11259 transitions. [2020-11-07 02:27:20,781 INFO L78 Accepts]: Start accepts. Automaton has 8867 states and 11259 transitions. Word has length 917 [2020-11-07 02:27:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:27:20,783 INFO L481 AbstractCegarLoop]: Abstraction has 8867 states and 11259 transitions. [2020-11-07 02:27:20,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:27:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 8867 states and 11259 transitions. [2020-11-07 02:27:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2020-11-07 02:27:20,809 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:27:20,809 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:27:20,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:27:20,810 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:27:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:27:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1249531380, now seen corresponding path program 1 times [2020-11-07 02:27:20,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:27:20,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183050075] [2020-11-07 02:27:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:27:20,819 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:27:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:27:21,776 WARN L194 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:27:21,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:27:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:27:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:27:22,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183050075] [2020-11-07 02:27:22,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:27:22,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:27:22,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500172839] [2020-11-07 02:27:22,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:27:22,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:27:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:27:22,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:27:22,534 INFO L87 Difference]: Start difference. First operand 8867 states and 11259 transitions. Second operand 4 states. [2020-11-07 02:27:37,139 WARN L194 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-07 02:27:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:27:40,272 INFO L93 Difference]: Finished difference Result 25463 states and 32430 transitions. [2020-11-07 02:27:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:27:40,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 919 [2020-11-07 02:27:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:27:40,346 INFO L225 Difference]: With dead ends: 25463 [2020-11-07 02:27:40,346 INFO L226 Difference]: Without dead ends: 17108 [2020-11-07 02:27:40,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:27:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17108 states. [2020-11-07 02:27:41,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17108 to 17105. [2020-11-07 02:27:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17105 states. [2020-11-07 02:27:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17105 states to 17105 states and 21722 transitions. [2020-11-07 02:27:41,251 INFO L78 Accepts]: Start accepts. Automaton has 17105 states and 21722 transitions. Word has length 919 [2020-11-07 02:27:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:27:41,257 INFO L481 AbstractCegarLoop]: Abstraction has 17105 states and 21722 transitions. [2020-11-07 02:27:41,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:27:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 17105 states and 21722 transitions. [2020-11-07 02:27:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2020-11-07 02:27:41,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:27:41,302 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:27:41,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:27:41,303 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:27:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:27:41,304 INFO L82 PathProgramCache]: Analyzing trace with hash -834239883, now seen corresponding path program 1 times [2020-11-07 02:27:41,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:27:41,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991948348] [2020-11-07 02:27:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:27:41,312 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:27:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:27:42,292 WARN L194 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:27:42,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:27:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:27:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:27:43,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991948348] [2020-11-07 02:27:43,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:27:43,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:27:43,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007133844] [2020-11-07 02:27:43,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:27:43,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:27:43,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:27:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:27:43,012 INFO L87 Difference]: Start difference. First operand 17105 states and 21722 transitions. Second operand 4 states. [2020-11-07 02:28:00,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:28:00,727 INFO L93 Difference]: Finished difference Result 50611 states and 64414 transitions. [2020-11-07 02:28:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:28:00,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 919 [2020-11-07 02:28:00,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:28:00,798 INFO L225 Difference]: With dead ends: 50611 [2020-11-07 02:28:00,799 INFO L226 Difference]: Without dead ends: 33859 [2020-11-07 02:28:00,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:28:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33859 states. [2020-11-07 02:28:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33859 to 17127. [2020-11-07 02:28:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17127 states. [2020-11-07 02:28:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17127 states to 17127 states and 21753 transitions. [2020-11-07 02:28:02,053 INFO L78 Accepts]: Start accepts. Automaton has 17127 states and 21753 transitions. Word has length 919 [2020-11-07 02:28:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:28:02,054 INFO L481 AbstractCegarLoop]: Abstraction has 17127 states and 21753 transitions. [2020-11-07 02:28:02,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:28:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 17127 states and 21753 transitions. [2020-11-07 02:28:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-11-07 02:28:02,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:28:02,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:28:02,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:28:02,091 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:28:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:28:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash 308563790, now seen corresponding path program 1 times [2020-11-07 02:28:02,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:28:02,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749043385] [2020-11-07 02:28:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:28:02,097 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:28:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:28:03,022 WARN L194 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:28:03,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:28:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:28:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:28:03,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749043385] [2020-11-07 02:28:03,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:28:03,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:28:03,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972674020] [2020-11-07 02:28:03,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:28:03,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:28:03,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:28:03,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:28:03,754 INFO L87 Difference]: Start difference. First operand 17127 states and 21753 transitions. Second operand 4 states. [2020-11-07 02:28:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:28:22,278 INFO L93 Difference]: Finished difference Result 50625 states and 64430 transitions. [2020-11-07 02:28:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:28:22,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 920 [2020-11-07 02:28:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:28:22,341 INFO L225 Difference]: With dead ends: 50625 [2020-11-07 02:28:22,341 INFO L226 Difference]: Without dead ends: 33874 [2020-11-07 02:28:22,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:28:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33874 states. [2020-11-07 02:28:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33874 to 17147. [2020-11-07 02:28:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17147 states. [2020-11-07 02:28:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17147 states to 17147 states and 21776 transitions. [2020-11-07 02:28:23,876 INFO L78 Accepts]: Start accepts. Automaton has 17147 states and 21776 transitions. Word has length 920 [2020-11-07 02:28:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:28:23,877 INFO L481 AbstractCegarLoop]: Abstraction has 17147 states and 21776 transitions. [2020-11-07 02:28:23,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:28:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17147 states and 21776 transitions. [2020-11-07 02:28:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2020-11-07 02:28:23,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:28:23,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:28:23,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:28:23,909 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:28:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:28:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1793934984, now seen corresponding path program 1 times [2020-11-07 02:28:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:28:23,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986288098] [2020-11-07 02:28:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:28:23,915 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:28:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:28:24,848 WARN L194 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:28:24,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:28:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:28:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:28:25,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986288098] [2020-11-07 02:28:25,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:28:25,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:28:25,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218203086] [2020-11-07 02:28:25,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:28:25,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:28:25,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:28:25,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:28:25,684 INFO L87 Difference]: Start difference. First operand 17147 states and 21776 transitions. Second operand 4 states. [2020-11-07 02:28:41,458 WARN L194 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-07 02:28:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:28:44,783 INFO L93 Difference]: Finished difference Result 49623 states and 63050 transitions. [2020-11-07 02:28:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:28:44,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 921 [2020-11-07 02:28:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:28:44,831 INFO L225 Difference]: With dead ends: 49623 [2020-11-07 02:28:44,831 INFO L226 Difference]: Without dead ends: 33171 [2020-11-07 02:28:44,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:28:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33171 states. [2020-11-07 02:28:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33171 to 33168. [2020-11-07 02:28:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33168 states. [2020-11-07 02:28:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33168 states to 33168 states and 42026 transitions. [2020-11-07 02:28:47,493 INFO L78 Accepts]: Start accepts. Automaton has 33168 states and 42026 transitions. Word has length 921 [2020-11-07 02:28:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:28:47,494 INFO L481 AbstractCegarLoop]: Abstraction has 33168 states and 42026 transitions. [2020-11-07 02:28:47,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:28:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 33168 states and 42026 transitions. [2020-11-07 02:28:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2020-11-07 02:28:47,531 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:28:47,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:28:47,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:28:47,532 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:28:47,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:28:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1113303544, now seen corresponding path program 1 times [2020-11-07 02:28:47,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:28:47,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613535402] [2020-11-07 02:28:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:28:47,537 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:28:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:28:48,857 WARN L194 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:28:48,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:28:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:28:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:28:49,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613535402] [2020-11-07 02:28:49,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:28:49,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:28:49,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463738478] [2020-11-07 02:28:49,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:28:49,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:28:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:28:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:28:49,613 INFO L87 Difference]: Start difference. First operand 33168 states and 42026 transitions. Second operand 5 states. [2020-11-07 02:29:05,533 WARN L194 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-07 02:29:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:29:09,826 INFO L93 Difference]: Finished difference Result 97203 states and 123132 transitions. [2020-11-07 02:29:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:29:09,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 921 [2020-11-07 02:29:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:29:10,057 INFO L225 Difference]: With dead ends: 97203 [2020-11-07 02:29:10,058 INFO L226 Difference]: Without dead ends: 64403 [2020-11-07 02:29:10,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:29:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64403 states. [2020-11-07 02:29:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64403 to 64400. [2020-11-07 02:29:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64400 states. [2020-11-07 02:29:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64400 states to 64400 states and 81258 transitions. [2020-11-07 02:29:15,219 INFO L78 Accepts]: Start accepts. Automaton has 64400 states and 81258 transitions. Word has length 921 [2020-11-07 02:29:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:29:15,219 INFO L481 AbstractCegarLoop]: Abstraction has 64400 states and 81258 transitions. [2020-11-07 02:29:15,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:29:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 64400 states and 81258 transitions. [2020-11-07 02:29:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2020-11-07 02:29:15,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:29:15,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:29:15,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:29:15,295 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:29:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:29:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash 44525235, now seen corresponding path program 1 times [2020-11-07 02:29:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:29:15,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709324422] [2020-11-07 02:29:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:29:15,301 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:29:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:29:16,375 WARN L194 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:29:16,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:29:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:29:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:29:17,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709324422] [2020-11-07 02:29:17,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:29:17,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:29:17,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720530953] [2020-11-07 02:29:17,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:29:17,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:29:17,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:29:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:29:17,480 INFO L87 Difference]: Start difference. First operand 64400 states and 81258 transitions. Second operand 4 states. [2020-11-07 02:29:40,305 WARN L194 SmtUtils]: Spent 802.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-07 02:29:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:29:46,338 INFO L93 Difference]: Finished difference Result 189057 states and 238322 transitions. [2020-11-07 02:29:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 02:29:46,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 923 [2020-11-07 02:29:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:29:46,549 INFO L225 Difference]: With dead ends: 189057 [2020-11-07 02:29:46,549 INFO L226 Difference]: Without dead ends: 125834 [2020-11-07 02:29:46,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:29:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125834 states. [2020-11-07 02:29:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125834 to 125831. [2020-11-07 02:29:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125831 states. [2020-11-07 02:29:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125831 states to 125831 states and 158140 transitions. [2020-11-07 02:29:57,641 INFO L78 Accepts]: Start accepts. Automaton has 125831 states and 158140 transitions. Word has length 923 [2020-11-07 02:29:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:29:57,641 INFO L481 AbstractCegarLoop]: Abstraction has 125831 states and 158140 transitions. [2020-11-07 02:29:57,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:29:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 125831 states and 158140 transitions. [2020-11-07 02:29:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2020-11-07 02:29:58,040 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:29:58,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:29:58,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 02:29:58,041 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:29:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:29:58,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1403615437, now seen corresponding path program 1 times [2020-11-07 02:29:58,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:29:58,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023745334] [2020-11-07 02:29:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:29:58,046 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:29:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:29:59,509 WARN L194 SmtUtils]: Spent 953.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:29:59,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:29:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:30:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:30:00,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023745334] [2020-11-07 02:30:00,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:30:00,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:30:00,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323926501] [2020-11-07 02:30:00,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:30:00,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:30:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:30:00,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:30:00,235 INFO L87 Difference]: Start difference. First operand 125831 states and 158140 transitions. Second operand 5 states. [2020-11-07 02:30:29,863 WARN L194 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-07 02:30:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:30:39,396 INFO L93 Difference]: Finished difference Result 370854 states and 465590 transitions. [2020-11-07 02:30:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:30:39,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 923 [2020-11-07 02:30:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:30:40,006 INFO L225 Difference]: With dead ends: 370854 [2020-11-07 02:30:40,006 INFO L226 Difference]: Without dead ends: 245559 [2020-11-07 02:30:40,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:30:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245559 states. [2020-11-07 02:31:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245559 to 245556. [2020-11-07 02:31:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245556 states. [2020-11-07 02:31:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245556 states to 245556 states and 307096 transitions. [2020-11-07 02:31:04,407 INFO L78 Accepts]: Start accepts. Automaton has 245556 states and 307096 transitions. Word has length 923 [2020-11-07 02:31:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:31:04,408 INFO L481 AbstractCegarLoop]: Abstraction has 245556 states and 307096 transitions. [2020-11-07 02:31:04,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 02:31:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 245556 states and 307096 transitions. [2020-11-07 02:31:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2020-11-07 02:31:04,615 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:31:04,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:31:04,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 02:31:04,616 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:31:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:31:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1376314123, now seen corresponding path program 1 times [2020-11-07 02:31:04,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:31:04,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125012953] [2020-11-07 02:31:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:31:04,621 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:31:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:31:06,364 WARN L194 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-07 02:31:06,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:31:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:31:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:31:07,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125012953] [2020-11-07 02:31:07,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:31:07,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 02:31:07,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511144810] [2020-11-07 02:31:07,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 02:31:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:31:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 02:31:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:31:07,162 INFO L87 Difference]: Start difference. First operand 245556 states and 307096 transitions. Second operand 5 states.