/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/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:09:47,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:09:47,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:09:47,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:09:47,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:09:47,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:09:47,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:09:47,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:09:47,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:09:47,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:09:47,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:09:47,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:09:47,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:09:47,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:09:47,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:09:47,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:09:47,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:09:47,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:09:47,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:09:47,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:09:47,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:09:47,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:09:47,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:09:47,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:09:48,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:09:48,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 02:09:48,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 02:09:48,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 02:09:48,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 02:09:48,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 02:09:48,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 02:09:48,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 02:09:48,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 02:09:48,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:09:48,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:09:48,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:09:48,018 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 02:09:48,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:09:48,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:09:48,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:09:48,050 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:09:48,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:09:48,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:09:48,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:09:48,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:09:48,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:09:48,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:09:48,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:09:48,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:09:48,053 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:09:48,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:09:48,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:09:48,054 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:09:48,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:09:48,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:09:48,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:09:48,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:09:48,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:09:48,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:09:48,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:09:48,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:09:48,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:09:48,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:09:48,564 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:09:48,565 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:09:48,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-11-07 02:09:48,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/076f859c4/ffa2fa827eb64b89b432898a69e1c5a5/FLAGc1f875821 [2020-11-07 02:09:49,387 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:09:49,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-11-07 02:09:49,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/076f859c4/ffa2fa827eb64b89b432898a69e1c5a5/FLAGc1f875821 [2020-11-07 02:09:49,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/076f859c4/ffa2fa827eb64b89b432898a69e1c5a5 [2020-11-07 02:09:49,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:09:49,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:09:49,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:09:49,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:09:49,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:09:49,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:49" (1/1) ... [2020-11-07 02:09:49,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81edc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:49, skipping insertion in model container [2020-11-07 02:09:49,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:49" (1/1) ... [2020-11-07 02:09:49,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:09:49,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:09:50,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:09:50,222 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:09:50,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:09:50,434 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:09:50,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50 WrapperNode [2020-11-07 02:09:50,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:09:50,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:09:50,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:09:50,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:09:50,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50" (1/1) ... [2020-11-07 02:09:50,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50" (1/1) ... [2020-11-07 02:09:50,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50" (1/1) ... [2020-11-07 02:09:50,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50" (1/1) ... [2020-11-07 02:09:50,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50" (1/1) ... [2020-11-07 02:09:50,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50" (1/1) ... [2020-11-07 02:09:50,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50" (1/1) ... [2020-11-07 02:09:50,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:09:50,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:09:50,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:09:50,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:09:50,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50" (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 02:09:50,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:09:50,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:09:50,778 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:09:50,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:09:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:09:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:09:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:09:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:09:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-11-07 02:09:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-11-07 02:09:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:09:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:09:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:09:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 02:09:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:09:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:09:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:09:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:09:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:09:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 02:09:52,575 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:09:52,576 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 02:09:52,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:52 BoogieIcfgContainer [2020-11-07 02:09:52,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:09:52,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:09:52,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:09:52,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:09:52,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:49" (1/3) ... [2020-11-07 02:09:52,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0ffa3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:52, skipping insertion in model container [2020-11-07 02:09:52,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:50" (2/3) ... [2020-11-07 02:09:52,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0ffa3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:52, skipping insertion in model container [2020-11-07 02:09:52,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:52" (3/3) ... [2020-11-07 02:09:52,590 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-11-07 02:09:52,606 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:09:52,611 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:09:52,624 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:09:52,650 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:09:52,650 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:09:52,650 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:09:52,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:09:52,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:09:52,651 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:09:52,651 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:09:52,651 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:09:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states. [2020-11-07 02:09:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-11-07 02:09:52,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:52,724 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] [2020-11-07 02:09:52,724 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:52,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1474853034, now seen corresponding path program 1 times [2020-11-07 02:09:52,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:52,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320662101] [2020-11-07 02:09:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:52,843 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:54,454 WARN L194 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:09:54,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:54,968 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 02:09:54,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320662101] [2020-11-07 02:09:54,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:54,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 02:09:54,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642049065] [2020-11-07 02:09:54,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 02:09:54,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:54,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 02:09:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:09:55,000 INFO L87 Difference]: Start difference. First operand 734 states. Second operand 14 states. [2020-11-07 02:09:55,401 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:09:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:58,902 INFO L93 Difference]: Finished difference Result 815 states and 860 transitions. [2020-11-07 02:09:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 02:09:58,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 494 [2020-11-07 02:09:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:58,939 INFO L225 Difference]: With dead ends: 815 [2020-11-07 02:09:58,939 INFO L226 Difference]: Without dead ends: 538 [2020-11-07 02:09:58,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-11-07 02:09:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-11-07 02:09:59,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 518. [2020-11-07 02:09:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-11-07 02:09:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 518 transitions. [2020-11-07 02:09:59,168 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 518 transitions. Word has length 494 [2020-11-07 02:09:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:59,171 INFO L481 AbstractCegarLoop]: Abstraction has 518 states and 518 transitions. [2020-11-07 02:09:59,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 02:09:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 518 transitions. [2020-11-07 02:09:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-11-07 02:09:59,187 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:59,187 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:59,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:09:59,188 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:59,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1630903329, now seen corresponding path program 1 times [2020-11-07 02:09:59,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:59,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627395304] [2020-11-07 02:09:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:59,348 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:09:59,509 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:10:02,015 WARN L194 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:10:02,038 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:02,042 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:02,814 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:10:02,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:03,353 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 02:10:03,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627395304] [2020-11-07 02:10:03,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:03,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 02:10:03,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239313818] [2020-11-07 02:10:03,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 02:10:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 02:10:03,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-11-07 02:10:03,358 INFO L87 Difference]: Start difference. First operand 518 states and 518 transitions. Second operand 15 states. [2020-11-07 02:10:03,658 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:10:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:06,106 INFO L93 Difference]: Finished difference Result 570 states and 570 transitions. [2020-11-07 02:10:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 02:10:06,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 517 [2020-11-07 02:10:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:06,121 INFO L225 Difference]: With dead ends: 570 [2020-11-07 02:10:06,121 INFO L226 Difference]: Without dead ends: 561 [2020-11-07 02:10:06,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-11-07 02:10:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-11-07 02:10:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 541. [2020-11-07 02:10:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-11-07 02:10:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 541 transitions. [2020-11-07 02:10:06,189 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 541 transitions. Word has length 517 [2020-11-07 02:10:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:06,190 INFO L481 AbstractCegarLoop]: Abstraction has 541 states and 541 transitions. [2020-11-07 02:10:06,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 02:10:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 541 transitions. [2020-11-07 02:10:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2020-11-07 02:10:06,205 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:06,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:10:06,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:10:06,206 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:06,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1937079606, now seen corresponding path program 2 times [2020-11-07 02:10:06,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:06,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006858763] [2020-11-07 02:10:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:06,350 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:10:14,890 WARN L194 SmtUtils]: Spent 8.46 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:10:15,041 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:10:15,196 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:10:17,740 WARN L194 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:10:17,744 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:17,747 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:18,519 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:10:18,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:18,838 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 02:10:18,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006858763] [2020-11-07 02:10:18,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:18,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 02:10:18,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455796150] [2020-11-07 02:10:18,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 02:10:18,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 02:10:18,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-11-07 02:10:18,842 INFO L87 Difference]: Start difference. First operand 541 states and 541 transitions. Second operand 16 states. [2020-11-07 02:10:19,183 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:10:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:22,055 INFO L93 Difference]: Finished difference Result 593 states and 593 transitions. [2020-11-07 02:10:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 02:10:22,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 540 [2020-11-07 02:10:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:22,065 INFO L225 Difference]: With dead ends: 593 [2020-11-07 02:10:22,065 INFO L226 Difference]: Without dead ends: 584 [2020-11-07 02:10:22,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-11-07 02:10:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-11-07 02:10:22,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 564. [2020-11-07 02:10:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-11-07 02:10:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 564 transitions. [2020-11-07 02:10:22,128 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 564 transitions. Word has length 540 [2020-11-07 02:10:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:22,129 INFO L481 AbstractCegarLoop]: Abstraction has 564 states and 564 transitions. [2020-11-07 02:10:22,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 02:10:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 564 transitions. [2020-11-07 02:10:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2020-11-07 02:10:22,145 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:22,146 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:22,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:10:22,146 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:22,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1508233727, now seen corresponding path program 3 times [2020-11-07 02:10:22,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:22,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124234557] [2020-11-07 02:10:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:22,305 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:10:31,215 WARN L194 SmtUtils]: Spent 8.84 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:10:31,375 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:10:31,513 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:10:33,963 WARN L194 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:10:33,965 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:33,969 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:34,692 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:10:34,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:35,036 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 02:10:35,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124234557] [2020-11-07 02:10:35,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:35,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 02:10:35,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449703326] [2020-11-07 02:10:35,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 02:10:35,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 02:10:35,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-11-07 02:10:35,039 INFO L87 Difference]: Start difference. First operand 564 states and 564 transitions. Second operand 17 states. [2020-11-07 02:10:35,351 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:10:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:38,439 INFO L93 Difference]: Finished difference Result 616 states and 616 transitions. [2020-11-07 02:10:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 02:10:38,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 563 [2020-11-07 02:10:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:38,444 INFO L225 Difference]: With dead ends: 616 [2020-11-07 02:10:38,445 INFO L226 Difference]: Without dead ends: 607 [2020-11-07 02:10:38,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-11-07 02:10:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2020-11-07 02:10:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 587. [2020-11-07 02:10:38,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-11-07 02:10:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 587 transitions. [2020-11-07 02:10:38,497 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 587 transitions. Word has length 563 [2020-11-07 02:10:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:38,499 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 587 transitions. [2020-11-07 02:10:38,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 02:10:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 587 transitions. [2020-11-07 02:10:38,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2020-11-07 02:10:38,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:38,512 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:38,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:10:38,513 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1785713898, now seen corresponding path program 4 times [2020-11-07 02:10:38,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:38,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153225371] [2020-11-07 02:10:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:38,682 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:10:47,764 WARN L194 SmtUtils]: Spent 9.00 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:10:47,910 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:10:48,051 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:10:50,647 WARN L194 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:10:50,650 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:10:50,653 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:10:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:51,491 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:10:51,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:10:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:10:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:10:51,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153225371] [2020-11-07 02:10:51,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:10:51,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 02:10:51,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109394196] [2020-11-07 02:10:51,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 02:10:51,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:10:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 02:10:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-11-07 02:10:51,887 INFO L87 Difference]: Start difference. First operand 587 states and 587 transitions. Second operand 18 states. [2020-11-07 02:10:52,228 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:10:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:10:55,771 INFO L93 Difference]: Finished difference Result 639 states and 639 transitions. [2020-11-07 02:10:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 02:10:55,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 586 [2020-11-07 02:10:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:10:55,777 INFO L225 Difference]: With dead ends: 639 [2020-11-07 02:10:55,778 INFO L226 Difference]: Without dead ends: 630 [2020-11-07 02:10:55,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 02:10:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-11-07 02:10:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 610. [2020-11-07 02:10:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-11-07 02:10:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 610 transitions. [2020-11-07 02:10:55,836 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 610 transitions. Word has length 586 [2020-11-07 02:10:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:10:55,838 INFO L481 AbstractCegarLoop]: Abstraction has 610 states and 610 transitions. [2020-11-07 02:10:55,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 02:10:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 610 transitions. [2020-11-07 02:10:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-11-07 02:10:55,844 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:10:55,844 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:55,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:10:55,845 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:10:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:10:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash 158697503, now seen corresponding path program 5 times [2020-11-07 02:10:55,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:10:55,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856266786] [2020-11-07 02:10:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:10:56,011 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:11:05,432 WARN L194 SmtUtils]: Spent 9.33 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:11:05,592 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:11:05,735 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:11:08,298 WARN L194 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:11:08,300 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:08,304 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:09,130 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:11:09,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:09,659 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 02:11:09,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856266786] [2020-11-07 02:11:09,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:09,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-11-07 02:11:09,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284399794] [2020-11-07 02:11:09,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 02:11:09,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:09,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 02:11:09,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-11-07 02:11:09,665 INFO L87 Difference]: Start difference. First operand 610 states and 610 transitions. Second operand 19 states. [2020-11-07 02:11:10,005 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:11:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:13,713 INFO L93 Difference]: Finished difference Result 662 states and 662 transitions. [2020-11-07 02:11:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 02:11:13,714 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 609 [2020-11-07 02:11:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:13,720 INFO L225 Difference]: With dead ends: 662 [2020-11-07 02:11:13,720 INFO L226 Difference]: Without dead ends: 653 [2020-11-07 02:11:13,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 02:11:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2020-11-07 02:11:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 633. [2020-11-07 02:11:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-11-07 02:11:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 633 transitions. [2020-11-07 02:11:13,786 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 633 transitions. Word has length 609 [2020-11-07 02:11:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:13,788 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 633 transitions. [2020-11-07 02:11:13,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 02:11:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 633 transitions. [2020-11-07 02:11:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2020-11-07 02:11:13,795 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:13,796 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:13,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:11:13,796 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:13,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1894093046, now seen corresponding path program 6 times [2020-11-07 02:11:13,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:13,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490999643] [2020-11-07 02:11:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:13,946 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:11:23,206 WARN L194 SmtUtils]: Spent 9.18 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:11:23,346 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:11:23,496 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:11:25,966 WARN L194 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:11:25,970 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:25,973 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:26,821 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:11:26,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:27,427 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 02:11:27,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490999643] [2020-11-07 02:11:27,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:27,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 02:11:27,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446177685] [2020-11-07 02:11:27,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 02:11:27,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:27,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 02:11:27,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-11-07 02:11:27,431 INFO L87 Difference]: Start difference. First operand 633 states and 633 transitions. Second operand 20 states. [2020-11-07 02:11:27,782 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:11:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:31,641 INFO L93 Difference]: Finished difference Result 685 states and 685 transitions. [2020-11-07 02:11:31,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 02:11:31,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 632 [2020-11-07 02:11:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:31,647 INFO L225 Difference]: With dead ends: 685 [2020-11-07 02:11:31,647 INFO L226 Difference]: Without dead ends: 676 [2020-11-07 02:11:31,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 02:11:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-11-07 02:11:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 656. [2020-11-07 02:11:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-11-07 02:11:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 656 transitions. [2020-11-07 02:11:31,719 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 656 transitions. Word has length 632 [2020-11-07 02:11:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:31,721 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 656 transitions. [2020-11-07 02:11:31,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 02:11:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 656 transitions. [2020-11-07 02:11:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2020-11-07 02:11:31,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:31,728 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:31,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:11:31,728 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1564182079, now seen corresponding path program 7 times [2020-11-07 02:11:31,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:31,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523028967] [2020-11-07 02:11:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:31,893 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:11:41,778 WARN L194 SmtUtils]: Spent 9.79 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:11:41,936 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:11:42,092 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:11:44,784 WARN L194 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:11:44,789 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:44,791 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:45,715 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:11:45,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:46,306 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 02:11:46,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523028967] [2020-11-07 02:11:46,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:46,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 02:11:46,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577209666] [2020-11-07 02:11:46,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 02:11:46,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:46,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 02:11:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-11-07 02:11:46,312 INFO L87 Difference]: Start difference. First operand 656 states and 656 transitions. Second operand 21 states. [2020-11-07 02:11:46,668 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:11:51,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:51,112 INFO L93 Difference]: Finished difference Result 708 states and 708 transitions. [2020-11-07 02:11:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 02:11:51,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 655 [2020-11-07 02:11:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:51,118 INFO L225 Difference]: With dead ends: 708 [2020-11-07 02:11:51,119 INFO L226 Difference]: Without dead ends: 699 [2020-11-07 02:11:51,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 02:11:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-11-07 02:11:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 679. [2020-11-07 02:11:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2020-11-07 02:11:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 679 transitions. [2020-11-07 02:11:51,191 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 679 transitions. Word has length 655 [2020-11-07 02:11:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:51,192 INFO L481 AbstractCegarLoop]: Abstraction has 679 states and 679 transitions. [2020-11-07 02:11:51,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 02:11:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 679 transitions. [2020-11-07 02:11:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2020-11-07 02:11:51,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:51,199 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:51,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:11:51,200 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1150046506, now seen corresponding path program 8 times [2020-11-07 02:11:51,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:51,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064741089] [2020-11-07 02:11:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:51,366 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:12:01,152 WARN L194 SmtUtils]: Spent 9.70 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:12:01,315 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:12:01,468 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:12:04,197 WARN L194 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:12:04,200 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:04,202 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:05,237 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:12:05,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:05,693 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 02:12:05,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064741089] [2020-11-07 02:12:05,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:05,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 02:12:05,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590644566] [2020-11-07 02:12:05,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 02:12:05,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:05,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 02:12:05,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-11-07 02:12:05,698 INFO L87 Difference]: Start difference. First operand 679 states and 679 transitions. Second operand 22 states. [2020-11-07 02:12:06,039 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:12:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:10,840 INFO L93 Difference]: Finished difference Result 731 states and 731 transitions. [2020-11-07 02:12:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 02:12:10,842 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 678 [2020-11-07 02:12:10,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:10,847 INFO L225 Difference]: With dead ends: 731 [2020-11-07 02:12:10,847 INFO L226 Difference]: Without dead ends: 722 [2020-11-07 02:12:10,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 02:12:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2020-11-07 02:12:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 702. [2020-11-07 02:12:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-11-07 02:12:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 702 transitions. [2020-11-07 02:12:10,910 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 702 transitions. Word has length 678 [2020-11-07 02:12:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:10,911 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 702 transitions. [2020-11-07 02:12:10,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 02:12:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 702 transitions. [2020-11-07 02:12:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2020-11-07 02:12:10,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:10,917 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:10,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 02:12:10,918 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:10,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1048982433, now seen corresponding path program 9 times [2020-11-07 02:12:10,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:10,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146629978] [2020-11-07 02:12:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:11,091 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:12:20,261 WARN L194 SmtUtils]: Spent 9.08 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:12:20,415 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:12:20,566 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:12:23,307 WARN L194 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:12:23,309 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:23,311 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:24,375 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:12:24,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:24,933 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 02:12:24,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146629978] [2020-11-07 02:12:24,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:24,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 02:12:24,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109892735] [2020-11-07 02:12:24,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 02:12:24,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 02:12:24,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-11-07 02:12:24,936 INFO L87 Difference]: Start difference. First operand 702 states and 702 transitions. Second operand 23 states. [2020-11-07 02:12:25,293 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:12:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:30,557 INFO L93 Difference]: Finished difference Result 754 states and 754 transitions. [2020-11-07 02:12:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 02:12:30,559 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 701 [2020-11-07 02:12:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:30,563 INFO L225 Difference]: With dead ends: 754 [2020-11-07 02:12:30,563 INFO L226 Difference]: Without dead ends: 745 [2020-11-07 02:12:30,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 02:12:30,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-11-07 02:12:30,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 725. [2020-11-07 02:12:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2020-11-07 02:12:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 725 transitions. [2020-11-07 02:12:30,626 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 725 transitions. Word has length 701 [2020-11-07 02:12:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:30,627 INFO L481 AbstractCegarLoop]: Abstraction has 725 states and 725 transitions. [2020-11-07 02:12:30,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 02:12:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 725 transitions. [2020-11-07 02:12:30,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2020-11-07 02:12:30,633 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:30,634 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:30,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 02:12:30,634 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1589150902, now seen corresponding path program 10 times [2020-11-07 02:12:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:30,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276900469] [2020-11-07 02:12:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:30,786 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:12:40,681 WARN L194 SmtUtils]: Spent 9.81 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:12:40,851 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:12:41,005 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:12:43,913 WARN L194 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:12:43,916 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:43,918 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:45,087 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:12:45,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:45,847 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 02:12:45,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276900469] [2020-11-07 02:12:45,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:45,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 02:12:45,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481154706] [2020-11-07 02:12:45,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 02:12:45,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:45,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 02:12:45,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-11-07 02:12:45,850 INFO L87 Difference]: Start difference. First operand 725 states and 725 transitions. Second operand 24 states. [2020-11-07 02:12:46,225 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:12:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:51,954 INFO L93 Difference]: Finished difference Result 777 states and 777 transitions. [2020-11-07 02:12:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 02:12:51,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 724 [2020-11-07 02:12:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:51,959 INFO L225 Difference]: With dead ends: 777 [2020-11-07 02:12:51,960 INFO L226 Difference]: Without dead ends: 768 [2020-11-07 02:12:51,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 02:12:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-11-07 02:12:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 748. [2020-11-07 02:12:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2020-11-07 02:12:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 748 transitions. [2020-11-07 02:12:52,035 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 748 transitions. Word has length 724 [2020-11-07 02:12:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:52,036 INFO L481 AbstractCegarLoop]: Abstraction has 748 states and 748 transitions. [2020-11-07 02:12:52,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 02:12:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 748 transitions. [2020-11-07 02:12:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2020-11-07 02:12:52,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:52,044 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:52,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 02:12:52,044 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2129812095, now seen corresponding path program 11 times [2020-11-07 02:12:52,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:52,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282493937] [2020-11-07 02:12:52,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:52,205 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:13:02,068 WARN L194 SmtUtils]: Spent 9.77 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:13:02,228 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:13:02,383 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:13:05,219 WARN L194 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:13:05,221 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:05,224 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:06,460 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:13:06,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:07,075 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 02:13:07,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282493937] [2020-11-07 02:13:07,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:07,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 02:13:07,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271937442] [2020-11-07 02:13:07,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 02:13:07,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:07,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 02:13:07,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-11-07 02:13:07,078 INFO L87 Difference]: Start difference. First operand 748 states and 748 transitions. Second operand 25 states. [2020-11-07 02:13:07,452 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:13:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:13,641 INFO L93 Difference]: Finished difference Result 800 states and 800 transitions. [2020-11-07 02:13:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 02:13:13,642 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 747 [2020-11-07 02:13:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:13,647 INFO L225 Difference]: With dead ends: 800 [2020-11-07 02:13:13,647 INFO L226 Difference]: Without dead ends: 791 [2020-11-07 02:13:13,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 02:13:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2020-11-07 02:13:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 771. [2020-11-07 02:13:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-11-07 02:13:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2020-11-07 02:13:13,720 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 747 [2020-11-07 02:13:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:13,721 INFO L481 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2020-11-07 02:13:13,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 02:13:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2020-11-07 02:13:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2020-11-07 02:13:13,726 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:13,727 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:13,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 02:13:13,727 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:13,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:13,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1471287958, now seen corresponding path program 12 times [2020-11-07 02:13:13,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:13,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557023781] [2020-11-07 02:13:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:13,902 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:13:23,521 WARN L194 SmtUtils]: Spent 9.53 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:13:23,693 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:13:23,860 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:13:26,767 WARN L194 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:13:26,769 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:26,771 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:28,074 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:13:28,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:28,684 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 02:13:28,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557023781] [2020-11-07 02:13:28,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:28,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 02:13:28,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116086553] [2020-11-07 02:13:28,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 02:13:28,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:28,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 02:13:28,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-11-07 02:13:28,688 INFO L87 Difference]: Start difference. First operand 771 states and 771 transitions. Second operand 26 states. [2020-11-07 02:13:29,065 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:13:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:35,294 INFO L93 Difference]: Finished difference Result 823 states and 823 transitions. [2020-11-07 02:13:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 02:13:35,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 770 [2020-11-07 02:13:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:35,298 INFO L225 Difference]: With dead ends: 823 [2020-11-07 02:13:35,298 INFO L226 Difference]: Without dead ends: 814 [2020-11-07 02:13:35,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 02:13:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-11-07 02:13:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 794. [2020-11-07 02:13:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-11-07 02:13:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 794 transitions. [2020-11-07 02:13:35,399 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 794 transitions. Word has length 770 [2020-11-07 02:13:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:35,400 INFO L481 AbstractCegarLoop]: Abstraction has 794 states and 794 transitions. [2020-11-07 02:13:35,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 02:13:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 794 transitions. [2020-11-07 02:13:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2020-11-07 02:13:35,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:35,408 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:35,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 02:13:35,409 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:35,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash -622382945, now seen corresponding path program 13 times [2020-11-07 02:13:35,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:35,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827438253] [2020-11-07 02:13:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:35,573 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:13:45,371 WARN L194 SmtUtils]: Spent 9.72 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:13:45,534 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:13:45,676 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:13:48,342 WARN L194 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:13:48,344 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:48,347 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:49,837 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:13:49,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:50,480 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 02:13:50,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827438253] [2020-11-07 02:13:50,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:50,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 02:13:50,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472823483] [2020-11-07 02:13:50,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 02:13:50,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 02:13:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-11-07 02:13:50,483 INFO L87 Difference]: Start difference. First operand 794 states and 794 transitions. Second operand 27 states. [2020-11-07 02:13:50,877 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:13:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:57,970 INFO L93 Difference]: Finished difference Result 846 states and 846 transitions. [2020-11-07 02:13:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 02:13:57,972 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 793 [2020-11-07 02:13:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:57,976 INFO L225 Difference]: With dead ends: 846 [2020-11-07 02:13:57,976 INFO L226 Difference]: Without dead ends: 837 [2020-11-07 02:13:57,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 02:13:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-11-07 02:13:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 817. [2020-11-07 02:13:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2020-11-07 02:13:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 817 transitions. [2020-11-07 02:13:58,069 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 817 transitions. Word has length 793 [2020-11-07 02:13:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:58,069 INFO L481 AbstractCegarLoop]: Abstraction has 817 states and 817 transitions. [2020-11-07 02:13:58,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 02:13:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 817 transitions. [2020-11-07 02:13:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2020-11-07 02:13:58,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:58,078 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:58,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 02:13:58,079 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:58,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1763813258, now seen corresponding path program 14 times [2020-11-07 02:13:58,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:58,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264438045] [2020-11-07 02:13:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:58,248 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:14:08,979 WARN L194 SmtUtils]: Spent 10.64 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:14:09,153 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:14:09,310 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:14:12,376 WARN L194 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:14:12,378 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:12,381 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:13,899 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:14:13,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:14,603 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 02:14:14,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264438045] [2020-11-07 02:14:14,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:14,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 02:14:14,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35898756] [2020-11-07 02:14:14,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 02:14:14,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 02:14:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-11-07 02:14:14,606 INFO L87 Difference]: Start difference. First operand 817 states and 817 transitions. Second operand 28 states. [2020-11-07 02:14:15,002 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:14:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:22,702 INFO L93 Difference]: Finished difference Result 869 states and 869 transitions. [2020-11-07 02:14:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-07 02:14:22,704 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 816 [2020-11-07 02:14:22,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:22,707 INFO L225 Difference]: With dead ends: 869 [2020-11-07 02:14:22,707 INFO L226 Difference]: Without dead ends: 860 [2020-11-07 02:14:22,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 02:14:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-11-07 02:14:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 840. [2020-11-07 02:14:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-11-07 02:14:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 840 transitions. [2020-11-07 02:14:22,797 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 840 transitions. Word has length 816 [2020-11-07 02:14:22,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:22,798 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 840 transitions. [2020-11-07 02:14:22,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 02:14:22,798 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 840 transitions. [2020-11-07 02:14:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-11-07 02:14:22,806 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:22,807 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:22,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 02:14:22,807 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:22,808 INFO L82 PathProgramCache]: Analyzing trace with hash 924470975, now seen corresponding path program 15 times [2020-11-07 02:14:22,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:22,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849998656] [2020-11-07 02:14:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:22,984 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:14:33,173 WARN L194 SmtUtils]: Spent 10.10 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:14:33,360 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:14:33,521 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:14:36,623 WARN L194 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:14:36,625 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:36,627 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,196 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:14:38,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:38,937 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 02:14:38,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849998656] [2020-11-07 02:14:38,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:38,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 02:14:38,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934289094] [2020-11-07 02:14:38,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 02:14:38,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:38,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 02:14:38,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-11-07 02:14:38,939 INFO L87 Difference]: Start difference. First operand 840 states and 840 transitions. Second operand 29 states. [2020-11-07 02:14:39,359 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:14:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:47,632 INFO L93 Difference]: Finished difference Result 892 states and 892 transitions. [2020-11-07 02:14:47,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 02:14:47,634 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 839 [2020-11-07 02:14:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:47,637 INFO L225 Difference]: With dead ends: 892 [2020-11-07 02:14:47,638 INFO L226 Difference]: Without dead ends: 883 [2020-11-07 02:14:47,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 02:14:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2020-11-07 02:14:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 863. [2020-11-07 02:14:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-11-07 02:14:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 863 transitions. [2020-11-07 02:14:47,730 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 863 transitions. Word has length 839 [2020-11-07 02:14:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:47,731 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 863 transitions. [2020-11-07 02:14:47,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 02:14:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 863 transitions. [2020-11-07 02:14:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2020-11-07 02:14:47,741 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:47,742 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:47,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 02:14:47,742 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:47,743 INFO L82 PathProgramCache]: Analyzing trace with hash -532982186, now seen corresponding path program 16 times [2020-11-07 02:14:47,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:47,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398889435] [2020-11-07 02:14:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:47,955 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:14:58,691 WARN L194 SmtUtils]: Spent 10.63 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:14:58,874 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:14:59,039 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:15:01,980 WARN L194 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:15:01,983 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:01,985 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:03,626 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:15:03,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:04,421 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 02:15:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398889435] [2020-11-07 02:15:04,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:04,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-11-07 02:15:04,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848365623] [2020-11-07 02:15:04,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 02:15:04,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 02:15:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-11-07 02:15:04,423 INFO L87 Difference]: Start difference. First operand 863 states and 863 transitions. Second operand 30 states. [2020-11-07 02:15:04,813 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:15:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:13,682 INFO L93 Difference]: Finished difference Result 915 states and 915 transitions. [2020-11-07 02:15:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 02:15:13,684 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 862 [2020-11-07 02:15:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:13,688 INFO L225 Difference]: With dead ends: 915 [2020-11-07 02:15:13,688 INFO L226 Difference]: Without dead ends: 906 [2020-11-07 02:15:13,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 02:15:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-11-07 02:15:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 886. [2020-11-07 02:15:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-11-07 02:15:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 886 transitions. [2020-11-07 02:15:13,775 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 886 transitions. Word has length 862 [2020-11-07 02:15:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:13,776 INFO L481 AbstractCegarLoop]: Abstraction has 886 states and 886 transitions. [2020-11-07 02:15:13,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 02:15:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 886 transitions. [2020-11-07 02:15:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 886 [2020-11-07 02:15:13,785 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:13,785 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:13,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 02:15:13,786 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:13,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:13,786 INFO L82 PathProgramCache]: Analyzing trace with hash 835564767, now seen corresponding path program 17 times [2020-11-07 02:15:13,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:13,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628778954] [2020-11-07 02:15:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:13,965 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:15:25,434 WARN L194 SmtUtils]: Spent 11.37 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:15:25,608 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:15:25,785 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:15:28,890 WARN L194 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:15:28,892 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:28,895 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:30,792 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:15:30,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:31,644 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 02:15:31,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628778954] [2020-11-07 02:15:31,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:31,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 02:15:31,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508218886] [2020-11-07 02:15:31,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 02:15:31,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:31,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 02:15:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-11-07 02:15:31,647 INFO L87 Difference]: Start difference. First operand 886 states and 886 transitions. Second operand 31 states. [2020-11-07 02:15:32,090 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:15:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:42,267 INFO L93 Difference]: Finished difference Result 938 states and 938 transitions. [2020-11-07 02:15:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-07 02:15:42,269 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 885 [2020-11-07 02:15:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:42,273 INFO L225 Difference]: With dead ends: 938 [2020-11-07 02:15:42,273 INFO L226 Difference]: Without dead ends: 929 [2020-11-07 02:15:42,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 02:15:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2020-11-07 02:15:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 909. [2020-11-07 02:15:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 909 states. [2020-11-07 02:15:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 909 transitions. [2020-11-07 02:15:42,362 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 909 transitions. Word has length 885 [2020-11-07 02:15:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:42,363 INFO L481 AbstractCegarLoop]: Abstraction has 909 states and 909 transitions. [2020-11-07 02:15:42,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 02:15:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 909 transitions. [2020-11-07 02:15:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-11-07 02:15:42,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:42,385 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:42,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 02:15:42,385 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1421407178, now seen corresponding path program 18 times [2020-11-07 02:15:42,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:42,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2881930] [2020-11-07 02:15:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:42,585 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:15:53,776 WARN L194 SmtUtils]: Spent 11.09 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:15:53,964 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:15:54,139 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:15:57,362 WARN L194 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:15:57,365 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:57,367 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:59,346 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:15:59,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:00,361 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 02:16:00,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2881930] [2020-11-07 02:16:00,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:16:00,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-11-07 02:16:00,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185786165] [2020-11-07 02:16:00,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 02:16:00,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:16:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 02:16:00,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-11-07 02:16:00,363 INFO L87 Difference]: Start difference. First operand 909 states and 909 transitions. Second operand 32 states. [2020-11-07 02:16:00,816 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:16:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:16:11,883 INFO L93 Difference]: Finished difference Result 961 states and 961 transitions. [2020-11-07 02:16:11,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 02:16:11,884 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 908 [2020-11-07 02:16:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:16:11,887 INFO L225 Difference]: With dead ends: 961 [2020-11-07 02:16:11,888 INFO L226 Difference]: Without dead ends: 952 [2020-11-07 02:16:11,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 02:16:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-11-07 02:16:11,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 932. [2020-11-07 02:16:11,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2020-11-07 02:16:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 932 transitions. [2020-11-07 02:16:11,982 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 932 transitions. Word has length 908 [2020-11-07 02:16:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:16:11,983 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 932 transitions. [2020-11-07 02:16:11,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 02:16:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 932 transitions. [2020-11-07 02:16:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 932 [2020-11-07 02:16:11,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:16:11,992 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:11,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 02:16:11,993 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:16:11,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:16:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -977050881, now seen corresponding path program 19 times [2020-11-07 02:16:11,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:16:11,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256237643] [2020-11-07 02:16:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:16:12,192 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:16:23,785 WARN L194 SmtUtils]: Spent 11.49 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:16:23,988 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:16:24,167 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:16:27,326 WARN L194 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:16:27,330 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:16:27,332 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:16:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:29,522 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:16:29,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:16:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:30,459 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 02:16:30,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256237643] [2020-11-07 02:16:30,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:16:30,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 02:16:30,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82229439] [2020-11-07 02:16:30,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 02:16:30,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:16:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 02:16:30,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 02:16:30,462 INFO L87 Difference]: Start difference. First operand 932 states and 932 transitions. Second operand 33 states. [2020-11-07 02:16:30,910 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:16:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:16:42,839 INFO L93 Difference]: Finished difference Result 984 states and 984 transitions. [2020-11-07 02:16:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 02:16:42,841 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 931 [2020-11-07 02:16:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:16:42,845 INFO L225 Difference]: With dead ends: 984 [2020-11-07 02:16:42,845 INFO L226 Difference]: Without dead ends: 975 [2020-11-07 02:16:42,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 02:16:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2020-11-07 02:16:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 955. [2020-11-07 02:16:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-11-07 02:16:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 955 transitions. [2020-11-07 02:16:42,951 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 955 transitions. Word has length 931 [2020-11-07 02:16:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:16:42,952 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 955 transitions. [2020-11-07 02:16:42,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 02:16:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 955 transitions. [2020-11-07 02:16:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2020-11-07 02:16:42,962 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:16:42,963 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:42,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 02:16:42,963 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:16:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:16:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash 50297366, now seen corresponding path program 20 times [2020-11-07 02:16:42,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:16:42,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115367000] [2020-11-07 02:16:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:16:43,165 WARN L194 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:16:55,333 WARN L194 SmtUtils]: Spent 12.06 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:16:55,519 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:16:55,702 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:16:59,128 WARN L194 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:16:59,131 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:16:59,133 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:16:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:01,374 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:17:01,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:17:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:02,324 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 02:17:02,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115367000] [2020-11-07 02:17:02,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:17:02,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-11-07 02:17:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356297019] [2020-11-07 02:17:02,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 02:17:02,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:17:02,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 02:17:02,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 02:17:02,327 INFO L87 Difference]: Start difference. First operand 955 states and 955 transitions. Second operand 34 states. [2020-11-07 02:17:02,802 WARN L194 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:17:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:17:16,024 INFO L93 Difference]: Finished difference Result 1007 states and 1007 transitions. [2020-11-07 02:17:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-07 02:17:16,026 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 954 [2020-11-07 02:17:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:17:16,031 INFO L225 Difference]: With dead ends: 1007 [2020-11-07 02:17:16,031 INFO L226 Difference]: Without dead ends: 998 [2020-11-07 02:17:16,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 02:17:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2020-11-07 02:17:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 978. [2020-11-07 02:17:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-11-07 02:17:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 978 transitions. [2020-11-07 02:17:16,136 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 978 transitions. Word has length 954 [2020-11-07 02:17:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:17:16,137 INFO L481 AbstractCegarLoop]: Abstraction has 978 states and 978 transitions. [2020-11-07 02:17:16,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 02:17:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 978 transitions. [2020-11-07 02:17:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2020-11-07 02:17:16,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:17:16,147 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:16,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 02:17:16,147 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:17:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:17:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1782405407, now seen corresponding path program 21 times [2020-11-07 02:17:16,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:17:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279290193] [2020-11-07 02:17:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:17:16,342 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:17:27,574 WARN L194 SmtUtils]: Spent 11.13 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:17:27,750 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:17:27,929 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:17:31,193 WARN L194 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:17:31,196 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:17:31,198 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:17:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:33,539 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:17:33,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:17:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:34,528 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 02:17:34,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279290193] [2020-11-07 02:17:34,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:17:34,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 02:17:34,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180669186] [2020-11-07 02:17:34,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 02:17:34,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:17:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 02:17:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 02:17:34,531 INFO L87 Difference]: Start difference. First operand 978 states and 978 transitions. Second operand 35 states. [2020-11-07 02:17:34,986 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:17:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:17:47,512 INFO L93 Difference]: Finished difference Result 1030 states and 1030 transitions. [2020-11-07 02:17:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 02:17:47,520 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 977 [2020-11-07 02:17:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:17:47,526 INFO L225 Difference]: With dead ends: 1030 [2020-11-07 02:17:47,526 INFO L226 Difference]: Without dead ends: 1021 [2020-11-07 02:17:47,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 02:17:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-11-07 02:17:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 1001. [2020-11-07 02:17:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-11-07 02:17:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1001 transitions. [2020-11-07 02:17:47,622 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1001 transitions. Word has length 977 [2020-11-07 02:17:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:17:47,623 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1001 transitions. [2020-11-07 02:17:47,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 02:17:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1001 transitions. [2020-11-07 02:17:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2020-11-07 02:17:47,633 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:17:47,634 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:47,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 02:17:47,634 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:17:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:17:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1709350902, now seen corresponding path program 22 times [2020-11-07 02:17:47,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:17:47,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647400118] [2020-11-07 02:17:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:17:47,834 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:17:59,505 WARN L194 SmtUtils]: Spent 11.57 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:17:59,699 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:17:59,886 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:18:03,224 WARN L194 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:18:03,227 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:18:03,234 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:18:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:18:05,712 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:18:05,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:18:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:18:06,813 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 02:18:06,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647400118] [2020-11-07 02:18:06,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:18:06,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-11-07 02:18:06,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802109131] [2020-11-07 02:18:06,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 02:18:06,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:18:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 02:18:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 02:18:06,816 INFO L87 Difference]: Start difference. First operand 1001 states and 1001 transitions. Second operand 36 states. [2020-11-07 02:18:07,305 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:18:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:18:21,445 INFO L93 Difference]: Finished difference Result 1053 states and 1053 transitions. [2020-11-07 02:18:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 02:18:21,447 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 1000 [2020-11-07 02:18:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:18:21,452 INFO L225 Difference]: With dead ends: 1053 [2020-11-07 02:18:21,452 INFO L226 Difference]: Without dead ends: 1044 [2020-11-07 02:18:21,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-11-07 02:18:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2020-11-07 02:18:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1024. [2020-11-07 02:18:21,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-11-07 02:18:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1024 transitions. [2020-11-07 02:18:21,536 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1024 transitions. Word has length 1000 [2020-11-07 02:18:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:18:21,537 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 1024 transitions. [2020-11-07 02:18:21,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 02:18:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1024 transitions. [2020-11-07 02:18:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2020-11-07 02:18:21,544 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:18:21,545 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:21,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 02:18:21,545 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:18:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:18:21,546 INFO L82 PathProgramCache]: Analyzing trace with hash 855480127, now seen corresponding path program 23 times [2020-11-07 02:18:21,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:18:21,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576925310] [2020-11-07 02:18:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:18:21,750 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:18:21,857 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 02:18:33,399 WARN L194 SmtUtils]: Spent 11.54 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:18:33,592 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:18:33,780 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:18:37,100 WARN L194 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:18:37,103 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:18:37,104 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:18:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:18:39,680 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:18:39,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:18:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:18:40,840 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 02:18:40,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576925310] [2020-11-07 02:18:40,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:18:40,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 02:18:40,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881354129] [2020-11-07 02:18:40,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 02:18:40,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:18:40,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 02:18:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 02:18:40,843 INFO L87 Difference]: Start difference. First operand 1024 states and 1024 transitions. Second operand 37 states. [2020-11-07 02:18:41,312 WARN L194 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:18:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:18:56,216 INFO L93 Difference]: Finished difference Result 1076 states and 1076 transitions. [2020-11-07 02:18:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-07 02:18:56,217 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1023 [2020-11-07 02:18:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:18:56,222 INFO L225 Difference]: With dead ends: 1076 [2020-11-07 02:18:56,223 INFO L226 Difference]: Without dead ends: 1067 [2020-11-07 02:18:56,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 02:18:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-11-07 02:18:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1047. [2020-11-07 02:18:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2020-11-07 02:18:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1047 transitions. [2020-11-07 02:18:56,323 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1047 transitions. Word has length 1023 [2020-11-07 02:18:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:18:56,324 INFO L481 AbstractCegarLoop]: Abstraction has 1047 states and 1047 transitions. [2020-11-07 02:18:56,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 02:18:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1047 transitions. [2020-11-07 02:18:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1047 [2020-11-07 02:18:56,332 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:18:56,332 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:56,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 02:18:56,333 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:18:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:18:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1511096874, now seen corresponding path program 24 times [2020-11-07 02:18:56,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:18:56,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93865189] [2020-11-07 02:18:56,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:18:56,534 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:18:56,654 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 02:19:08,503 WARN L194 SmtUtils]: Spent 11.85 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:19:08,702 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:19:08,885 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:19:12,343 WARN L194 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:19:12,346 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:19:12,347 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:19:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:14,902 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:19:14,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:19:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:16,110 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 02:19:16,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93865189] [2020-11-07 02:19:16,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:19:16,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-11-07 02:19:16,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077983392] [2020-11-07 02:19:16,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 02:19:16,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:19:16,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 02:19:16,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 02:19:16,112 INFO L87 Difference]: Start difference. First operand 1047 states and 1047 transitions. Second operand 38 states. [2020-11-07 02:19:16,601 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:19:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:19:32,932 INFO L93 Difference]: Finished difference Result 1099 states and 1099 transitions. [2020-11-07 02:19:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 02:19:32,933 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 1046 [2020-11-07 02:19:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:19:32,937 INFO L225 Difference]: With dead ends: 1099 [2020-11-07 02:19:32,938 INFO L226 Difference]: Without dead ends: 1090 [2020-11-07 02:19:32,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-11-07 02:19:32,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2020-11-07 02:19:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1070. [2020-11-07 02:19:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-11-07 02:19:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1070 transitions. [2020-11-07 02:19:33,022 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1070 transitions. Word has length 1046 [2020-11-07 02:19:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:19:33,022 INFO L481 AbstractCegarLoop]: Abstraction has 1070 states and 1070 transitions. [2020-11-07 02:19:33,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 02:19:33,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1070 transitions. [2020-11-07 02:19:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2020-11-07 02:19:33,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:19:33,030 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:33,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 02:19:33,031 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:19:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:19:33,032 INFO L82 PathProgramCache]: Analyzing trace with hash -263840417, now seen corresponding path program 25 times [2020-11-07 02:19:33,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:19:33,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601776290] [2020-11-07 02:19:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:19:33,247 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:19:33,355 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 02:19:46,369 WARN L194 SmtUtils]: Spent 13.01 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:19:46,573 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:19:46,773 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:19:50,426 WARN L194 SmtUtils]: Spent 3.65 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:19:50,429 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:19:50,431 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:19:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:53,200 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:19:53,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:19:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:54,489 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 02:19:54,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601776290] [2020-11-07 02:19:54,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:19:54,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 02:19:54,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977898614] [2020-11-07 02:19:54,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 02:19:54,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:19:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 02:19:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 02:19:54,492 INFO L87 Difference]: Start difference. First operand 1070 states and 1070 transitions. Second operand 39 states. [2020-11-07 02:19:55,001 WARN L194 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:20:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:20:12,768 INFO L93 Difference]: Finished difference Result 1122 states and 1122 transitions. [2020-11-07 02:20:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 02:20:12,770 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 1069 [2020-11-07 02:20:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:20:12,774 INFO L225 Difference]: With dead ends: 1122 [2020-11-07 02:20:12,774 INFO L226 Difference]: Without dead ends: 1113 [2020-11-07 02:20:12,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 02:20:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2020-11-07 02:20:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1093. [2020-11-07 02:20:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2020-11-07 02:20:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1093 transitions. [2020-11-07 02:20:12,859 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1093 transitions. Word has length 1069 [2020-11-07 02:20:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:20:12,860 INFO L481 AbstractCegarLoop]: Abstraction has 1093 states and 1093 transitions. [2020-11-07 02:20:12,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 02:20:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1093 transitions. [2020-11-07 02:20:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1093 [2020-11-07 02:20:12,869 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:20:12,869 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:12,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 02:20:12,869 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:20:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:20:12,870 INFO L82 PathProgramCache]: Analyzing trace with hash -928967754, now seen corresponding path program 26 times [2020-11-07 02:20:12,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:20:12,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482668623] [2020-11-07 02:20:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:20:13,085 WARN L194 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:20:13,195 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 02:20:26,033 WARN L194 SmtUtils]: Spent 12.83 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:20:26,254 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:20:26,447 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:20:30,035 WARN L194 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:20:30,037 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:20:30,039 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:20:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:32,939 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:20:32,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:20:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:34,293 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 02:20:34,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482668623] [2020-11-07 02:20:34,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:20:34,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-11-07 02:20:34,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994713019] [2020-11-07 02:20:34,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 02:20:34,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:20:34,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 02:20:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 02:20:34,296 INFO L87 Difference]: Start difference. First operand 1093 states and 1093 transitions. Second operand 40 states. [2020-11-07 02:20:34,825 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:20:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:20:55,531 INFO L93 Difference]: Finished difference Result 1145 states and 1145 transitions. [2020-11-07 02:20:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-07 02:20:55,533 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1092 [2020-11-07 02:20:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:20:55,539 INFO L225 Difference]: With dead ends: 1145 [2020-11-07 02:20:55,539 INFO L226 Difference]: Without dead ends: 1136 [2020-11-07 02:20:55,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 02:20:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2020-11-07 02:20:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1116. [2020-11-07 02:20:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1116 states. [2020-11-07 02:20:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1116 transitions. [2020-11-07 02:20:55,644 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1116 transitions. Word has length 1092 [2020-11-07 02:20:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:20:55,644 INFO L481 AbstractCegarLoop]: Abstraction has 1116 states and 1116 transitions. [2020-11-07 02:20:55,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 02:20:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1116 transitions. [2020-11-07 02:20:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1116 [2020-11-07 02:20:55,653 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:20:55,653 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:55,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 02:20:55,654 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:20:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:20:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1322838911, now seen corresponding path program 27 times [2020-11-07 02:20:55,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:20:55,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093373266] [2020-11-07 02:20:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:20:55,905 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:20:56,061 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 02:21:11,007 WARN L194 SmtUtils]: Spent 14.94 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:21:11,237 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:21:11,474 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:21:15,622 WARN L194 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:21:15,625 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:21:15,627 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:21:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:19,259 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:21:19,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:21:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:20,672 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 02:21:20,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093373266] [2020-11-07 02:21:20,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:21:20,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 02:21:20,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139462083] [2020-11-07 02:21:20,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 02:21:20,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:21:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 02:21:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 02:21:20,674 INFO L87 Difference]: Start difference. First operand 1116 states and 1116 transitions. Second operand 41 states. [2020-11-07 02:21:21,303 WARN L194 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:21:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:21:47,930 INFO L93 Difference]: Finished difference Result 1168 states and 1168 transitions. [2020-11-07 02:21:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 02:21:47,933 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 1115 [2020-11-07 02:21:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:21:47,938 INFO L225 Difference]: With dead ends: 1168 [2020-11-07 02:21:47,938 INFO L226 Difference]: Without dead ends: 1159 [2020-11-07 02:21:47,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 02:21:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2020-11-07 02:21:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1139. [2020-11-07 02:21:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-07 02:21:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1139 transitions. [2020-11-07 02:21:48,057 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1139 transitions. Word has length 1115 [2020-11-07 02:21:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:21:48,058 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1139 transitions. [2020-11-07 02:21:48,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 02:21:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1139 transitions. [2020-11-07 02:21:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1139 [2020-11-07 02:21:48,077 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:21:48,077 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:21:48,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 02:21:48,078 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:21:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:21:48,078 INFO L82 PathProgramCache]: Analyzing trace with hash -419929706, now seen corresponding path program 28 times [2020-11-07 02:21:48,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:21:48,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694762053] [2020-11-07 02:21:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:21:48,326 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:21:48,461 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 02:22:04,540 WARN L194 SmtUtils]: Spent 16.07 s on a formula simplification. DAG size of input: 233 DAG size of output: 230 [2020-11-07 02:22:04,806 WARN L194 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-07 02:22:05,039 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-07 02:22:09,423 WARN L194 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-11-07 02:22:09,426 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:22:09,428 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:22:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:22:13,311 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 02:22:13,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:22:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:22:14,707 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 02:22:14,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694762053] [2020-11-07 02:22:14,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:22:14,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-11-07 02:22:14,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84307205] [2020-11-07 02:22:14,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 02:22:14,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:22:14,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 02:22:14,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 02:22:14,709 INFO L87 Difference]: Start difference. First operand 1139 states and 1139 transitions. Second operand 42 states. [2020-11-07 02:22:15,349 WARN L194 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 02:22:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:22:44,893 INFO L93 Difference]: Finished difference Result 1191 states and 1191 transitions. [2020-11-07 02:22:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 02:22:44,896 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 1138 [2020-11-07 02:22:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:22:44,902 INFO L225 Difference]: With dead ends: 1191 [2020-11-07 02:22:44,902 INFO L226 Difference]: Without dead ends: 1182 [2020-11-07 02:22:44,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 02:22:44,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2020-11-07 02:22:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1162. [2020-11-07 02:22:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-11-07 02:22:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1162 transitions. [2020-11-07 02:22:45,057 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1162 transitions. Word has length 1138 [2020-11-07 02:22:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:22:45,058 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1162 transitions. [2020-11-07 02:22:45,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 02:22:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1162 transitions. [2020-11-07 02:22:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1162 [2020-11-07 02:22:45,067 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:22:45,068 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:45,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 02:22:45,068 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:22:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:22:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash -134741601, now seen corresponding path program 29 times [2020-11-07 02:22:45,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:22:45,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501783207] [2020-11-07 02:22:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:22:45,338 WARN L194 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:22:45,492 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 57