/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 17:11:04,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 17:11:04,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 17:11:04,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 17:11:04,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 17:11:04,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 17:11:04,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 17:11:04,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 17:11:04,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 17:11:04,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 17:11:04,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 17:11:04,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 17:11:04,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 17:11:04,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 17:11:04,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 17:11:04,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 17:11:04,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 17:11:04,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 17:11:04,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 17:11:04,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 17:11:04,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 17:11:04,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 17:11:04,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 17:11:04,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 17:11:04,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 17:11:04,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 17:11:04,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 17:11:04,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 17:11:04,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 17:11:04,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 17:11:04,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 17:11:04,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 17:11:04,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 17:11:04,520 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 17:11:04,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 17:11:04,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 17:11:04,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 17:11:04,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 17:11:04,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 17:11:04,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 17:11:04,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 17:11:04,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 17:11:04,523 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 17:11:04,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 17:11:04,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 17:11:04,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 17:11:04,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 17:11:04,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 17:11:04,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 17:11:04,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 17:11:04,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:11:04,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 17:11:04,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 17:11:04,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 17:11:04,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 17:11:04,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 17:11:04,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 17:11:04,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 17:11:04,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 17:11:04,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 17:11:04,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 17:11:04,835 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 17:11:04,836 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 17:11:04,837 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 17:11:04,837 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 17:11:04,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a9982b3/a6dbd9838a574ea19a362726ae04219f/FLAGedfad0ce9 [2020-08-22 17:11:05,678 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 17:11:05,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 17:11:05,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a9982b3/a6dbd9838a574ea19a362726ae04219f/FLAGedfad0ce9 [2020-08-22 17:11:05,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a9982b3/a6dbd9838a574ea19a362726ae04219f [2020-08-22 17:11:05,837 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 17:11:05,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 17:11:05,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 17:11:05,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 17:11:05,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 17:11:05,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:11:05" (1/1) ... [2020-08-22 17:11:05,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4c78ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:05, skipping insertion in model container [2020-08-22 17:11:05,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:11:05" (1/1) ... [2020-08-22 17:11:05,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 17:11:06,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 17:11:07,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:11:07,693 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 17:11:09,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:11:09,178 INFO L208 MainTranslator]: Completed translation [2020-08-22 17:11:09,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09 WrapperNode [2020-08-22 17:11:09,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 17:11:09,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 17:11:09,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 17:11:09,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 17:11:09,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09" (1/1) ... [2020-08-22 17:11:09,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09" (1/1) ... [2020-08-22 17:11:09,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09" (1/1) ... [2020-08-22 17:11:09,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09" (1/1) ... [2020-08-22 17:11:09,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09" (1/1) ... [2020-08-22 17:11:09,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09" (1/1) ... [2020-08-22 17:11:09,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09" (1/1) ... [2020-08-22 17:11:09,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 17:11:09,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 17:11:09,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 17:11:09,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 17:11:09,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09" (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 [2020-08-22 17:11:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 17:11:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 17:11:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 17:11:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 17:11:09,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 17:11:09,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 17:11:09,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 17:11:09,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 17:11:09,489 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 17:11:09,490 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 17:11:09,490 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 17:11:09,491 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 17:11:09,491 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 17:11:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 17:11:09,492 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 17:11:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 17:11:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 17:11:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 17:11:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 17:11:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 17:11:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 17:11:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 17:11:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 17:11:13,734 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 17:11:13,735 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 17:11:13,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:11:13 BoogieIcfgContainer [2020-08-22 17:11:13,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 17:11:13,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 17:11:13,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 17:11:13,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 17:11:13,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:11:05" (1/3) ... [2020-08-22 17:11:13,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4246f4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:11:13, skipping insertion in model container [2020-08-22 17:11:13,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:11:09" (2/3) ... [2020-08-22 17:11:13,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4246f4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:11:13, skipping insertion in model container [2020-08-22 17:11:13,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:11:13" (3/3) ... [2020-08-22 17:11:13,761 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 17:11:13,772 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 17:11:13,785 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-22 17:11:13,801 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-22 17:11:13,831 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 17:11:13,832 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 17:11:13,832 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 17:11:13,832 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 17:11:13,832 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 17:11:13,832 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 17:11:13,833 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 17:11:13,833 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 17:11:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-08-22 17:11:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-08-22 17:11:13,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:11:13,927 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] [2020-08-22 17:11:13,928 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:11:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:11:13,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-08-22 17:11:13,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:11:13,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481482024] [2020-08-22 17:11:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:11:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:17,324 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:11:17,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:11:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:11:17,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481482024] [2020-08-22 17:11:17,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:11:17,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:11:17,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92030321] [2020-08-22 17:11:17,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:11:17,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:11:17,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:11:17,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:11:17,855 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 5 states. [2020-08-22 17:11:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:11:33,950 INFO L93 Difference]: Finished difference Result 4125 states and 7467 transitions. [2020-08-22 17:11:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 17:11:33,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-08-22 17:11:33,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:11:33,992 INFO L225 Difference]: With dead ends: 4125 [2020-08-22 17:11:33,992 INFO L226 Difference]: Without dead ends: 2741 [2020-08-22 17:11:34,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:11:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2020-08-22 17:11:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2688. [2020-08-22 17:11:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-08-22 17:11:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4398 transitions. [2020-08-22 17:11:34,252 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4398 transitions. Word has length 473 [2020-08-22 17:11:34,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:11:34,258 INFO L479 AbstractCegarLoop]: Abstraction has 2688 states and 4398 transitions. [2020-08-22 17:11:34,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:11:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4398 transitions. [2020-08-22 17:11:34,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-08-22 17:11:34,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:11:34,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:11:34,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 17:11:34,282 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:11:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:11:34,283 INFO L82 PathProgramCache]: Analyzing trace with hash -369254340, now seen corresponding path program 1 times [2020-08-22 17:11:34,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:11:34,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165653360] [2020-08-22 17:11:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:11:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:35,861 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:11:35,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:11:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:11:36,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165653360] [2020-08-22 17:11:36,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:11:36,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:11:36,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428089548] [2020-08-22 17:11:36,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:11:36,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:11:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:11:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:36,323 INFO L87 Difference]: Start difference. First operand 2688 states and 4398 transitions. Second operand 4 states. [2020-08-22 17:11:53,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:11:53,697 INFO L93 Difference]: Finished difference Result 7793 states and 12713 transitions. [2020-08-22 17:11:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:11:53,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-08-22 17:11:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:11:53,737 INFO L225 Difference]: With dead ends: 7793 [2020-08-22 17:11:53,738 INFO L226 Difference]: Without dead ends: 5319 [2020-08-22 17:11:53,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2020-08-22 17:11:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5268. [2020-08-22 17:11:53,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2020-08-22 17:11:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8596 transitions. [2020-08-22 17:11:53,953 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8596 transitions. Word has length 475 [2020-08-22 17:11:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:11:53,955 INFO L479 AbstractCegarLoop]: Abstraction has 5268 states and 8596 transitions. [2020-08-22 17:11:53,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:11:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8596 transitions. [2020-08-22 17:11:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 17:11:53,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:11:53,980 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] [2020-08-22 17:11:53,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 17:11:53,981 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:11:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:11:53,982 INFO L82 PathProgramCache]: Analyzing trace with hash -567190772, now seen corresponding path program 1 times [2020-08-22 17:11:53,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:11:53,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973304708] [2020-08-22 17:11:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:11:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:54,967 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:11:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:11:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:11:55,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973304708] [2020-08-22 17:11:55,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:11:55,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:11:55,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031139152] [2020-08-22 17:11:55,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:11:55,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:11:55,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:11:55,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:55,143 INFO L87 Difference]: Start difference. First operand 5268 states and 8596 transitions. Second operand 4 states. [2020-08-22 17:12:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:12:11,871 INFO L93 Difference]: Finished difference Result 15707 states and 25620 transitions. [2020-08-22 17:12:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:12:11,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-08-22 17:12:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:12:11,916 INFO L225 Difference]: With dead ends: 15707 [2020-08-22 17:12:11,917 INFO L226 Difference]: Without dead ends: 10491 [2020-08-22 17:12:11,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:11,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2020-08-22 17:12:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 5315. [2020-08-22 17:12:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2020-08-22 17:12:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8670 transitions. [2020-08-22 17:12:12,182 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8670 transitions. Word has length 476 [2020-08-22 17:12:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:12:12,182 INFO L479 AbstractCegarLoop]: Abstraction has 5315 states and 8670 transitions. [2020-08-22 17:12:12,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:12:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8670 transitions. [2020-08-22 17:12:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-08-22 17:12:12,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:12:12,207 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] [2020-08-22 17:12:12,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 17:12:12,208 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:12:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:12:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1389649697, now seen corresponding path program 1 times [2020-08-22 17:12:12,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:12:12,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729168067] [2020-08-22 17:12:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:12:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:13,381 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:12:13,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:12:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:12:13,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729168067] [2020-08-22 17:12:13,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:12:13,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:12:13,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409577374] [2020-08-22 17:12:13,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:12:13,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:12:13,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:12:13,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:13,761 INFO L87 Difference]: Start difference. First operand 5315 states and 8670 transitions. Second operand 4 states. [2020-08-22 17:12:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:12:30,963 INFO L93 Difference]: Finished difference Result 15285 states and 24839 transitions. [2020-08-22 17:12:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:12:30,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-08-22 17:12:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:12:31,000 INFO L225 Difference]: With dead ends: 15285 [2020-08-22 17:12:31,000 INFO L226 Difference]: Without dead ends: 10369 [2020-08-22 17:12:31,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2020-08-22 17:12:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 10320. [2020-08-22 17:12:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10320 states. [2020-08-22 17:12:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10320 states to 10320 states and 16752 transitions. [2020-08-22 17:12:31,389 INFO L78 Accepts]: Start accepts. Automaton has 10320 states and 16752 transitions. Word has length 477 [2020-08-22 17:12:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:12:31,390 INFO L479 AbstractCegarLoop]: Abstraction has 10320 states and 16752 transitions. [2020-08-22 17:12:31,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:12:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 10320 states and 16752 transitions. [2020-08-22 17:12:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-08-22 17:12:31,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:12:31,421 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] [2020-08-22 17:12:31,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 17:12:31,422 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:12:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:12:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash 464533692, now seen corresponding path program 1 times [2020-08-22 17:12:31,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:12:31,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945782228] [2020-08-22 17:12:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:12:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:32,314 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:12:32,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:12:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:12:32,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945782228] [2020-08-22 17:12:32,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:12:32,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:12:32,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321821632] [2020-08-22 17:12:32,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:12:32,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:12:32,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:12:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:32,541 INFO L87 Difference]: Start difference. First operand 10320 states and 16752 transitions. Second operand 4 states. [2020-08-22 17:12:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:12:50,617 INFO L93 Difference]: Finished difference Result 30704 states and 49811 transitions. [2020-08-22 17:12:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:12:50,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-08-22 17:12:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:12:50,660 INFO L225 Difference]: With dead ends: 30704 [2020-08-22 17:12:50,660 INFO L226 Difference]: Without dead ends: 20528 [2020-08-22 17:12:50,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20528 states. [2020-08-22 17:12:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20528 to 10418. [2020-08-22 17:12:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10418 states. [2020-08-22 17:12:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10418 states to 10418 states and 16903 transitions. [2020-08-22 17:12:51,127 INFO L78 Accepts]: Start accepts. Automaton has 10418 states and 16903 transitions. Word has length 477 [2020-08-22 17:12:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:12:51,127 INFO L479 AbstractCegarLoop]: Abstraction has 10418 states and 16903 transitions. [2020-08-22 17:12:51,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:12:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10418 states and 16903 transitions. [2020-08-22 17:12:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-08-22 17:12:51,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:12:51,146 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] [2020-08-22 17:12:51,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 17:12:51,147 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:12:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:12:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1703695035, now seen corresponding path program 1 times [2020-08-22 17:12:51,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:12:51,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107416577] [2020-08-22 17:12:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:12:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:51,991 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:12:51,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:12:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:12:52,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107416577] [2020-08-22 17:12:52,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:12:52,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:12:52,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284074304] [2020-08-22 17:12:52,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:12:52,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:12:52,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:12:52,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:52,307 INFO L87 Difference]: Start difference. First operand 10418 states and 16903 transitions. Second operand 4 states. [2020-08-22 17:13:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:13:10,734 INFO L93 Difference]: Finished difference Result 30839 states and 49992 transitions. [2020-08-22 17:13:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:13:10,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-08-22 17:13:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:13:10,773 INFO L225 Difference]: With dead ends: 30839 [2020-08-22 17:13:10,773 INFO L226 Difference]: Without dead ends: 20645 [2020-08-22 17:13:10,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:13:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20645 states. [2020-08-22 17:13:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20645 to 10535. [2020-08-22 17:13:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10535 states. [2020-08-22 17:13:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 17049 transitions. [2020-08-22 17:13:11,221 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 17049 transitions. Word has length 478 [2020-08-22 17:13:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:13:11,221 INFO L479 AbstractCegarLoop]: Abstraction has 10535 states and 17049 transitions. [2020-08-22 17:13:11,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:13:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 17049 transitions. [2020-08-22 17:13:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-08-22 17:13:11,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:13:11,239 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] [2020-08-22 17:13:11,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 17:13:11,240 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:13:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:13:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2050355686, now seen corresponding path program 1 times [2020-08-22 17:13:11,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:13:11,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279394569] [2020-08-22 17:13:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:13:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:12,348 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:13:12,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:13:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:13:12,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279394569] [2020-08-22 17:13:12,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:13:12,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:13:12,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906479212] [2020-08-22 17:13:12,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:13:12,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:13:12,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:13:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:13:12,692 INFO L87 Difference]: Start difference. First operand 10535 states and 17049 transitions. Second operand 4 states. [2020-08-22 17:13:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:13:31,427 INFO L93 Difference]: Finished difference Result 29921 states and 48292 transitions. [2020-08-22 17:13:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:13:31,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-08-22 17:13:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:13:31,465 INFO L225 Difference]: With dead ends: 29921 [2020-08-22 17:13:31,465 INFO L226 Difference]: Without dead ends: 20355 [2020-08-22 17:13:31,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:13:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2020-08-22 17:13:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 20308. [2020-08-22 17:13:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20308 states. [2020-08-22 17:13:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20308 states to 20308 states and 32714 transitions. [2020-08-22 17:13:32,291 INFO L78 Accepts]: Start accepts. Automaton has 20308 states and 32714 transitions. Word has length 479 [2020-08-22 17:13:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:13:32,291 INFO L479 AbstractCegarLoop]: Abstraction has 20308 states and 32714 transitions. [2020-08-22 17:13:32,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:13:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20308 states and 32714 transitions. [2020-08-22 17:13:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-08-22 17:13:32,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:13:32,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:13:32,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 17:13:32,316 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:13:32,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:13:32,316 INFO L82 PathProgramCache]: Analyzing trace with hash 421785385, now seen corresponding path program 1 times [2020-08-22 17:13:32,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:13:32,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332340366] [2020-08-22 17:13:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:13:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:33,812 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:13:33,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:13:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:13:34,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332340366] [2020-08-22 17:13:34,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:13:34,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:13:34,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167646287] [2020-08-22 17:13:34,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:13:34,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:13:34,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:13:34,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:13:34,043 INFO L87 Difference]: Start difference. First operand 20308 states and 32714 transitions. Second operand 5 states. [2020-08-22 17:13:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:13:49,737 INFO L93 Difference]: Finished difference Result 48200 states and 78307 transitions. [2020-08-22 17:13:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:13:49,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-08-22 17:13:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:13:49,772 INFO L225 Difference]: With dead ends: 48200 [2020-08-22 17:13:49,772 INFO L226 Difference]: Without dead ends: 24710 [2020-08-22 17:13:49,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:13:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24710 states. [2020-08-22 17:13:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24710 to 24654. [2020-08-22 17:13:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24654 states. [2020-08-22 17:13:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24654 states to 24654 states and 39929 transitions. [2020-08-22 17:13:51,708 INFO L78 Accepts]: Start accepts. Automaton has 24654 states and 39929 transitions. Word has length 479 [2020-08-22 17:13:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:13:51,709 INFO L479 AbstractCegarLoop]: Abstraction has 24654 states and 39929 transitions. [2020-08-22 17:13:51,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:13:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 24654 states and 39929 transitions. [2020-08-22 17:13:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-08-22 17:13:51,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:13:51,734 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] [2020-08-22 17:13:51,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 17:13:51,734 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:13:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:13:51,734 INFO L82 PathProgramCache]: Analyzing trace with hash -144584500, now seen corresponding path program 1 times [2020-08-22 17:13:51,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:13:51,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057765875] [2020-08-22 17:13:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:13:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:52,840 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:13:52,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:13:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:13:53,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057765875] [2020-08-22 17:13:53,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:13:53,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:13:53,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328203187] [2020-08-22 17:13:53,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:13:53,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:13:53,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:13:53,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:13:53,298 INFO L87 Difference]: Start difference. First operand 24654 states and 39929 transitions. Second operand 4 states. [2020-08-22 17:14:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:13,849 INFO L93 Difference]: Finished difference Result 72114 states and 116848 transitions. [2020-08-22 17:14:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:13,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-08-22 17:14:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:13,896 INFO L225 Difference]: With dead ends: 72114 [2020-08-22 17:14:13,896 INFO L226 Difference]: Without dead ends: 48480 [2020-08-22 17:14:13,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48480 states. [2020-08-22 17:14:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48480 to 48442. [2020-08-22 17:14:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48442 states. [2020-08-22 17:14:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48442 states to 48442 states and 78181 transitions. [2020-08-22 17:14:15,816 INFO L78 Accepts]: Start accepts. Automaton has 48442 states and 78181 transitions. Word has length 481 [2020-08-22 17:14:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:15,816 INFO L479 AbstractCegarLoop]: Abstraction has 48442 states and 78181 transitions. [2020-08-22 17:14:15,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 48442 states and 78181 transitions. [2020-08-22 17:14:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-08-22 17:14:15,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:15,860 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] [2020-08-22 17:14:15,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 17:14:15,861 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1057078058, now seen corresponding path program 1 times [2020-08-22 17:14:15,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:15,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013359164] [2020-08-22 17:14:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:16,749 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:14:16,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:16,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013359164] [2020-08-22 17:14:16,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:16,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:16,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206581006] [2020-08-22 17:14:16,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:16,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:16,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:16,923 INFO L87 Difference]: Start difference. First operand 48442 states and 78181 transitions. Second operand 4 states. [2020-08-22 17:14:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:31,383 INFO L93 Difference]: Finished difference Result 140578 states and 226573 transitions. [2020-08-22 17:14:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:31,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-08-22 17:14:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:31,473 INFO L225 Difference]: With dead ends: 140578 [2020-08-22 17:14:31,473 INFO L226 Difference]: Without dead ends: 94529 [2020-08-22 17:14:31,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94529 states. [2020-08-22 17:14:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94529 to 48832. [2020-08-22 17:14:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48832 states. [2020-08-22 17:14:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48832 states to 48832 states and 78757 transitions. [2020-08-22 17:14:35,637 INFO L78 Accepts]: Start accepts. Automaton has 48832 states and 78757 transitions. Word has length 482 [2020-08-22 17:14:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:35,638 INFO L479 AbstractCegarLoop]: Abstraction has 48832 states and 78757 transitions. [2020-08-22 17:14:35,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:35,638 INFO L276 IsEmpty]: Start isEmpty. Operand 48832 states and 78757 transitions. [2020-08-22 17:14:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-08-22 17:14:35,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:35,691 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] [2020-08-22 17:14:35,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 17:14:35,691 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:35,692 INFO L82 PathProgramCache]: Analyzing trace with hash 70611185, now seen corresponding path program 1 times [2020-08-22 17:14:35,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:35,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467187016] [2020-08-22 17:14:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:36,749 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:14:36,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:37,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467187016] [2020-08-22 17:14:37,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:37,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:37,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225023232] [2020-08-22 17:14:37,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:37,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:37,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:37,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:37,047 INFO L87 Difference]: Start difference. First operand 48832 states and 78757 transitions. Second operand 4 states. [2020-08-22 17:15:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:02,169 INFO L93 Difference]: Finished difference Result 141955 states and 228801 transitions. [2020-08-22 17:15:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:02,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-08-22 17:15:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:02,271 INFO L225 Difference]: With dead ends: 141955 [2020-08-22 17:15:02,272 INFO L226 Difference]: Without dead ends: 95973 [2020-08-22 17:15:02,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95973 states. [2020-08-22 17:15:06,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95973 to 95937. [2020-08-22 17:15:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95937 states. [2020-08-22 17:15:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95937 states to 95937 states and 154156 transitions. [2020-08-22 17:15:06,310 INFO L78 Accepts]: Start accepts. Automaton has 95937 states and 154156 transitions. Word has length 483 [2020-08-22 17:15:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:06,310 INFO L479 AbstractCegarLoop]: Abstraction has 95937 states and 154156 transitions. [2020-08-22 17:15:06,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 95937 states and 154156 transitions. [2020-08-22 17:15:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-08-22 17:15:06,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:06,387 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] [2020-08-22 17:15:06,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 17:15:06,387 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:06,388 INFO L82 PathProgramCache]: Analyzing trace with hash 167240436, now seen corresponding path program 1 times [2020-08-22 17:15:06,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:06,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264302289] [2020-08-22 17:15:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:08,327 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:15:08,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:08,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264302289] [2020-08-22 17:15:08,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:08,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:15:08,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778731208] [2020-08-22 17:15:08,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:15:08,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:15:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:15:08,611 INFO L87 Difference]: Start difference. First operand 95937 states and 154156 transitions. Second operand 5 states. [2020-08-22 17:15:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:31,523 INFO L93 Difference]: Finished difference Result 235606 states and 381258 transitions. [2020-08-22 17:15:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:15:31,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 483 [2020-08-22 17:15:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:31,650 INFO L225 Difference]: With dead ends: 235606 [2020-08-22 17:15:31,650 INFO L226 Difference]: Without dead ends: 121441 [2020-08-22 17:15:31,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:15:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121441 states. [2020-08-22 17:15:39,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121441 to 121356. [2020-08-22 17:15:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121356 states. [2020-08-22 17:15:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121356 states to 121356 states and 195892 transitions. [2020-08-22 17:15:39,276 INFO L78 Accepts]: Start accepts. Automaton has 121356 states and 195892 transitions. Word has length 483 [2020-08-22 17:15:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:39,277 INFO L479 AbstractCegarLoop]: Abstraction has 121356 states and 195892 transitions. [2020-08-22 17:15:39,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:15:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 121356 states and 195892 transitions. [2020-08-22 17:15:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-08-22 17:15:39,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:39,460 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] [2020-08-22 17:15:39,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 17:15:39,461 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash 11218692, now seen corresponding path program 1 times [2020-08-22 17:15:39,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:39,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378344811] [2020-08-22 17:15:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:40,868 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:15:40,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:41,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378344811] [2020-08-22 17:15:41,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:41,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:41,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913361166] [2020-08-22 17:15:41,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:41,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:41,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:41,481 INFO L87 Difference]: Start difference. First operand 121356 states and 195892 transitions. Second operand 4 states. [2020-08-22 17:15:42,328 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification that was a NOOP. DAG size: 387 [2020-08-22 17:16:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:04,630 INFO L93 Difference]: Finished difference Result 221246 states and 346342 transitions. [2020-08-22 17:16:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:16:04,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-08-22 17:16:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:04,813 INFO L225 Difference]: With dead ends: 221246 [2020-08-22 17:16:04,814 INFO L226 Difference]: Without dead ends: 171145 [2020-08-22 17:16:04,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:16:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171145 states. [2020-08-22 17:16:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171145 to 170764. [2020-08-22 17:16:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170764 states. [2020-08-22 17:16:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170764 states to 170764 states and 269116 transitions. [2020-08-22 17:16:13,166 INFO L78 Accepts]: Start accepts. Automaton has 170764 states and 269116 transitions. Word has length 485 [2020-08-22 17:16:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:13,167 INFO L479 AbstractCegarLoop]: Abstraction has 170764 states and 269116 transitions. [2020-08-22 17:16:13,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:16:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 170764 states and 269116 transitions. [2020-08-22 17:16:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-08-22 17:16:13,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:13,309 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] [2020-08-22 17:16:13,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 17:16:13,309 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash 784767583, now seen corresponding path program 1 times [2020-08-22 17:16:13,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:13,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101876574] [2020-08-22 17:16:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:18,287 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:16:18,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:18,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101876574] [2020-08-22 17:16:18,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:18,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 17:16:18,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58454759] [2020-08-22 17:16:18,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 17:16:18,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:18,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 17:16:18,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-08-22 17:16:18,723 INFO L87 Difference]: Start difference. First operand 170764 states and 269116 transitions. Second operand 18 states. [2020-08-22 17:16:19,780 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-08-22 17:16:32,760 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-08-22 17:16:35,077 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-08-22 17:16:39,736 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-08-22 17:17:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:17:16,669 INFO L93 Difference]: Finished difference Result 458459 states and 713349 transitions. [2020-08-22 17:17:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 17:17:16,671 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 485 [2020-08-22 17:17:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:17:17,152 INFO L225 Difference]: With dead ends: 458459 [2020-08-22 17:17:17,152 INFO L226 Difference]: Without dead ends: 443454 [2020-08-22 17:17:17,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=732, Invalid=1920, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 17:17:17,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443454 states. [2020-08-22 17:17:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443454 to 222444. [2020-08-22 17:17:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222444 states. [2020-08-22 17:17:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222444 states to 222444 states and 348524 transitions. [2020-08-22 17:17:39,571 INFO L78 Accepts]: Start accepts. Automaton has 222444 states and 348524 transitions. Word has length 485 [2020-08-22 17:17:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:17:39,572 INFO L479 AbstractCegarLoop]: Abstraction has 222444 states and 348524 transitions. [2020-08-22 17:17:39,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 17:17:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 222444 states and 348524 transitions. [2020-08-22 17:17:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-08-22 17:17:39,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:17:39,729 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] [2020-08-22 17:17:39,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 17:17:39,729 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:17:39,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:17:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1866960202, now seen corresponding path program 1 times [2020-08-22 17:17:39,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:17:39,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038296817] [2020-08-22 17:17:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:17:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:41,751 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:17:41,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:17:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:17:42,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038296817] [2020-08-22 17:17:42,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:17:42,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 17:17:42,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074017999] [2020-08-22 17:17:42,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 17:17:42,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:17:42,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 17:17:42,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-22 17:17:42,131 INFO L87 Difference]: Start difference. First operand 222444 states and 348524 transitions. Second operand 14 states. [2020-08-22 17:17:43,511 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 421 [2020-08-22 17:18:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:18:24,282 INFO L93 Difference]: Finished difference Result 306366 states and 476424 transitions. [2020-08-22 17:18:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 17:18:24,283 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 485 [2020-08-22 17:18:24,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:18:24,563 INFO L225 Difference]: With dead ends: 306366 [2020-08-22 17:18:24,563 INFO L226 Difference]: Without dead ends: 267041 [2020-08-22 17:18:24,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 17:18:24,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267041 states. [2020-08-22 17:18:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267041 to 183276. [2020-08-22 17:18:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183276 states. [2020-08-22 17:18:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183276 states to 183276 states and 287116 transitions. [2020-08-22 17:18:42,799 INFO L78 Accepts]: Start accepts. Automaton has 183276 states and 287116 transitions. Word has length 485 [2020-08-22 17:18:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:18:42,800 INFO L479 AbstractCegarLoop]: Abstraction has 183276 states and 287116 transitions. [2020-08-22 17:18:42,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 17:18:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 183276 states and 287116 transitions. [2020-08-22 17:18:42,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-08-22 17:18:42,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:18:42,954 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] [2020-08-22 17:18:42,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 17:18:42,955 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:18:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:18:42,956 INFO L82 PathProgramCache]: Analyzing trace with hash 296961277, now seen corresponding path program 1 times [2020-08-22 17:18:42,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:18:42,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793067575] [2020-08-22 17:18:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:18:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:45,281 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:18:45,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:18:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:18:45,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793067575] [2020-08-22 17:18:45,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:18:45,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 17:18:45,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649134405] [2020-08-22 17:18:45,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 17:18:45,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:18:45,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 17:18:45,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 17:18:45,646 INFO L87 Difference]: Start difference. First operand 183276 states and 287116 transitions. Second operand 14 states. [2020-08-22 17:18:46,819 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification that was a NOOP. DAG size: 421 [2020-08-22 17:19:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:19:29,580 INFO L93 Difference]: Finished difference Result 269134 states and 420440 transitions. [2020-08-22 17:19:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 17:19:29,582 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 485 [2020-08-22 17:19:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:19:29,850 INFO L225 Difference]: With dead ends: 269134 [2020-08-22 17:19:29,850 INFO L226 Difference]: Without dead ends: 254129 [2020-08-22 17:19:29,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 17:19:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254129 states. [2020-08-22 17:19:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254129 to 193756. [2020-08-22 17:19:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193756 states. [2020-08-22 17:19:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193756 states to 193756 states and 302108 transitions. [2020-08-22 17:19:48,658 INFO L78 Accepts]: Start accepts. Automaton has 193756 states and 302108 transitions. Word has length 485 [2020-08-22 17:19:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:19:48,659 INFO L479 AbstractCegarLoop]: Abstraction has 193756 states and 302108 transitions. [2020-08-22 17:19:48,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 17:19:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 193756 states and 302108 transitions. [2020-08-22 17:19:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-08-22 17:19:48,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:19:48,823 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] [2020-08-22 17:19:48,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 17:19:48,824 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:19:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:19:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1379153896, now seen corresponding path program 1 times [2020-08-22 17:19:48,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:19:48,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318402623] [2020-08-22 17:19:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:19:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:50,414 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:19:50,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:19:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:19:50,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318402623] [2020-08-22 17:19:50,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:19:50,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:19:50,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591887500] [2020-08-22 17:19:50,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:19:50,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:19:50,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:19:50,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:19:50,640 INFO L87 Difference]: Start difference. First operand 193756 states and 302108 transitions. Second operand 5 states. [2020-08-22 17:20:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:20:38,306 INFO L93 Difference]: Finished difference Result 565768 states and 881331 transitions. [2020-08-22 17:20:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:20:38,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2020-08-22 17:20:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:20:38,725 INFO L225 Difference]: With dead ends: 565768 [2020-08-22 17:20:38,725 INFO L226 Difference]: Without dead ends: 376214 [2020-08-22 17:20:38,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:20:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376214 states. [2020-08-22 17:21:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376214 to 376161. [2020-08-22 17:21:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376161 states. [2020-08-22 17:21:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376161 states to 376161 states and 583882 transitions. [2020-08-22 17:21:15,287 INFO L78 Accepts]: Start accepts. Automaton has 376161 states and 583882 transitions. Word has length 485 [2020-08-22 17:21:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:21:15,288 INFO L479 AbstractCegarLoop]: Abstraction has 376161 states and 583882 transitions. [2020-08-22 17:21:15,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:21:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 376161 states and 583882 transitions. [2020-08-22 17:21:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-08-22 17:21:15,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:21:15,622 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] [2020-08-22 17:21:15,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 17:21:15,622 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:21:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:21:15,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1009787566, now seen corresponding path program 1 times [2020-08-22 17:21:15,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:21:15,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965199164] [2020-08-22 17:21:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:21:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:16,791 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-08-22 17:21:16,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:21:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:21:17,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965199164] [2020-08-22 17:21:17,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:21:17,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:21:17,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614099936] [2020-08-22 17:21:17,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:21:17,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:21:17,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:21:17,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:21:17,025 INFO L87 Difference]: Start difference. First operand 376161 states and 583882 transitions. Second operand 4 states. [2020-08-22 17:22:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:22:43,498 INFO L93 Difference]: Finished difference Result 1118890 states and 1736202 transitions. [2020-08-22 17:22:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:22:43,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-08-22 17:22:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:22:44,403 INFO L225 Difference]: With dead ends: 1118890 [2020-08-22 17:22:44,403 INFO L226 Difference]: Without dead ends: 745238 [2020-08-22 17:22:44,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:22:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745238 states.