/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 22:03:10,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 22:03:10,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 22:03:10,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 22:03:10,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 22:03:10,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 22:03:10,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 22:03:10,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 22:03:10,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 22:03:10,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 22:03:10,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 22:03:10,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 22:03:10,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 22:03:10,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 22:03:10,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 22:03:10,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 22:03:10,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 22:03:10,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 22:03:10,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 22:03:10,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 22:03:10,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 22:03:10,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 22:03:10,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 22:03:10,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 22:03:10,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 22:03:10,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 22:03:10,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 22:03:10,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 22:03:10,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 22:03:10,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 22:03:10,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 22:03:10,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 22:03:10,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 22:03:10,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 22:03:10,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 22:03:10,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 22:03:10,481 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 [2020-07-19 22:03:10,519 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 22:03:10,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 22:03:10,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 22:03:10,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 22:03:10,521 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 22:03:10,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 22:03:10,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 22:03:10,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 22:03:10,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 22:03:10,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 22:03:10,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 22:03:10,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 22:03:10,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 22:03:10,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 22:03:10,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 22:03:10,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 22:03:10,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 22:03:10,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 22:03:10,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 22:03:10,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 22:03:10,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 22:03:10,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 22:03:10,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 22:03:10,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 22:03:10,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 22:03:10,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 22:03:10,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 22:03:10,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 22:03:10,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 22:03:10,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 22:03:10,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 22:03:10,838 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 22:03:10,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 22:03:10,846 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 22:03:10,847 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 22:03:10,848 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-19 22:03:10,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64f4663ab/627005ebcaa5470d9c7769b032d19c05/FLAGaeba414b5 [2020-07-19 22:03:11,587 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 22:03:11,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-19 22:03:11,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64f4663ab/627005ebcaa5470d9c7769b032d19c05/FLAGaeba414b5 [2020-07-19 22:03:11,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64f4663ab/627005ebcaa5470d9c7769b032d19c05 [2020-07-19 22:03:11,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 22:03:11,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 22:03:11,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 22:03:11,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 22:03:11,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 22:03:11,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:03:11" (1/1) ... [2020-07-19 22:03:11,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221592ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:11, skipping insertion in model container [2020-07-19 22:03:11,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:03:11" (1/1) ... [2020-07-19 22:03:11,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 22:03:11,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 22:03:13,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 22:03:13,651 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 22:03:15,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 22:03:15,083 INFO L208 MainTranslator]: Completed translation [2020-07-19 22:03:15,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15 WrapperNode [2020-07-19 22:03:15,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 22:03:15,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 22:03:15,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 22:03:15,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 22:03:15,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15" (1/1) ... [2020-07-19 22:03:15,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15" (1/1) ... [2020-07-19 22:03:15,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15" (1/1) ... [2020-07-19 22:03:15,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15" (1/1) ... [2020-07-19 22:03:15,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15" (1/1) ... [2020-07-19 22:03:15,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15" (1/1) ... [2020-07-19 22:03:15,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15" (1/1) ... [2020-07-19 22:03:15,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 22:03:15,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 22:03:15,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 22:03:15,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 22:03:15,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15" (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 [2020-07-19 22:03:15,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 22:03:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 22:03:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 22:03:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 22:03:15,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 22:03:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-19 22:03:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-19 22:03:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-19 22:03:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 22:03:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 22:03:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-19 22:03:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-19 22:03:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-19 22:03:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-19 22:03:15,410 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-19 22:03:15,410 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-19 22:03:15,410 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-19 22:03:15,410 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-19 22:03:15,410 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-19 22:03:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 22:03:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 22:03:15,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 22:03:19,766 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 22:03:19,766 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 22:03:19,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:03:19 BoogieIcfgContainer [2020-07-19 22:03:19,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 22:03:19,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 22:03:19,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 22:03:19,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 22:03:19,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:03:11" (1/3) ... [2020-07-19 22:03:19,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e310382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:03:19, skipping insertion in model container [2020-07-19 22:03:19,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:15" (2/3) ... [2020-07-19 22:03:19,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e310382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:03:19, skipping insertion in model container [2020-07-19 22:03:19,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:03:19" (3/3) ... [2020-07-19 22:03:19,797 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-19 22:03:19,811 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 22:03:19,830 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 22:03:19,843 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 22:03:19,873 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 22:03:19,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 22:03:19,873 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 22:03:19,874 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 22:03:19,874 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 22:03:19,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 22:03:19,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 22:03:19,874 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 22:03:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-07-19 22:03:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-19 22:03:19,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:03:19,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:03:19,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:03:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:03:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-07-19 22:03:19,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:03:19,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482653945] [2020-07-19 22:03:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:03:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:23,494 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:03:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:03:23,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482653945] [2020-07-19 22:03:23,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:03:23,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:03:23,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354904911] [2020-07-19 22:03:23,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:03:23,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:03:23,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:03:23,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:03:23,939 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 5 states. [2020-07-19 22:03:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:03:40,036 INFO L93 Difference]: Finished difference Result 4236 states and 7632 transitions. [2020-07-19 22:03:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 22:03:40,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-07-19 22:03:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:03:40,078 INFO L225 Difference]: With dead ends: 4236 [2020-07-19 22:03:40,078 INFO L226 Difference]: Without dead ends: 2814 [2020-07-19 22:03:40,089 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 [2020-07-19 22:03:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-07-19 22:03:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812. [2020-07-19 22:03:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2020-07-19 22:03:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4639 transitions. [2020-07-19 22:03:40,324 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4639 transitions. Word has length 487 [2020-07-19 22:03:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:03:40,326 INFO L479 AbstractCegarLoop]: Abstraction has 2812 states and 4639 transitions. [2020-07-19 22:03:40,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:03:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4639 transitions. [2020-07-19 22:03:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-19 22:03:40,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:03:40,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:03:40,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 22:03:40,353 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:03:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:03:40,354 INFO L82 PathProgramCache]: Analyzing trace with hash 39211808, now seen corresponding path program 1 times [2020-07-19 22:03:40,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:03:40,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252363783] [2020-07-19 22:03:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:03:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:42,179 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:03:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:03:42,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252363783] [2020-07-19 22:03:42,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:03:42,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:03:42,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812170188] [2020-07-19 22:03:42,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:03:42,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:03:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:03:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:03:42,885 INFO L87 Difference]: Start difference. First operand 2812 states and 4639 transitions. Second operand 4 states. [2020-07-19 22:04:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:04:01,411 INFO L93 Difference]: Finished difference Result 8158 states and 13422 transitions. [2020-07-19 22:04:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:04:01,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-19 22:04:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:04:01,483 INFO L225 Difference]: With dead ends: 8158 [2020-07-19 22:04:01,484 INFO L226 Difference]: Without dead ends: 5560 [2020-07-19 22:04:01,490 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 [2020-07-19 22:04:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2020-07-19 22:04:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5558. [2020-07-19 22:04:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5558 states. [2020-07-19 22:04:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 9141 transitions. [2020-07-19 22:04:01,689 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 9141 transitions. Word has length 489 [2020-07-19 22:04:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:04:01,692 INFO L479 AbstractCegarLoop]: Abstraction has 5558 states and 9141 transitions. [2020-07-19 22:04:01,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:04:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 9141 transitions. [2020-07-19 22:04:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-19 22:04:01,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:04:01,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:04:01,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 22:04:01,719 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:04:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:04:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash -960654715, now seen corresponding path program 1 times [2020-07-19 22:04:01,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:04:01,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024286601] [2020-07-19 22:04:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:04:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:02,799 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:04:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:04:03,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024286601] [2020-07-19 22:04:03,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:04:03,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:04:03,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268517329] [2020-07-19 22:04:03,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:04:03,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:04:03,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:04:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:04:03,040 INFO L87 Difference]: Start difference. First operand 5558 states and 9141 transitions. Second operand 4 states. [2020-07-19 22:04:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:04:21,335 INFO L93 Difference]: Finished difference Result 16577 states and 27255 transitions. [2020-07-19 22:04:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:04:21,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-19 22:04:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:04:21,387 INFO L225 Difference]: With dead ends: 16577 [2020-07-19 22:04:21,388 INFO L226 Difference]: Without dead ends: 11071 [2020-07-19 22:04:21,401 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 [2020-07-19 22:04:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2020-07-19 22:04:21,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 5605. [2020-07-19 22:04:21,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5605 states. [2020-07-19 22:04:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 9215 transitions. [2020-07-19 22:04:21,714 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 9215 transitions. Word has length 490 [2020-07-19 22:04:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:04:21,715 INFO L479 AbstractCegarLoop]: Abstraction has 5605 states and 9215 transitions. [2020-07-19 22:04:21,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:04:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 9215 transitions. [2020-07-19 22:04:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-19 22:04:21,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:04:21,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:04:21,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 22:04:21,737 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:04:21,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:04:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1982115813, now seen corresponding path program 1 times [2020-07-19 22:04:21,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:04:21,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965944569] [2020-07-19 22:04:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:04:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:22,919 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:04:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:04:23,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965944569] [2020-07-19 22:04:23,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:04:23,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:04:23,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74266287] [2020-07-19 22:04:23,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:04:23,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:04:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:04:23,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:04:23,236 INFO L87 Difference]: Start difference. First operand 5605 states and 9215 transitions. Second operand 4 states. [2020-07-19 22:04:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:04:41,932 INFO L93 Difference]: Finished difference Result 16140 states and 26444 transitions. [2020-07-19 22:04:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:04:41,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-19 22:04:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:04:41,967 INFO L225 Difference]: With dead ends: 16140 [2020-07-19 22:04:41,968 INFO L226 Difference]: Without dead ends: 10934 [2020-07-19 22:04:41,980 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 [2020-07-19 22:04:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10934 states. [2020-07-19 22:04:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10934 to 10932. [2020-07-19 22:04:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10932 states. [2020-07-19 22:04:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10932 states to 10932 states and 17885 transitions. [2020-07-19 22:04:42,361 INFO L78 Accepts]: Start accepts. Automaton has 10932 states and 17885 transitions. Word has length 491 [2020-07-19 22:04:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:04:42,362 INFO L479 AbstractCegarLoop]: Abstraction has 10932 states and 17885 transitions. [2020-07-19 22:04:42,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:04:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10932 states and 17885 transitions. [2020-07-19 22:04:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-19 22:04:42,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:04:42,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:04:42,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 22:04:42,390 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:04:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:04:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2002117056, now seen corresponding path program 1 times [2020-07-19 22:04:42,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:04:42,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682573739] [2020-07-19 22:04:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:04:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:43,442 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:04:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:04:43,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682573739] [2020-07-19 22:04:43,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:04:43,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:04:43,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36581735] [2020-07-19 22:04:43,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:04:43,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:04:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:04:43,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:04:43,649 INFO L87 Difference]: Start difference. First operand 10932 states and 17885 transitions. Second operand 4 states. [2020-07-19 22:05:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:05:03,311 INFO L93 Difference]: Finished difference Result 32540 states and 53210 transitions. [2020-07-19 22:05:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:05:03,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-19 22:05:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:05:03,361 INFO L225 Difference]: With dead ends: 32540 [2020-07-19 22:05:03,361 INFO L226 Difference]: Without dead ends: 21752 [2020-07-19 22:05:03,390 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 [2020-07-19 22:05:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21752 states. [2020-07-19 22:05:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21752 to 11030. [2020-07-19 22:05:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11030 states. [2020-07-19 22:05:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 18036 transitions. [2020-07-19 22:05:03,970 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 18036 transitions. Word has length 491 [2020-07-19 22:05:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:05:03,971 INFO L479 AbstractCegarLoop]: Abstraction has 11030 states and 18036 transitions. [2020-07-19 22:05:03,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:05:03,971 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 18036 transitions. [2020-07-19 22:05:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-19 22:05:03,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:05:03,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:05:03,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 22:05:03,993 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:05:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:05:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1954950484, now seen corresponding path program 1 times [2020-07-19 22:05:03,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:05:03,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683259706] [2020-07-19 22:05:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:05:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:05,099 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:05:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:05:05,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683259706] [2020-07-19 22:05:05,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:05:05,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:05:05,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64973733] [2020-07-19 22:05:05,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:05:05,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:05:05,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:05:05,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:05:05,264 INFO L87 Difference]: Start difference. First operand 11030 states and 18036 transitions. Second operand 4 states. [2020-07-19 22:05:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:05:25,811 INFO L93 Difference]: Finished difference Result 32675 states and 53391 transitions. [2020-07-19 22:05:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:05:25,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-19 22:05:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:05:25,867 INFO L225 Difference]: With dead ends: 32675 [2020-07-19 22:05:25,868 INFO L226 Difference]: Without dead ends: 21869 [2020-07-19 22:05:25,890 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 [2020-07-19 22:05:25,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21869 states. [2020-07-19 22:05:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21869 to 11147. [2020-07-19 22:05:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11147 states. [2020-07-19 22:05:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 18182 transitions. [2020-07-19 22:05:26,569 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 18182 transitions. Word has length 492 [2020-07-19 22:05:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:05:26,569 INFO L479 AbstractCegarLoop]: Abstraction has 11147 states and 18182 transitions. [2020-07-19 22:05:26,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:05:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 18182 transitions. [2020-07-19 22:05:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-19 22:05:26,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:05:26,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:05:26,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 22:05:26,590 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:05:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:05:26,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1783853194, now seen corresponding path program 1 times [2020-07-19 22:05:26,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:05:26,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911717083] [2020-07-19 22:05:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:05:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:27,853 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:05:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:05:28,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911717083] [2020-07-19 22:05:28,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:05:28,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:05:28,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911235909] [2020-07-19 22:05:28,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:05:28,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:05:28,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:05:28,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:05:28,348 INFO L87 Difference]: Start difference. First operand 11147 states and 18182 transitions. Second operand 4 states. [2020-07-19 22:05:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:05:49,124 INFO L93 Difference]: Finished difference Result 31726 states and 51629 transitions. [2020-07-19 22:05:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:05:49,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-19 22:05:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:05:49,153 INFO L225 Difference]: With dead ends: 31726 [2020-07-19 22:05:49,154 INFO L226 Difference]: Without dead ends: 21548 [2020-07-19 22:05:49,173 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 [2020-07-19 22:05:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21548 states. [2020-07-19 22:05:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21548 to 21546. [2020-07-19 22:05:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21546 states. [2020-07-19 22:05:50,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21546 states to 21546 states and 34987 transitions. [2020-07-19 22:05:50,183 INFO L78 Accepts]: Start accepts. Automaton has 21546 states and 34987 transitions. Word has length 493 [2020-07-19 22:05:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:05:50,184 INFO L479 AbstractCegarLoop]: Abstraction has 21546 states and 34987 transitions. [2020-07-19 22:05:50,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:05:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 21546 states and 34987 transitions. [2020-07-19 22:05:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-19 22:05:50,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:05:50,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:05:50,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-19 22:05:50,220 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:05:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:05:50,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1122991245, now seen corresponding path program 1 times [2020-07-19 22:05:50,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:05:50,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325038819] [2020-07-19 22:05:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:05:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:52,341 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:05:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:05:52,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325038819] [2020-07-19 22:05:52,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:05:52,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:05:52,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923127700] [2020-07-19 22:05:52,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:05:52,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:05:52,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:05:52,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:05:52,582 INFO L87 Difference]: Start difference. First operand 21546 states and 34987 transitions. Second operand 5 states. [2020-07-19 22:06:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:06:09,227 INFO L93 Difference]: Finished difference Result 50854 states and 83138 transitions. [2020-07-19 22:06:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:06:09,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-19 22:06:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:06:09,257 INFO L225 Difference]: With dead ends: 50854 [2020-07-19 22:06:09,257 INFO L226 Difference]: Without dead ends: 26010 [2020-07-19 22:06:09,295 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 [2020-07-19 22:06:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2020-07-19 22:06:11,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 26008. [2020-07-19 22:06:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26008 states. [2020-07-19 22:06:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26008 states to 26008 states and 42390 transitions. [2020-07-19 22:06:11,468 INFO L78 Accepts]: Start accepts. Automaton has 26008 states and 42390 transitions. Word has length 493 [2020-07-19 22:06:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:06:11,468 INFO L479 AbstractCegarLoop]: Abstraction has 26008 states and 42390 transitions. [2020-07-19 22:06:11,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:06:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26008 states and 42390 transitions. [2020-07-19 22:06:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-19 22:06:11,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:06:11,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:06:11,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 22:06:11,495 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:06:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:06:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash -979225654, now seen corresponding path program 1 times [2020-07-19 22:06:11,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:06:11,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364346220] [2020-07-19 22:06:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:06:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:12,657 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:06:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:06:12,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364346220] [2020-07-19 22:06:12,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:06:12,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:06:12,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918566496] [2020-07-19 22:06:12,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:06:12,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:06:12,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:06:12,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:06:12,824 INFO L87 Difference]: Start difference. First operand 26008 states and 42390 transitions. Second operand 4 states. [2020-07-19 22:06:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:06:28,174 INFO L93 Difference]: Finished difference Result 46676 states and 75064 transitions. [2020-07-19 22:06:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:06:28,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-19 22:06:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:06:28,218 INFO L225 Difference]: With dead ends: 46676 [2020-07-19 22:06:28,219 INFO L226 Difference]: Without dead ends: 33210 [2020-07-19 22:06:28,242 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 [2020-07-19 22:06:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33210 states. [2020-07-19 22:06:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33210 to 29048. [2020-07-19 22:06:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29048 states. [2020-07-19 22:06:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29048 states to 29048 states and 47370 transitions. [2020-07-19 22:06:29,589 INFO L78 Accepts]: Start accepts. Automaton has 29048 states and 47370 transitions. Word has length 493 [2020-07-19 22:06:29,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:06:29,590 INFO L479 AbstractCegarLoop]: Abstraction has 29048 states and 47370 transitions. [2020-07-19 22:06:29,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:06:29,590 INFO L276 IsEmpty]: Start isEmpty. Operand 29048 states and 47370 transitions. [2020-07-19 22:06:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-19 22:06:29,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:06:29,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:06:29,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-19 22:06:29,616 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:06:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:06:29,617 INFO L82 PathProgramCache]: Analyzing trace with hash 175584375, now seen corresponding path program 1 times [2020-07-19 22:06:29,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:06:29,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132175312] [2020-07-19 22:06:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:06:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:30,762 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:06:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:06:31,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132175312] [2020-07-19 22:06:31,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:06:31,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:06:31,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060835004] [2020-07-19 22:06:31,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:06:31,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:06:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:06:31,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:06:31,258 INFO L87 Difference]: Start difference. First operand 29048 states and 47370 transitions. Second operand 4 states. [2020-07-19 22:06:54,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:06:54,700 INFO L93 Difference]: Finished difference Result 85137 states and 138885 transitions. [2020-07-19 22:06:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:06:54,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-07-19 22:06:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:06:54,766 INFO L225 Difference]: With dead ends: 85137 [2020-07-19 22:06:54,766 INFO L226 Difference]: Without dead ends: 57109 [2020-07-19 22:06:54,794 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 [2020-07-19 22:06:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57109 states. [2020-07-19 22:06:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57109 to 57107. [2020-07-19 22:06:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57107 states. [2020-07-19 22:06:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57107 states to 57107 states and 92799 transitions. [2020-07-19 22:06:57,369 INFO L78 Accepts]: Start accepts. Automaton has 57107 states and 92799 transitions. Word has length 495 [2020-07-19 22:06:57,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:06:57,369 INFO L479 AbstractCegarLoop]: Abstraction has 57107 states and 92799 transitions. [2020-07-19 22:06:57,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:06:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 57107 states and 92799 transitions. [2020-07-19 22:06:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-19 22:06:57,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:06:57,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:06:57,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-19 22:06:57,431 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:06:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:06:57,432 INFO L82 PathProgramCache]: Analyzing trace with hash 436421350, now seen corresponding path program 1 times [2020-07-19 22:06:57,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:06:57,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881075834] [2020-07-19 22:06:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:06:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:58,559 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:06:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:06:58,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881075834] [2020-07-19 22:06:58,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:06:58,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:06:58,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52182264] [2020-07-19 22:06:58,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:06:58,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:06:58,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:06:58,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:06:58,717 INFO L87 Difference]: Start difference. First operand 57107 states and 92799 transitions. Second operand 4 states. [2020-07-19 22:07:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:07:15,998 INFO L93 Difference]: Finished difference Result 104503 states and 168401 transitions. [2020-07-19 22:07:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:07:15,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-07-19 22:07:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:07:16,080 INFO L225 Difference]: With dead ends: 104503 [2020-07-19 22:07:16,080 INFO L226 Difference]: Without dead ends: 74421 [2020-07-19 22:07:16,114 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 [2020-07-19 22:07:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74421 states. [2020-07-19 22:07:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74421 to 67987. [2020-07-19 22:07:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67987 states. [2020-07-19 22:07:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67987 states to 67987 states and 110671 transitions. [2020-07-19 22:07:20,837 INFO L78 Accepts]: Start accepts. Automaton has 67987 states and 110671 transitions. Word has length 495 [2020-07-19 22:07:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:07:20,838 INFO L479 AbstractCegarLoop]: Abstraction has 67987 states and 110671 transitions. [2020-07-19 22:07:20,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:07:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 67987 states and 110671 transitions. [2020-07-19 22:07:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-19 22:07:20,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:07:20,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:07:20,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-19 22:07:20,881 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:07:20,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:07:20,882 INFO L82 PathProgramCache]: Analyzing trace with hash -925741270, now seen corresponding path program 1 times [2020-07-19 22:07:20,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:07:20,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439702418] [2020-07-19 22:07:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:07:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:07:22,380 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:07:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:07:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:07:22,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439702418] [2020-07-19 22:07:22,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:07:22,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:07:22,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739153735] [2020-07-19 22:07:22,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:07:22,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:07:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:07:22,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:07:22,542 INFO L87 Difference]: Start difference. First operand 67987 states and 110671 transitions. Second operand 4 states. [2020-07-19 22:07:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:07:40,291 INFO L93 Difference]: Finished difference Result 199213 states and 324043 transitions. [2020-07-19 22:07:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:07:40,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-19 22:07:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:07:40,445 INFO L225 Difference]: With dead ends: 199213 [2020-07-19 22:07:40,445 INFO L226 Difference]: Without dead ends: 133619 [2020-07-19 22:07:40,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:07:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133619 states. [2020-07-19 22:07:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133619 to 68377. [2020-07-19 22:07:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68377 states. [2020-07-19 22:07:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68377 states to 68377 states and 111247 transitions. [2020-07-19 22:07:44,454 INFO L78 Accepts]: Start accepts. Automaton has 68377 states and 111247 transitions. Word has length 496 [2020-07-19 22:07:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:07:44,454 INFO L479 AbstractCegarLoop]: Abstraction has 68377 states and 111247 transitions. [2020-07-19 22:07:44,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:07:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 68377 states and 111247 transitions. [2020-07-19 22:07:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-19 22:07:44,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:07:44,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:07:44,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-19 22:07:44,501 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:07:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:07:44,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1131533936, now seen corresponding path program 1 times [2020-07-19 22:07:44,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:07:44,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107662814] [2020-07-19 22:07:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:07:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:07:48,032 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:07:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:07:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:07:48,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107662814] [2020-07-19 22:07:48,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:07:48,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-19 22:07:48,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784383730] [2020-07-19 22:07:48,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 22:07:48,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:07:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 22:07:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-19 22:07:48,396 INFO L87 Difference]: Start difference. First operand 68377 states and 111247 transitions. Second operand 10 states. [2020-07-19 22:07:49,360 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:08:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:08:35,488 INFO L93 Difference]: Finished difference Result 332486 states and 535872 transitions. [2020-07-19 22:08:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 22:08:35,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 496 [2020-07-19 22:08:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:08:35,855 INFO L225 Difference]: With dead ends: 332486 [2020-07-19 22:08:35,855 INFO L226 Difference]: Without dead ends: 289604 [2020-07-19 22:08:35,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 22:08:36,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289604 states. [2020-07-19 22:08:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289604 to 189071. [2020-07-19 22:08:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189071 states. [2020-07-19 22:08:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189071 states to 189071 states and 301915 transitions. [2020-07-19 22:08:50,061 INFO L78 Accepts]: Start accepts. Automaton has 189071 states and 301915 transitions. Word has length 496 [2020-07-19 22:08:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:08:50,062 INFO L479 AbstractCegarLoop]: Abstraction has 189071 states and 301915 transitions. [2020-07-19 22:08:50,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 22:08:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 189071 states and 301915 transitions. [2020-07-19 22:08:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-19 22:08:50,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:08:50,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:08:50,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-19 22:08:50,147 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:08:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:08:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1627764272, now seen corresponding path program 1 times [2020-07-19 22:08:50,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:08:50,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948169989] [2020-07-19 22:08:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:08:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:08:53,923 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:08:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:08:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:08:54,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948169989] [2020-07-19 22:08:54,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:08:54,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 22:08:54,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374755729] [2020-07-19 22:08:54,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 22:08:54,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:08:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 22:08:54,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-19 22:08:54,235 INFO L87 Difference]: Start difference. First operand 189071 states and 301915 transitions. Second operand 9 states. [2020-07-19 22:08:55,188 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 408 [2020-07-19 22:09:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:09:21,783 INFO L93 Difference]: Finished difference Result 274695 states and 441151 transitions. [2020-07-19 22:09:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 22:09:21,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 496 [2020-07-19 22:09:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:09:22,006 INFO L225 Difference]: With dead ends: 274695 [2020-07-19 22:09:22,006 INFO L226 Difference]: Without dead ends: 147327 [2020-07-19 22:09:22,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-07-19 22:09:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147327 states. [2020-07-19 22:09:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147327 to 80321. [2020-07-19 22:09:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80321 states. [2020-07-19 22:09:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80321 states to 80321 states and 128615 transitions. [2020-07-19 22:09:28,616 INFO L78 Accepts]: Start accepts. Automaton has 80321 states and 128615 transitions. Word has length 496 [2020-07-19 22:09:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:09:28,617 INFO L479 AbstractCegarLoop]: Abstraction has 80321 states and 128615 transitions. [2020-07-19 22:09:28,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 22:09:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 80321 states and 128615 transitions. [2020-07-19 22:09:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-19 22:09:28,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:09:28,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:09:28,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-19 22:09:28,671 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:09:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:09:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash 43078897, now seen corresponding path program 1 times [2020-07-19 22:09:28,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:09:28,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231765026] [2020-07-19 22:09:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:09:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:09:30,166 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:09:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:09:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:09:30,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231765026] [2020-07-19 22:09:30,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:09:30,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:09:30,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380137379] [2020-07-19 22:09:30,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:09:30,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:09:30,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:09:30,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:09:30,430 INFO L87 Difference]: Start difference. First operand 80321 states and 128615 transitions. Second operand 5 states. [2020-07-19 22:10:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:10:01,010 INFO L93 Difference]: Finished difference Result 234928 states and 376112 transitions. [2020-07-19 22:10:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:10:01,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-19 22:10:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:10:01,267 INFO L225 Difference]: With dead ends: 234928 [2020-07-19 22:10:01,267 INFO L226 Difference]: Without dead ends: 156163 [2020-07-19 22:10:01,348 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 [2020-07-19 22:10:01,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156163 states. [2020-07-19 22:10:12,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156163 to 156161. [2020-07-19 22:10:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156161 states. [2020-07-19 22:10:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156161 states to 156161 states and 249237 transitions. [2020-07-19 22:10:12,788 INFO L78 Accepts]: Start accepts. Automaton has 156161 states and 249237 transitions. Word has length 496 [2020-07-19 22:10:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:10:12,789 INFO L479 AbstractCegarLoop]: Abstraction has 156161 states and 249237 transitions. [2020-07-19 22:10:12,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:10:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 156161 states and 249237 transitions. [2020-07-19 22:10:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-19 22:10:12,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:10:12,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:10:12,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-19 22:10:12,912 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:10:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:10:12,912 INFO L82 PathProgramCache]: Analyzing trace with hash 775267711, now seen corresponding path program 1 times [2020-07-19 22:10:12,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:10:12,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323969811] [2020-07-19 22:10:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:10:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:10:14,467 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:10:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:10:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:10:14,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323969811] [2020-07-19 22:10:14,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:10:14,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:10:14,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86501574] [2020-07-19 22:10:14,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:10:14,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:10:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:10:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:10:14,618 INFO L87 Difference]: Start difference. First operand 156161 states and 249237 transitions. Second operand 5 states. [2020-07-19 22:10:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:10:48,636 INFO L93 Difference]: Finished difference Result 358147 states and 573758 transitions. [2020-07-19 22:10:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:10:48,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 497 [2020-07-19 22:10:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:10:48,872 INFO L225 Difference]: With dead ends: 358147 [2020-07-19 22:10:48,872 INFO L226 Difference]: Without dead ends: 181401 [2020-07-19 22:10:48,990 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 [2020-07-19 22:10:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181401 states. [2020-07-19 22:11:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181401 to 181399. [2020-07-19 22:11:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181399 states. [2020-07-19 22:11:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181399 states to 181399 states and 289820 transitions. [2020-07-19 22:11:05,367 INFO L78 Accepts]: Start accepts. Automaton has 181399 states and 289820 transitions. Word has length 497 [2020-07-19 22:11:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:11:05,367 INFO L479 AbstractCegarLoop]: Abstraction has 181399 states and 289820 transitions. [2020-07-19 22:11:05,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:11:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 181399 states and 289820 transitions. [2020-07-19 22:11:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-19 22:11:05,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:11:05,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:11:05,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-19 22:11:05,497 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:11:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:11:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1196309607, now seen corresponding path program 1 times [2020-07-19 22:11:05,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:11:05,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320277231] [2020-07-19 22:11:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:11:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:11:06,672 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:11:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:11:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:11:06,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320277231] [2020-07-19 22:11:06,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:11:06,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:11:06,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998144701] [2020-07-19 22:11:06,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:11:06,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:11:06,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:11:06,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:11:06,906 INFO L87 Difference]: Start difference. First operand 181399 states and 289820 transitions. Second operand 4 states. [2020-07-19 22:11:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:11:55,745 INFO L93 Difference]: Finished difference Result 525060 states and 837778 transitions. [2020-07-19 22:11:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:11:55,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-19 22:11:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:11:56,248 INFO L225 Difference]: With dead ends: 525060 [2020-07-19 22:11:56,249 INFO L226 Difference]: Without dead ends: 353508 [2020-07-19 22:11:56,415 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 [2020-07-19 22:11:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353508 states. [2020-07-19 22:12:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353508 to 353506. [2020-07-19 22:12:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353506 states. [2020-07-19 22:12:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353506 states to 353506 states and 562743 transitions. [2020-07-19 22:12:31,535 INFO L78 Accepts]: Start accepts. Automaton has 353506 states and 562743 transitions. Word has length 498 [2020-07-19 22:12:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:12:31,536 INFO L479 AbstractCegarLoop]: Abstraction has 353506 states and 562743 transitions. [2020-07-19 22:12:31,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:12:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 353506 states and 562743 transitions. [2020-07-19 22:12:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-19 22:12:31,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:12:31,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:12:31,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-19 22:12:31,782 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:12:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:12:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash 532673534, now seen corresponding path program 1 times [2020-07-19 22:12:31,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:12:31,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580088335] [2020-07-19 22:12:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:12:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:12:33,393 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:12:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:12:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:12:33,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580088335] [2020-07-19 22:12:33,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:12:33,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:12:33,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434191995] [2020-07-19 22:12:33,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:12:33,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:12:33,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:12:33,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:12:33,590 INFO L87 Difference]: Start difference. First operand 353506 states and 562743 transitions. Second operand 5 states. [2020-07-19 22:14:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:14:34,734 INFO L93 Difference]: Finished difference Result 1291851 states and 2046826 transitions. [2020-07-19 22:14:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 22:14:34,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-07-19 22:14:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:14:36,096 INFO L225 Difference]: With dead ends: 1291851 [2020-07-19 22:14:36,096 INFO L226 Difference]: Without dead ends: 959785 [2020-07-19 22:14:36,879 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 [2020-07-19 22:14:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959785 states. [2020-07-19 22:15:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959785 to 364897. [2020-07-19 22:15:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364897 states. [2020-07-19 22:15:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364897 states to 364897 states and 581519 transitions. [2020-07-19 22:15:17,488 INFO L78 Accepts]: Start accepts. Automaton has 364897 states and 581519 transitions. Word has length 499 [2020-07-19 22:15:17,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:15:17,488 INFO L479 AbstractCegarLoop]: Abstraction has 364897 states and 581519 transitions. [2020-07-19 22:15:17,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:15:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 364897 states and 581519 transitions. [2020-07-19 22:15:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-19 22:15:17,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:15:17,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:15:17,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-19 22:15:17,716 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:15:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:15:17,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1152099056, now seen corresponding path program 1 times [2020-07-19 22:15:17,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:15:17,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228472197] [2020-07-19 22:15:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1024df57 [2020-07-19 22:15:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:15:18,954 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-19 22:15:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:15:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:15:19,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228472197] [2020-07-19 22:15:19,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:15:19,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:15:19,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225682609] [2020-07-19 22:15:19,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:15:19,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:15:19,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:15:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:15:19,112 INFO L87 Difference]: Start difference. First operand 364897 states and 581519 transitions. Second operand 4 states.