/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+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 22:02:58,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 22:02:58,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 22:02:58,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 22:02:58,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 22:02:58,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 22:02:58,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 22:02:58,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 22:02:58,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 22:02:58,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 22:02:58,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 22:02:58,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 22:02:58,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 22:02:58,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 22:02:58,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 22:02:58,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 22:02:58,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 22:02:58,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 22:02:58,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 22:02:58,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 22:02:58,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 22:02:58,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 22:02:58,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 22:02:58,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 22:02:58,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 22:02:58,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 22:02:58,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 22:02:58,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 22:02:58,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 22:02:58,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 22:02:58,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 22:02:58,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 22:02:58,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 22:02:58,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 22:02:58,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 22:02:58,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 22:02:58,430 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 22:02:58,445 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 22:02:58,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 22:02:58,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 22:02:58,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 22:02:58,447 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 22:02:58,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 22:02:58,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 22:02:58,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 22:02:58,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 22:02:58,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 22:02:58,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 22:02:58,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 22:02:58,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 22:02:58,449 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 22:02:58,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 22:02:58,449 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 22:02:58,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 22:02:58,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 22:02:58,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 22:02:58,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 22:02:58,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 22:02:58,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 22:02:58,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 22:02:58,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 22:02:58,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 22:02:58,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 22:02:58,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 22:02:58,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 22:02:58,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 22:02:58,452 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 22:02:58,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 22:02:58,757 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 22:02:58,761 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 22:02:58,763 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 22:02:58,766 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 22:02:58,767 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-19 22:02:58,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee0315e3/7ff41ec06cea4dc2ad83979220e1ccd0/FLAG195651405 [2020-07-19 22:02:59,635 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 22:02:59,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-19 22:02:59,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee0315e3/7ff41ec06cea4dc2ad83979220e1ccd0/FLAG195651405 [2020-07-19 22:02:59,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee0315e3/7ff41ec06cea4dc2ad83979220e1ccd0 [2020-07-19 22:02:59,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 22:02:59,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 22:02:59,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 22:02:59,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 22:02:59,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 22:02:59,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:02:59" (1/1) ... [2020-07-19 22:02:59,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a51889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:02:59, skipping insertion in model container [2020-07-19 22:02:59,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:02:59" (1/1) ... [2020-07-19 22:02:59,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 22:02:59,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 22:03:01,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 22:03:01,695 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 22:03:02,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 22:03:02,993 INFO L208 MainTranslator]: Completed translation [2020-07-19 22:03:02,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02 WrapperNode [2020-07-19 22:03:02,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 22:03:02,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 22:03:02,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 22:03:02,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 22:03:03,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02" (1/1) ... [2020-07-19 22:03:03,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02" (1/1) ... [2020-07-19 22:03:03,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02" (1/1) ... [2020-07-19 22:03:03,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02" (1/1) ... [2020-07-19 22:03:03,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02" (1/1) ... [2020-07-19 22:03:03,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02" (1/1) ... [2020-07-19 22:03:03,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02" (1/1) ... [2020-07-19 22:03:03,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 22:03:03,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 22:03:03,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 22:03:03,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 22:03:03,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02" (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 22:03:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 22:03:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 22:03:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 22:03:03,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 22:03:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 22:03:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-19 22:03:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-19 22:03:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-19 22:03:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 22:03:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 22:03:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-19 22:03:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-19 22:03:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-19 22:03:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-19 22:03:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-19 22:03:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-19 22:03:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-19 22:03:03,330 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-19 22:03:03,330 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-19 22:03:03,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 22:03:03,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 22:03:03,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 22:03:07,874 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 22:03:07,875 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 22:03:07,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:03:07 BoogieIcfgContainer [2020-07-19 22:03:07,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 22:03:07,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 22:03:07,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 22:03:07,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 22:03:07,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:02:59" (1/3) ... [2020-07-19 22:03:07,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9041e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:03:07, skipping insertion in model container [2020-07-19 22:03:07,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:03:02" (2/3) ... [2020-07-19 22:03:07,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9041e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:03:07, skipping insertion in model container [2020-07-19 22:03:07,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:03:07" (3/3) ... [2020-07-19 22:03:07,903 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-19 22:03:07,911 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 22:03:07,923 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-19 22:03:07,936 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-19 22:03:07,965 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 22:03:07,966 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 22:03:07,966 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 22:03:07,966 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 22:03:07,966 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 22:03:07,966 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 22:03:07,966 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 22:03:07,966 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 22:03:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-19 22:03:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-19 22:03:08,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:03:08,059 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] [2020-07-19 22:03:08,060 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:03:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:03:08,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-19 22:03:08,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:03:08,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354630528] [2020-07-19 22:03:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:03:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:11,943 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:03:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:03:12,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354630528] [2020-07-19 22:03:12,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:03:12,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:03:12,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231258927] [2020-07-19 22:03:12,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:03:12,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:03:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:03:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:03:12,934 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 5 states. [2020-07-19 22:03:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:03:29,700 INFO L93 Difference]: Finished difference Result 4394 states and 7936 transitions. [2020-07-19 22:03:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 22:03:29,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 484 [2020-07-19 22:03:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:03:29,754 INFO L225 Difference]: With dead ends: 4394 [2020-07-19 22:03:29,755 INFO L226 Difference]: Without dead ends: 2919 [2020-07-19 22:03:29,766 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 22:03:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-07-19 22:03:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-07-19 22:03:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-07-19 22:03:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions. [2020-07-19 22:03:30,045 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484 [2020-07-19 22:03:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:03:30,052 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions. [2020-07-19 22:03:30,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:03:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions. [2020-07-19 22:03:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-19 22:03:30,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:03:30,071 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] [2020-07-19 22:03:30,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 22:03:30,071 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:03:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:03:30,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times [2020-07-19 22:03:30,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:03:30,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252895006] [2020-07-19 22:03:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:03:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:31,729 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:03:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:32,246 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 22:03:32,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252895006] [2020-07-19 22:03:32,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:03:32,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:03:32,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853090400] [2020-07-19 22:03:32,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:03:32,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:03:32,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:03:32,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:03:32,252 INFO L87 Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 4 states. [2020-07-19 22:03:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:03:50,928 INFO L93 Difference]: Finished difference Result 8316 states and 13666 transitions. [2020-07-19 22:03:50,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:03:50,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-19 22:03:50,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:03:50,959 INFO L225 Difference]: With dead ends: 8316 [2020-07-19 22:03:50,959 INFO L226 Difference]: Without dead ends: 5665 [2020-07-19 22:03:50,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:03:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2020-07-19 22:03:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613. [2020-07-19 22:03:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5613 states. [2020-07-19 22:03:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9225 transitions. [2020-07-19 22:03:51,172 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 9225 transitions. Word has length 486 [2020-07-19 22:03:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:03:51,175 INFO L479 AbstractCegarLoop]: Abstraction has 5613 states and 9225 transitions. [2020-07-19 22:03:51,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:03:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 9225 transitions. [2020-07-19 22:03:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-19 22:03:51,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:03:51,192 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 22:03:51,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 22:03:51,192 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:03:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:03:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash 326918239, now seen corresponding path program 1 times [2020-07-19 22:03:51,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:03:51,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852832126] [2020-07-19 22:03:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:03:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:52,333 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:03:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:03:52,642 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 22:03:52,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852832126] [2020-07-19 22:03:52,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:03:52,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:03:52,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710647953] [2020-07-19 22:03:52,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:03:52,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:03:52,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:03:52,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:03:52,655 INFO L87 Difference]: Start difference. First operand 5613 states and 9225 transitions. Second operand 4 states. [2020-07-19 22:04:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:04:11,084 INFO L93 Difference]: Finished difference Result 16742 states and 27507 transitions. [2020-07-19 22:04:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:04:11,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-19 22:04:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:04:11,139 INFO L225 Difference]: With dead ends: 16742 [2020-07-19 22:04:11,139 INFO L226 Difference]: Without dead ends: 11181 [2020-07-19 22:04:11,153 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 22:04:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2020-07-19 22:04:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 5660. [2020-07-19 22:04:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5660 states. [2020-07-19 22:04:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 9299 transitions. [2020-07-19 22:04:11,474 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 9299 transitions. Word has length 487 [2020-07-19 22:04:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:04:11,475 INFO L479 AbstractCegarLoop]: Abstraction has 5660 states and 9299 transitions. [2020-07-19 22:04:11,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:04:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 9299 transitions. [2020-07-19 22:04:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-19 22:04:11,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:04:11,491 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] [2020-07-19 22:04:11,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 22:04:11,492 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:04:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:04:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2064835293, now seen corresponding path program 1 times [2020-07-19 22:04:11,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:04:11,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453103609] [2020-07-19 22:04:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:04:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:12,736 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:04:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:13,069 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 22:04:13,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453103609] [2020-07-19 22:04:13,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:04:13,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:04:13,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632996298] [2020-07-19 22:04:13,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:04:13,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:04:13,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:04:13,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:04:13,072 INFO L87 Difference]: Start difference. First operand 5660 states and 9299 transitions. Second operand 4 states. [2020-07-19 22:04:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:04:31,968 INFO L93 Difference]: Finished difference Result 16304 states and 26694 transitions. [2020-07-19 22:04:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:04:31,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-19 22:04:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:04:32,014 INFO L225 Difference]: With dead ends: 16304 [2020-07-19 22:04:32,014 INFO L226 Difference]: Without dead ends: 11043 [2020-07-19 22:04:32,028 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 22:04:32,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-07-19 22:04:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10993. [2020-07-19 22:04:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10993 states. [2020-07-19 22:04:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 17977 transitions. [2020-07-19 22:04:32,444 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 17977 transitions. Word has length 488 [2020-07-19 22:04:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:04:32,445 INFO L479 AbstractCegarLoop]: Abstraction has 10993 states and 17977 transitions. [2020-07-19 22:04:32,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:04:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 17977 transitions. [2020-07-19 22:04:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-19 22:04:32,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:04:32,475 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] [2020-07-19 22:04:32,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 22:04:32,476 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:04:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:04:32,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1928250536, now seen corresponding path program 1 times [2020-07-19 22:04:32,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:04:32,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278564356] [2020-07-19 22:04:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:04:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:33,545 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:04:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:33,738 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 22:04:33,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278564356] [2020-07-19 22:04:33,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:04:33,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:04:33,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178833749] [2020-07-19 22:04:33,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:04:33,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:04:33,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:04:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:04:33,740 INFO L87 Difference]: Start difference. First operand 10993 states and 17977 transitions. Second operand 4 states. [2020-07-19 22:04:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:04:53,624 INFO L93 Difference]: Finished difference Result 32723 states and 53486 transitions. [2020-07-19 22:04:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:04:53,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-19 22:04:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:04:53,673 INFO L225 Difference]: With dead ends: 32723 [2020-07-19 22:04:53,673 INFO L226 Difference]: Without dead ends: 21874 [2020-07-19 22:04:53,693 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 22:04:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21874 states. [2020-07-19 22:04:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21874 to 11091. [2020-07-19 22:04:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11091 states. [2020-07-19 22:04:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 18128 transitions. [2020-07-19 22:04:54,141 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 18128 transitions. Word has length 488 [2020-07-19 22:04:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:04:54,142 INFO L479 AbstractCegarLoop]: Abstraction has 11091 states and 18128 transitions. [2020-07-19 22:04:54,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:04:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 18128 transitions. [2020-07-19 22:04:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-19 22:04:54,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:04:54,163 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 22:04:54,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 22:04:54,164 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:04:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:04:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash 844567664, now seen corresponding path program 1 times [2020-07-19 22:04:54,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:04:54,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148143480] [2020-07-19 22:04:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:04:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:55,204 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:04:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:04:55,461 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 22:04:55,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148143480] [2020-07-19 22:04:55,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:04:55,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:04:55,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432531478] [2020-07-19 22:04:55,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:04:55,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:04:55,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:04:55,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:04:55,473 INFO L87 Difference]: Start difference. First operand 11091 states and 18128 transitions. Second operand 4 states. [2020-07-19 22:05:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:05:16,876 INFO L93 Difference]: Finished difference Result 32858 states and 53667 transitions. [2020-07-19 22:05:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:05:16,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-19 22:05:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:05:16,923 INFO L225 Difference]: With dead ends: 32858 [2020-07-19 22:05:16,924 INFO L226 Difference]: Without dead ends: 21991 [2020-07-19 22:05:16,944 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 22:05:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21991 states. [2020-07-19 22:05:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21991 to 11208. [2020-07-19 22:05:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11208 states. [2020-07-19 22:05:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 18274 transitions. [2020-07-19 22:05:17,430 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 18274 transitions. Word has length 489 [2020-07-19 22:05:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:05:17,431 INFO L479 AbstractCegarLoop]: Abstraction has 11208 states and 18274 transitions. [2020-07-19 22:05:17,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:05:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 18274 transitions. [2020-07-19 22:05:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-19 22:05:17,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:05:17,450 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 22:05:17,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 22:05:17,451 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:05:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:05:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2127508510, now seen corresponding path program 1 times [2020-07-19 22:05:17,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:05:17,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52221522] [2020-07-19 22:05:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:05:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:18,707 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:05:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:19,050 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 22:05:19,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52221522] [2020-07-19 22:05:19,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:05:19,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:05:19,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951171851] [2020-07-19 22:05:19,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:05:19,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:05:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:05:19,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:05:19,054 INFO L87 Difference]: Start difference. First operand 11208 states and 18274 transitions. Second operand 4 states. [2020-07-19 22:05:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:05:32,939 INFO L93 Difference]: Finished difference Result 21557 states and 34732 transitions. [2020-07-19 22:05:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:05:32,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-19 22:05:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:05:32,976 INFO L225 Difference]: With dead ends: 21557 [2020-07-19 22:05:32,976 INFO L226 Difference]: Without dead ends: 14874 [2020-07-19 22:05:32,988 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 22:05:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14874 states. [2020-07-19 22:05:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14874 to 12752. [2020-07-19 22:05:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12752 states. [2020-07-19 22:05:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 20834 transitions. [2020-07-19 22:05:33,518 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 20834 transitions. Word has length 490 [2020-07-19 22:05:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:05:33,519 INFO L479 AbstractCegarLoop]: Abstraction has 12752 states and 20834 transitions. [2020-07-19 22:05:33,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:05:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 20834 transitions. [2020-07-19 22:05:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-19 22:05:33,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:05:33,533 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 22:05:33,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-19 22:05:33,533 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:05:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:05:33,534 INFO L82 PathProgramCache]: Analyzing trace with hash -667258338, now seen corresponding path program 1 times [2020-07-19 22:05:33,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:05:33,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423652506] [2020-07-19 22:05:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:05:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:34,912 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:05:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:05:35,259 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 22:05:35,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423652506] [2020-07-19 22:05:35,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:05:35,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:05:35,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307386704] [2020-07-19 22:05:35,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:05:35,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:05:35,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:05:35,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:05:35,262 INFO L87 Difference]: Start difference. First operand 12752 states and 20834 transitions. Second operand 4 states. [2020-07-19 22:05:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:05:56,656 INFO L93 Difference]: Finished difference Result 36492 states and 59503 transitions. [2020-07-19 22:05:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:05:56,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-19 22:05:56,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:05:56,694 INFO L225 Difference]: With dead ends: 36492 [2020-07-19 22:05:56,694 INFO L226 Difference]: Without dead ends: 24709 [2020-07-19 22:05:56,717 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 22:05:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24709 states. [2020-07-19 22:05:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24709 to 24661. [2020-07-19 22:05:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24661 states. [2020-07-19 22:05:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 40123 transitions. [2020-07-19 22:05:57,969 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 40123 transitions. Word has length 490 [2020-07-19 22:05:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:05:57,969 INFO L479 AbstractCegarLoop]: Abstraction has 24661 states and 40123 transitions. [2020-07-19 22:05:57,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:05:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 40123 transitions. [2020-07-19 22:05:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-19 22:05:57,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:05:57,994 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 22:05:57,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 22:05:57,994 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:05:57,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:05:57,995 INFO L82 PathProgramCache]: Analyzing trace with hash 656055547, now seen corresponding path program 1 times [2020-07-19 22:05:57,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:05:57,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95680069] [2020-07-19 22:05:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:05:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:00,386 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:06:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:06:00,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95680069] [2020-07-19 22:06:00,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:06:00,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:06:00,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923293310] [2020-07-19 22:06:00,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:06:00,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:06:00,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:06:00,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:06:00,621 INFO L87 Difference]: Start difference. First operand 24661 states and 40123 transitions. Second operand 5 states. [2020-07-19 22:06:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:06:21,824 INFO L93 Difference]: Finished difference Result 57139 states and 93438 transitions. [2020-07-19 22:06:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:06:21,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 490 [2020-07-19 22:06:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:06:21,864 INFO L225 Difference]: With dead ends: 57139 [2020-07-19 22:06:21,864 INFO L226 Difference]: Without dead ends: 29180 [2020-07-19 22:06:21,889 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 22:06:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29180 states. [2020-07-19 22:06:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29180 to 29123. [2020-07-19 22:06:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29123 states. [2020-07-19 22:06:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29123 states to 29123 states and 47478 transitions. [2020-07-19 22:06:22,939 INFO L78 Accepts]: Start accepts. Automaton has 29123 states and 47478 transitions. Word has length 490 [2020-07-19 22:06:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:06:22,939 INFO L479 AbstractCegarLoop]: Abstraction has 29123 states and 47478 transitions. [2020-07-19 22:06:22,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:06:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29123 states and 47478 transitions. [2020-07-19 22:06:22,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-19 22:06:22,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:06:22,973 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 22:06:22,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-19 22:06:22,974 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:06:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:06:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1697744443, now seen corresponding path program 1 times [2020-07-19 22:06:22,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:06:22,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542062140] [2020-07-19 22:06:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:06:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:24,248 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:06:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:24,741 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 22:06:24,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542062140] [2020-07-19 22:06:24,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:06:24,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:06:24,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634664638] [2020-07-19 22:06:24,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:06:24,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:06:24,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:06:24,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:06:24,744 INFO L87 Difference]: Start difference. First operand 29123 states and 47478 transitions. Second operand 4 states. [2020-07-19 22:06:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:06:48,446 INFO L93 Difference]: Finished difference Result 85361 states and 139207 transitions. [2020-07-19 22:06:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:06:48,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-19 22:06:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:06:48,519 INFO L225 Difference]: With dead ends: 85361 [2020-07-19 22:06:48,520 INFO L226 Difference]: Without dead ends: 57258 [2020-07-19 22:06:48,560 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 22:06:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57258 states. [2020-07-19 22:06:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57258 to 57219. [2020-07-19 22:06:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57219 states. [2020-07-19 22:06:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57219 states to 57219 states and 92958 transitions. [2020-07-19 22:06:50,892 INFO L78 Accepts]: Start accepts. Automaton has 57219 states and 92958 transitions. Word has length 492 [2020-07-19 22:06:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:06:50,893 INFO L479 AbstractCegarLoop]: Abstraction has 57219 states and 92958 transitions. [2020-07-19 22:06:50,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:06:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 57219 states and 92958 transitions. [2020-07-19 22:06:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-19 22:06:50,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:06:50,952 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 22:06:50,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-19 22:06:50,953 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:06:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:06:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash 12438715, now seen corresponding path program 1 times [2020-07-19 22:06:50,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:06:50,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889705647] [2020-07-19 22:06:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:06:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:53,938 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:06:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:06:54,149 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 22:06:54,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889705647] [2020-07-19 22:06:54,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:06:54,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:06:54,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029514611] [2020-07-19 22:06:54,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:06:54,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:06:54,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:06:54,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:06:54,152 INFO L87 Difference]: Start difference. First operand 57219 states and 92958 transitions. Second operand 4 states. [2020-07-19 22:07:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:07:11,397 INFO L93 Difference]: Finished difference Result 104837 states and 168893 transitions. [2020-07-19 22:07:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:07:11,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-19 22:07:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:07:11,485 INFO L225 Difference]: With dead ends: 104837 [2020-07-19 22:07:11,486 INFO L226 Difference]: Without dead ends: 74643 [2020-07-19 22:07:11,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:07:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74643 states. [2020-07-19 22:07:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74643 to 68099. [2020-07-19 22:07:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68099 states. [2020-07-19 22:07:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68099 states to 68099 states and 110830 transitions. [2020-07-19 22:07:14,406 INFO L78 Accepts]: Start accepts. Automaton has 68099 states and 110830 transitions. Word has length 492 [2020-07-19 22:07:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:07:14,406 INFO L479 AbstractCegarLoop]: Abstraction has 68099 states and 110830 transitions. [2020-07-19 22:07:14,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:07:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 68099 states and 110830 transitions. [2020-07-19 22:07:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-19 22:07:14,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:07:14,451 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 22:07:14,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-19 22:07:14,452 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:07:14,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:07:14,452 INFO L82 PathProgramCache]: Analyzing trace with hash 888450607, now seen corresponding path program 1 times [2020-07-19 22:07:14,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:07:14,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334765349] [2020-07-19 22:07:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:07:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:07:15,704 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:07:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:07:16,014 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 22:07:16,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334765349] [2020-07-19 22:07:16,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:07:16,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 22:07:16,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802994829] [2020-07-19 22:07:16,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 22:07:16,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:07:16,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 22:07:16,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-19 22:07:16,017 INFO L87 Difference]: Start difference. First operand 68099 states and 110830 transitions. Second operand 7 states. [2020-07-19 22:07:16,909 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-07-19 22:07:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:07:36,025 INFO L93 Difference]: Finished difference Result 172233 states and 278583 transitions. [2020-07-19 22:07:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 22:07:36,026 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 493 [2020-07-19 22:07:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:07:36,184 INFO L225 Difference]: With dead ends: 172233 [2020-07-19 22:07:36,184 INFO L226 Difference]: Without dead ends: 128615 [2020-07-19 22:07:36,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-19 22:07:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128615 states. [2020-07-19 22:07:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128615 to 128435. [2020-07-19 22:07:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128435 states. [2020-07-19 22:07:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128435 states to 128435 states and 208358 transitions. [2020-07-19 22:07:45,155 INFO L78 Accepts]: Start accepts. Automaton has 128435 states and 208358 transitions. Word has length 493 [2020-07-19 22:07:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:07:45,156 INFO L479 AbstractCegarLoop]: Abstraction has 128435 states and 208358 transitions. [2020-07-19 22:07:45,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 22:07:45,156 INFO L276 IsEmpty]: Start isEmpty. Operand 128435 states and 208358 transitions. [2020-07-19 22:07:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-19 22:07:45,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:07:45,224 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 22:07:45,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-19 22:07:45,224 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:07:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:07:45,224 INFO L82 PathProgramCache]: Analyzing trace with hash -973547532, now seen corresponding path program 1 times [2020-07-19 22:07:45,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:07:45,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376246107] [2020-07-19 22:07:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:07:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:07:47,046 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:07:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:07:47,393 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 22:07:47,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376246107] [2020-07-19 22:07:47,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:07:47,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 22:07:47,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526895891] [2020-07-19 22:07:47,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 22:07:47,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:07:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 22:07:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-19 22:07:47,395 INFO L87 Difference]: Start difference. First operand 128435 states and 208358 transitions. Second operand 9 states. [2020-07-19 22:07:48,334 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-07-19 22:08:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:08:22,532 INFO L93 Difference]: Finished difference Result 347171 states and 561686 transitions. [2020-07-19 22:08:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 22:08:22,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 493 [2020-07-19 22:08:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:08:22,889 INFO L225 Difference]: With dead ends: 347171 [2020-07-19 22:08:22,889 INFO L226 Difference]: Without dead ends: 244369 [2020-07-19 22:08:22,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-07-19 22:08:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244369 states. [2020-07-19 22:08:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244369 to 158939. [2020-07-19 22:08:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158939 states. [2020-07-19 22:08:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158939 states to 158939 states and 253030 transitions. [2020-07-19 22:08:35,444 INFO L78 Accepts]: Start accepts. Automaton has 158939 states and 253030 transitions. Word has length 493 [2020-07-19 22:08:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:08:35,445 INFO L479 AbstractCegarLoop]: Abstraction has 158939 states and 253030 transitions. [2020-07-19 22:08:35,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 22:08:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 158939 states and 253030 transitions. [2020-07-19 22:08:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-19 22:08:35,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:08:35,526 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 22:08:35,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-19 22:08:35,527 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:08:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:08:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash -128473503, now seen corresponding path program 1 times [2020-07-19 22:08:35,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:08:35,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599585555] [2020-07-19 22:08:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:08:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:08:37,505 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:08:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:08:38,073 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 22:08:38,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599585555] [2020-07-19 22:08:38,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:08:38,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:08:38,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083743181] [2020-07-19 22:08:38,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:08:38,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:08:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:08:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:08:38,075 INFO L87 Difference]: Start difference. First operand 158939 states and 253030 transitions. Second operand 5 states. [2020-07-19 22:09:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:09:18,857 INFO L93 Difference]: Finished difference Result 468988 states and 746995 transitions. [2020-07-19 22:09:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:09:18,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-19 22:09:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:09:19,305 INFO L225 Difference]: With dead ends: 468988 [2020-07-19 22:09:19,306 INFO L226 Difference]: Without dead ends: 311485 [2020-07-19 22:09:19,445 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 22:09:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311485 states. [2020-07-19 22:09:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311485 to 311439. [2020-07-19 22:09:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311439 states. [2020-07-19 22:09:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311439 states to 311439 states and 494774 transitions. [2020-07-19 22:09:49,567 INFO L78 Accepts]: Start accepts. Automaton has 311439 states and 494774 transitions. Word has length 493 [2020-07-19 22:09:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:09:49,568 INFO L479 AbstractCegarLoop]: Abstraction has 311439 states and 494774 transitions. [2020-07-19 22:09:49,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:09:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 311439 states and 494774 transitions. [2020-07-19 22:09:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-19 22:09:50,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:09:50,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:09:50,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-19 22:09:50,551 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:09:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:09:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash -983128544, now seen corresponding path program 1 times [2020-07-19 22:09:50,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:09:50,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168839877] [2020-07-19 22:09:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:09:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:09:51,864 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:09:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:09:52,139 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 22:09:52,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168839877] [2020-07-19 22:09:52,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:09:52,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:09:52,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955268832] [2020-07-19 22:09:52,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:09:52,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:09:52,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:09:52,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:09:52,141 INFO L87 Difference]: Start difference. First operand 311439 states and 494774 transitions. Second operand 4 states. [2020-07-19 22:11:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:11:02,547 INFO L93 Difference]: Finished difference Result 919907 states and 1460039 transitions. [2020-07-19 22:11:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:11:02,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-07-19 22:11:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:11:03,521 INFO L225 Difference]: With dead ends: 919907 [2020-07-19 22:11:03,521 INFO L226 Difference]: Without dead ends: 613147 [2020-07-19 22:11:03,818 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 22:11:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613147 states. [2020-07-19 22:11:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613147 to 613110. [2020-07-19 22:11:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613110 states. [2020-07-19 22:12:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613110 states to 613110 states and 970466 transitions. [2020-07-19 22:12:00,194 INFO L78 Accepts]: Start accepts. Automaton has 613110 states and 970466 transitions. Word has length 494 [2020-07-19 22:12:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:12:00,194 INFO L479 AbstractCegarLoop]: Abstraction has 613110 states and 970466 transitions. [2020-07-19 22:12:00,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:12:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 613110 states and 970466 transitions. [2020-07-19 22:12:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-19 22:12:01,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:12:01,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:12:01,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-19 22:12:01,983 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:12:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:12:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 622715965, now seen corresponding path program 1 times [2020-07-19 22:12:01,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:12:01,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536926890] [2020-07-19 22:12:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:12:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:12:03,511 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:12:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:12:03,671 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 22:12:03,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536926890] [2020-07-19 22:12:03,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:12:03,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:12:03,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215849710] [2020-07-19 22:12:03,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:12:03,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:12:03,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:12:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:12:03,674 INFO L87 Difference]: Start difference. First operand 613110 states and 970466 transitions. Second operand 5 states. [2020-07-19 22:13:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:13:30,730 INFO L93 Difference]: Finished difference Result 1319275 states and 2092660 transitions. [2020-07-19 22:13:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:13:30,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-07-19 22:13:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:13:31,724 INFO L225 Difference]: With dead ends: 1319275 [2020-07-19 22:13:31,725 INFO L226 Difference]: Without dead ends: 662515 [2020-07-19 22:13:32,137 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 22:13:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662515 states. [2020-07-19 22:14:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662515 to 662401. [2020-07-19 22:14:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662401 states. [2020-07-19 22:14:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662401 states to 662401 states and 1047605 transitions. [2020-07-19 22:14:38,850 INFO L78 Accepts]: Start accepts. Automaton has 662401 states and 1047605 transitions. Word has length 494 [2020-07-19 22:14:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:14:38,851 INFO L479 AbstractCegarLoop]: Abstraction has 662401 states and 1047605 transitions. [2020-07-19 22:14:38,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:14:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 662401 states and 1047605 transitions. [2020-07-19 22:14:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-19 22:14:39,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:14:39,178 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 22:14:39,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-19 22:14:39,178 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:14:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:14:39,179 INFO L82 PathProgramCache]: Analyzing trace with hash -340986835, now seen corresponding path program 1 times [2020-07-19 22:14:39,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:14:39,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645776297] [2020-07-19 22:14:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217e52b0 [2020-07-19 22:14:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:14:41,720 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 406 [2020-07-19 22:14:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:14:42,146 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 22:14:42,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645776297] [2020-07-19 22:14:42,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:14:42,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:14:42,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519028554] [2020-07-19 22:14:42,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:14:42,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:14:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:14:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:14:42,149 INFO L87 Difference]: Start difference. First operand 662401 states and 1047605 transitions. Second operand 4 states.