java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:00:19,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:00:19,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:00:19,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:00:19,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:00:19,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:00:19,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:00:19,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:00:19,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:00:19,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:00:19,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:00:19,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:00:19,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:00:19,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:00:19,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:00:19,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:00:19,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:00:19,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:00:19,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:00:19,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:00:19,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:00:19,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:00:19,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:00:19,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:00:19,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:00:19,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:00:19,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:00:19,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:00:19,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:00:19,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:00:19,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:00:19,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:00:19,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:00:19,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:00:19,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:00:19,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:00:19,560 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 [2019-10-15 00:00:19,577 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:00:19,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:00:19,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:00:19,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:00:19,579 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:00:19,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:00:19,579 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:00:19,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:00:19,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:00:19,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:00:19,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:00:19,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:00:19,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:00:19,581 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:00:19,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:00:19,581 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:00:19,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:00:19,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:00:19,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:00:19,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:00:19,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:00:19,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:00:19,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:00:19,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:00:19,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:00:19,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:00:19,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:00:19,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:00:19,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:00:19,855 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:00:19,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:00:19,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:00:19,871 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:00:19,871 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:00:19,872 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label53.c [2019-10-15 00:00:19,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29d2583ba/e0a8b4a4c9ea4f6a841ee4e996af5ede/FLAG6c4b0f175 [2019-10-15 00:00:20,717 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:00:20,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label53.c [2019-10-15 00:00:20,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29d2583ba/e0a8b4a4c9ea4f6a841ee4e996af5ede/FLAG6c4b0f175 [2019-10-15 00:00:20,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29d2583ba/e0a8b4a4c9ea4f6a841ee4e996af5ede [2019-10-15 00:00:20,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:00:20,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:00:20,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:20,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:00:20,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:00:20,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:20" (1/1) ... [2019-10-15 00:00:20,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a108aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:20, skipping insertion in model container [2019-10-15 00:00:20,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:20" (1/1) ... [2019-10-15 00:00:20,812 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:00:20,996 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:00:22,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:22,567 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:00:23,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:23,419 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:00:23,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23 WrapperNode [2019-10-15 00:00:23,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:23,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:00:23,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:00:23,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:00:23,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ... [2019-10-15 00:00:23,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ... [2019-10-15 00:00:23,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ... [2019-10-15 00:00:23,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ... [2019-10-15 00:00:23,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ... [2019-10-15 00:00:23,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ... [2019-10-15 00:00:23,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ... [2019-10-15 00:00:23,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:00:23,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:00:23,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:00:23,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:00:23,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (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 [2019-10-15 00:00:23,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:00:23,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:00:23,791 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:00:23,791 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:00:23,792 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:00:23,793 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 00:00:23,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:00:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:00:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:00:23,797 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:00:23,797 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 00:00:23,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:00:23,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:00:23,801 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:00:23,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:00:23,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:00:23,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:00:28,075 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:00:28,075 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:00:28,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:28 BoogieIcfgContainer [2019-10-15 00:00:28,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:00:28,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:00:28,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:00:28,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:00:28,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:20" (1/3) ... [2019-10-15 00:00:28,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0a93b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:28, skipping insertion in model container [2019-10-15 00:00:28,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (2/3) ... [2019-10-15 00:00:28,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0a93b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:28, skipping insertion in model container [2019-10-15 00:00:28,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:28" (3/3) ... [2019-10-15 00:00:28,087 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label53.c [2019-10-15 00:00:28,098 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:00:28,109 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:00:28,120 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:00:28,159 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:00:28,160 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:00:28,160 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:00:28,160 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:00:28,160 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:00:28,160 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:00:28,160 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:00:28,160 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:00:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states. [2019-10-15 00:00:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2019-10-15 00:00:28,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:28,269 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:00:28,271 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:28,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1648053222, now seen corresponding path program 1 times [2019-10-15 00:00:28,287 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:28,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933617861] [2019-10-15 00:00:28,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:28,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:28,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:30,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933617861] [2019-10-15 00:00:30,234 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:30,234 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:00:30,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697099032] [2019-10-15 00:00:30,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:00:30,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:30,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:00:30,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:00:30,259 INFO L87 Difference]: Start difference. First operand 906 states. Second operand 3 states. [2019-10-15 00:00:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:34,486 INFO L93 Difference]: Finished difference Result 2644 states and 5099 transitions. [2019-10-15 00:00:34,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:00:34,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 807 [2019-10-15 00:00:34,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:34,537 INFO L225 Difference]: With dead ends: 2644 [2019-10-15 00:00:34,538 INFO L226 Difference]: Without dead ends: 1676 [2019-10-15 00:00:34,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:00:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2019-10-15 00:00:34,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676. [2019-10-15 00:00:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2019-10-15 00:00:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 3124 transitions. [2019-10-15 00:00:34,771 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 3124 transitions. Word has length 807 [2019-10-15 00:00:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:34,775 INFO L462 AbstractCegarLoop]: Abstraction has 1676 states and 3124 transitions. [2019-10-15 00:00:34,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:00:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 3124 transitions. [2019-10-15 00:00:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2019-10-15 00:00:34,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:34,889 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:00:34,889 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:34,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:34,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1306167573, now seen corresponding path program 1 times [2019-10-15 00:00:34,892 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:34,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434421437] [2019-10-15 00:00:34,893 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:34,893 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:34,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:36,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434421437] [2019-10-15 00:00:36,635 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:36,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:00:36,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581741467] [2019-10-15 00:00:36,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:00:36,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:00:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:00:36,639 INFO L87 Difference]: Start difference. First operand 1676 states and 3124 transitions. Second operand 3 states. [2019-10-15 00:00:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:40,706 INFO L93 Difference]: Finished difference Result 5014 states and 9407 transitions. [2019-10-15 00:00:40,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:00:40,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 815 [2019-10-15 00:00:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:40,735 INFO L225 Difference]: With dead ends: 5014 [2019-10-15 00:00:40,735 INFO L226 Difference]: Without dead ends: 3344 [2019-10-15 00:00:40,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:00:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2019-10-15 00:00:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 3344. [2019-10-15 00:00:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3344 states. [2019-10-15 00:00:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 5750 transitions. [2019-10-15 00:00:40,851 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 5750 transitions. Word has length 815 [2019-10-15 00:00:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:40,853 INFO L462 AbstractCegarLoop]: Abstraction has 3344 states and 5750 transitions. [2019-10-15 00:00:40,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:00:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 5750 transitions. [2019-10-15 00:00:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2019-10-15 00:00:40,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:40,870 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:00:40,871 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:40,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1609499927, now seen corresponding path program 1 times [2019-10-15 00:00:40,873 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:40,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402578457] [2019-10-15 00:00:40,873 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:40,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:40,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:43,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402578457] [2019-10-15 00:00:43,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546753858] [2019-10-15 00:00:43,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:00:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:43,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 00:00:43,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:00:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:44,425 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:00:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:45,057 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:00:45,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 00:00:45,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391990689] [2019-10-15 00:00:45,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:00:45,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:45,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:00:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:00:45,062 INFO L87 Difference]: Start difference. First operand 3344 states and 5750 transitions. Second operand 4 states. [2019-10-15 00:00:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:52,189 INFO L93 Difference]: Finished difference Result 13354 states and 23414 transitions. [2019-10-15 00:00:52,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:00:52,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 826 [2019-10-15 00:00:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:52,246 INFO L225 Difference]: With dead ends: 13354 [2019-10-15 00:00:52,246 INFO L226 Difference]: Without dead ends: 10016 [2019-10-15 00:00:52,256 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1663 GetRequests, 1656 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:00:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2019-10-15 00:00:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 10016. [2019-10-15 00:00:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10016 states. [2019-10-15 00:00:52,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10016 states to 10016 states and 15388 transitions. [2019-10-15 00:00:52,569 INFO L78 Accepts]: Start accepts. Automaton has 10016 states and 15388 transitions. Word has length 826 [2019-10-15 00:00:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:52,572 INFO L462 AbstractCegarLoop]: Abstraction has 10016 states and 15388 transitions. [2019-10-15 00:00:52,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:00:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 10016 states and 15388 transitions. [2019-10-15 00:00:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2019-10-15 00:00:52,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:52,629 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:00:52,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:00:52,836 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:52,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1890085499, now seen corresponding path program 1 times [2019-10-15 00:00:52,837 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:52,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178070044] [2019-10-15 00:00:52,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:52,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:52,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat