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/Problem02_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:55:46,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:55:46,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:55:46,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:55:46,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:55:46,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:55:46,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:55:46,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:55:46,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:55:46,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:55:46,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:55:46,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:55:46,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:55:46,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:55:46,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:55:46,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:55:46,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:55:46,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:55:46,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:55:46,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:55:46,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:55:46,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:55:46,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:55:46,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:55:46,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:55:46,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:55:46,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:55:46,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:55:46,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:55:46,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:55:46,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:55:46,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:55:46,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:55:46,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:55:46,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:55:46,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:55:46,455 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 [2019-10-14 23:55:46,468 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:55:46,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:55:46,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:55:46,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:55:46,470 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:55:46,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:55:46,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:55:46,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:55:46,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:55:46,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:55:46,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:55:46,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:55:46,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:55:46,472 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:55:46,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:55:46,472 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:55:46,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:55:46,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:55:46,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:55:46,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:55:46,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:55:46,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:46,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:55:46,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:55:46,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:55:46,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:55:46,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:55:46,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:55:46,479 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 [2019-10-14 23:55:46,737 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:55:46,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:55:46,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:55:46,759 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:55:46,760 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:55:46,761 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2019-10-14 23:55:46,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1048ecf8f/ee27756dd7464a63a70ff0d4c3b08985/FLAGea16243b0 [2019-10-14 23:55:47,409 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:55:47,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2019-10-14 23:55:47,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1048ecf8f/ee27756dd7464a63a70ff0d4c3b08985/FLAGea16243b0 [2019-10-14 23:55:47,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1048ecf8f/ee27756dd7464a63a70ff0d4c3b08985 [2019-10-14 23:55:47,731 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:55:47,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:55:47,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:47,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:55:47,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:55:47,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:47" (1/1) ... [2019-10-14 23:55:47,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f877d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:47, skipping insertion in model container [2019-10-14 23:55:47,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:47" (1/1) ... [2019-10-14 23:55:47,748 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:55:47,810 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:55:48,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:48,448 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:55:48,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:48,575 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:55:48,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48 WrapperNode [2019-10-14 23:55:48,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:48,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:55:48,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:55:48,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:55:48,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48" (1/1) ... [2019-10-14 23:55:48,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48" (1/1) ... [2019-10-14 23:55:48,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48" (1/1) ... [2019-10-14 23:55:48,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48" (1/1) ... [2019-10-14 23:55:48,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48" (1/1) ... [2019-10-14 23:55:48,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48" (1/1) ... [2019-10-14 23:55:48,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48" (1/1) ... [2019-10-14 23:55:48,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:55:48,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:55:48,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:55:48,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:55:48,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48" (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 [2019-10-14 23:55:48,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:55:48,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:55:48,763 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:55:48,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:55:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:55:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:55:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:55:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:55:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:55:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:55:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:49,913 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:49,914 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:49,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:49 BoogieIcfgContainer [2019-10-14 23:55:49,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:49,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:49,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:49,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:49,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:47" (1/3) ... [2019-10-14 23:55:49,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106694d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:49, skipping insertion in model container [2019-10-14 23:55:49,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:48" (2/3) ... [2019-10-14 23:55:49,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106694d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:49, skipping insertion in model container [2019-10-14 23:55:49,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:49" (3/3) ... [2019-10-14 23:55:49,924 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label09.c [2019-10-14 23:55:49,935 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:49,945 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:49,958 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:49,989 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:49,990 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:49,990 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:49,990 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:49,991 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:49,991 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:49,991 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:49,991 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:55:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-14 23:55:50,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:50,034 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] [2019-10-14 23:55:50,036 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash -976875031, now seen corresponding path program 1 times [2019-10-14 23:55:50,054 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:50,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266606241] [2019-10-14 23:55:50,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:50,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:50,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:50,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266606241] [2019-10-14 23:55:50,627 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:50,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:50,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678958280] [2019-10-14 23:55:50,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:50,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:50,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:50,655 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:55:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:51,646 INFO L93 Difference]: Finished difference Result 624 states and 1069 transitions. [2019-10-14 23:55:51,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:51,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2019-10-14 23:55:51,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:51,679 INFO L225 Difference]: With dead ends: 624 [2019-10-14 23:55:51,679 INFO L226 Difference]: Without dead ends: 326 [2019-10-14 23:55:51,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-14 23:55:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 321. [2019-10-14 23:55:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:55:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 467 transitions. [2019-10-14 23:55:51,794 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 467 transitions. Word has length 127 [2019-10-14 23:55:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:51,796 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 467 transitions. [2019-10-14 23:55:51,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 467 transitions. [2019-10-14 23:55:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-14 23:55:51,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:51,812 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] [2019-10-14 23:55:51,813 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1101712018, now seen corresponding path program 1 times [2019-10-14 23:55:51,816 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:51,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393461635] [2019-10-14 23:55:51,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:51,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:51,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:52,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393461635] [2019-10-14 23:55:52,179 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:52,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:52,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620216550] [2019-10-14 23:55:52,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:52,183 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:52,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:52,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:52,184 INFO L87 Difference]: Start difference. First operand 321 states and 467 transitions. Second operand 5 states. [2019-10-14 23:55:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:52,867 INFO L93 Difference]: Finished difference Result 723 states and 1093 transitions. [2019-10-14 23:55:52,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:52,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2019-10-14 23:55:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:52,872 INFO L225 Difference]: With dead ends: 723 [2019-10-14 23:55:52,872 INFO L226 Difference]: Without dead ends: 321 [2019-10-14 23:55:52,874 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-10-14 23:55:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2019-10-14 23:55:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:55:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 463 transitions. [2019-10-14 23:55:52,889 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 463 transitions. Word has length 135 [2019-10-14 23:55:52,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:52,890 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 463 transitions. [2019-10-14 23:55:52,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 463 transitions. [2019-10-14 23:55:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-14 23:55:52,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:52,893 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:55:52,893 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1390328654, now seen corresponding path program 1 times [2019-10-14 23:55:52,894 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:52,894 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722344988] [2019-10-14 23:55:52,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:52,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:52,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:52,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722344988] [2019-10-14 23:55:52,998 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:52,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:52,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546503342] [2019-10-14 23:55:53,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:53,000 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:53,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:53,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:53,001 INFO L87 Difference]: Start difference. First operand 321 states and 463 transitions. Second operand 6 states. [2019-10-14 23:55:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:54,055 INFO L93 Difference]: Finished difference Result 979 states and 1481 transitions. [2019-10-14 23:55:54,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:55:54,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-10-14 23:55:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:54,063 INFO L225 Difference]: With dead ends: 979 [2019-10-14 23:55:54,063 INFO L226 Difference]: Without dead ends: 664 [2019-10-14 23:55:54,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:55:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-10-14 23:55:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 632. [2019-10-14 23:55:54,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2019-10-14 23:55:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 895 transitions. [2019-10-14 23:55:54,101 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 895 transitions. Word has length 137 [2019-10-14 23:55:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:54,101 INFO L462 AbstractCegarLoop]: Abstraction has 632 states and 895 transitions. [2019-10-14 23:55:54,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 895 transitions. [2019-10-14 23:55:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-14 23:55:54,105 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:54,105 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:55:54,105 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash 13692256, now seen corresponding path program 1 times [2019-10-14 23:55:54,106 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:54,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795742330] [2019-10-14 23:55:54,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:54,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:54,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:54,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795742330] [2019-10-14 23:55:54,343 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:54,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:55:54,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57291939] [2019-10-14 23:55:54,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:55:54,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:54,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:55:54,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:55:54,344 INFO L87 Difference]: Start difference. First operand 632 states and 895 transitions. Second operand 7 states. [2019-10-14 23:55:55,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:55,892 INFO L93 Difference]: Finished difference Result 2079 states and 3063 transitions. [2019-10-14 23:55:55,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:55:55,892 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2019-10-14 23:55:55,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:55,901 INFO L225 Difference]: With dead ends: 2079 [2019-10-14 23:55:55,901 INFO L226 Difference]: Without dead ends: 1453 [2019-10-14 23:55:55,903 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:55:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2019-10-14 23:55:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1365. [2019-10-14 23:55:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2019-10-14 23:55:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1940 transitions. [2019-10-14 23:55:55,953 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1940 transitions. Word has length 140 [2019-10-14 23:55:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:55,953 INFO L462 AbstractCegarLoop]: Abstraction has 1365 states and 1940 transitions. [2019-10-14 23:55:55,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:55:55,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1940 transitions. [2019-10-14 23:55:55,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 23:55:55,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:55,959 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] [2019-10-14 23:55:55,960 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:55,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1527973936, now seen corresponding path program 1 times [2019-10-14 23:55:55,960 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:55,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304898449] [2019-10-14 23:55:55,961 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:55,961 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:55,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:56,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304898449] [2019-10-14 23:55:56,083 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:56,084 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:56,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610893103] [2019-10-14 23:55:56,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:56,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:56,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:56,086 INFO L87 Difference]: Start difference. First operand 1365 states and 1940 transitions. Second operand 6 states. [2019-10-14 23:55:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:56,949 INFO L93 Difference]: Finished difference Result 3355 states and 4901 transitions. [2019-10-14 23:55:56,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:55:56,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2019-10-14 23:55:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:56,968 INFO L225 Difference]: With dead ends: 3355 [2019-10-14 23:55:56,968 INFO L226 Difference]: Without dead ends: 1996 [2019-10-14 23:55:56,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:55:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2019-10-14 23:55:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1968. [2019-10-14 23:55:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1968 states. [2019-10-14 23:55:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2752 transitions. [2019-10-14 23:55:57,104 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2752 transitions. Word has length 148 [2019-10-14 23:55:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:57,104 INFO L462 AbstractCegarLoop]: Abstraction has 1968 states and 2752 transitions. [2019-10-14 23:55:57,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:57,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2752 transitions. [2019-10-14 23:55:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 23:55:57,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:57,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:57,113 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash -234431911, now seen corresponding path program 1 times [2019-10-14 23:55:57,113 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:57,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274119085] [2019-10-14 23:55:57,114 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:57,114 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:57,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:57,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274119085] [2019-10-14 23:55:57,409 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:57,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:57,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481616817] [2019-10-14 23:55:57,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:57,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:57,411 INFO L87 Difference]: Start difference. First operand 1968 states and 2752 transitions. Second operand 5 states. [2019-10-14 23:55:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:58,022 INFO L93 Difference]: Finished difference Result 4016 states and 5676 transitions. [2019-10-14 23:55:58,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:58,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-10-14 23:55:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:58,034 INFO L225 Difference]: With dead ends: 4016 [2019-10-14 23:55:58,034 INFO L226 Difference]: Without dead ends: 1968 [2019-10-14 23:55:58,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2019-10-14 23:55:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1968. [2019-10-14 23:55:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1968 states. [2019-10-14 23:55:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2702 transitions. [2019-10-14 23:55:58,097 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2702 transitions. Word has length 153 [2019-10-14 23:55:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:58,097 INFO L462 AbstractCegarLoop]: Abstraction has 1968 states and 2702 transitions. [2019-10-14 23:55:58,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2702 transitions. [2019-10-14 23:55:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-14 23:55:58,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:58,104 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:55:58,105 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1639097634, now seen corresponding path program 1 times [2019-10-14 23:55:58,105 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:58,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912773611] [2019-10-14 23:55:58,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:58,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:58,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:55:58,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912773611] [2019-10-14 23:55:58,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509821526] [2019-10-14 23:55:58,222 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 [2019-10-14 23:55:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:58,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:58,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:58,473 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:58,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1760182868] [2019-10-14 23:55:58,591 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 162 [2019-10-14 23:55:58,659 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:58,659 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)