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/Problem11_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:04:58,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:04:58,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:04:58,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:04:58,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:04:58,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:04:58,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:04:58,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:04:58,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:04:58,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:04:58,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:04:58,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:04:58,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:04:58,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:04:58,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:04:58,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:04:58,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:04:58,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:04:58,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:04:58,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:04:58,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:04:58,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:04:58,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:04:58,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:04:58,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:04:58,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:04:58,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:04:58,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:04:58,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:04:58,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:04:58,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:04:58,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:04:58,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:04:58,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:04:58,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:04:58,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:04:58,515 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 [2019-10-13 20:04:58,530 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:04:58,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:04:58,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:04:58,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:04:58,532 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:04:58,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:04:58,532 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:04:58,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:04:58,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:04:58,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:04:58,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:04:58,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:04:58,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:04:58,534 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:04:58,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:04:58,534 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:04:58,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:04:58,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:04:58,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:04:58,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:04:58,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:04:58,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:04:58,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:04:58,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:04:58,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:04:58,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:04:58,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:04:58,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:04:58,537 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 [2019-10-13 20:04:58,843 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:04:58,856 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:04:58,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:04:58,861 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:04:58,862 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:04:58,863 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label38.c [2019-10-13 20:04:58,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25c22cd76/2aa427e059584cd2a52e89f9a27d34ff/FLAGa6d03ee6d [2019-10-13 20:04:59,525 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:04:59,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label38.c [2019-10-13 20:04:59,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25c22cd76/2aa427e059584cd2a52e89f9a27d34ff/FLAGa6d03ee6d [2019-10-13 20:04:59,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25c22cd76/2aa427e059584cd2a52e89f9a27d34ff [2019-10-13 20:04:59,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:04:59,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:04:59,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:59,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:04:59,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:04:59,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:59" (1/1) ... [2019-10-13 20:04:59,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283ca1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:59, skipping insertion in model container [2019-10-13 20:04:59,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:59" (1/1) ... [2019-10-13 20:04:59,813 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:04:59,874 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:00,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:00,518 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:00,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:00,754 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:00,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00 WrapperNode [2019-10-13 20:05:00,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:00,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:00,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:00,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:00,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00" (1/1) ... [2019-10-13 20:05:00,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00" (1/1) ... [2019-10-13 20:05:00,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00" (1/1) ... [2019-10-13 20:05:00,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00" (1/1) ... [2019-10-13 20:05:00,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00" (1/1) ... [2019-10-13 20:05:00,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00" (1/1) ... [2019-10-13 20:05:00,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00" (1/1) ... [2019-10-13 20:05:00,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:00,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:00,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:00,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:00,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00" (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 [2019-10-13 20:05:01,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:01,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:01,046 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:01,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:01,047 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:01,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:01,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:01,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:02,964 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:02,967 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:02,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:02 BoogieIcfgContainer [2019-10-13 20:05:02,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:02,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:02,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:02,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:02,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:59" (1/3) ... [2019-10-13 20:05:02,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f28d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:02, skipping insertion in model container [2019-10-13 20:05:02,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:00" (2/3) ... [2019-10-13 20:05:02,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f28d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:02, skipping insertion in model container [2019-10-13 20:05:02,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:02" (3/3) ... [2019-10-13 20:05:02,988 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label38.c [2019-10-13 20:05:02,999 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:03,010 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:03,022 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:03,062 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:03,063 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:03,064 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:03,065 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:03,065 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:03,065 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:03,065 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:03,065 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:05:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 20:05:03,118 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:03,119 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] [2019-10-13 20:05:03,123 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1782601651, now seen corresponding path program 1 times [2019-10-13 20:05:03,140 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:03,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403622839] [2019-10-13 20:05:03,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:03,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:03,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:03,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403622839] [2019-10-13 20:05:03,585 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:03,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:05:03,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669011497] [2019-10-13 20:05:03,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:03,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:03,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:03,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:03,612 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-13 20:05:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:05,198 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-10-13 20:05:05,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:05,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2019-10-13 20:05:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:05,219 INFO L225 Difference]: With dead ends: 779 [2019-10-13 20:05:05,219 INFO L226 Difference]: Without dead ends: 425 [2019-10-13 20:05:05,228 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 [2019-10-13 20:05:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-13 20:05:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-13 20:05:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-13 20:05:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-10-13 20:05:05,331 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 66 [2019-10-13 20:05:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:05,332 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-10-13 20:05:05,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-10-13 20:05:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 20:05:05,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:05,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:05,339 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash -271473866, now seen corresponding path program 1 times [2019-10-13 20:05:05,340 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:05,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347837820] [2019-10-13 20:05:05,341 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:05,341 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:05,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:05,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347837820] [2019-10-13 20:05:05,563 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:05,563 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:05,563 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967441355] [2019-10-13 20:05:05,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:05,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:05,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:05,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:05,566 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-10-13 20:05:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:08,322 INFO L93 Difference]: Finished difference Result 1665 states and 2806 transitions. [2019-10-13 20:05:08,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 20:05:08,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-10-13 20:05:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:08,340 INFO L225 Difference]: With dead ends: 1665 [2019-10-13 20:05:08,340 INFO L226 Difference]: Without dead ends: 1251 [2019-10-13 20:05:08,343 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:05:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-13 20:05:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-10-13 20:05:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-10-13 20:05:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1739 transitions. [2019-10-13 20:05:08,463 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1739 transitions. Word has length 136 [2019-10-13 20:05:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:08,463 INFO L462 AbstractCegarLoop]: Abstraction has 1217 states and 1739 transitions. [2019-10-13 20:05:08,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1739 transitions. [2019-10-13 20:05:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 20:05:08,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:08,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:08,469 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:08,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1985877122, now seen corresponding path program 1 times [2019-10-13 20:05:08,470 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:08,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556114381] [2019-10-13 20:05:08,470 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:08,470 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:08,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:08,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556114381] [2019-10-13 20:05:08,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:08,694 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:08,694 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088075549] [2019-10-13 20:05:08,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:08,695 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:08,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:08,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:08,696 INFO L87 Difference]: Start difference. First operand 1217 states and 1739 transitions. Second operand 6 states. [2019-10-13 20:05:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:10,691 INFO L93 Difference]: Finished difference Result 3448 states and 5147 transitions. [2019-10-13 20:05:10,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:10,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2019-10-13 20:05:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:10,710 INFO L225 Difference]: With dead ends: 3448 [2019-10-13 20:05:10,710 INFO L226 Difference]: Without dead ends: 2237 [2019-10-13 20:05:10,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:05:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2019-10-13 20:05:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2212. [2019-10-13 20:05:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-10-13 20:05:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3011 transitions. [2019-10-13 20:05:10,801 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3011 transitions. Word has length 146 [2019-10-13 20:05:10,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:10,802 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 3011 transitions. [2019-10-13 20:05:10,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3011 transitions. [2019-10-13 20:05:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-13 20:05:10,809 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:10,809 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:10,810 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:10,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1482166744, now seen corresponding path program 1 times [2019-10-13 20:05:10,811 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:10,811 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531934846] [2019-10-13 20:05:10,811 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:10,811 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:10,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:11,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531934846] [2019-10-13 20:05:11,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105331983] [2019-10-13 20:05:11,008 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 [2019-10-13 20:05:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:11,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:05:11,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:11,234 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:11,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1644627547] [2019-10-13 20:05:11,408 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 210 [2019-10-13 20:05:11,466 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:05:11,466 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:05:38,149 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:05:38,151 INFO L272 AbstractInterpreter]: Visited 78 different actions 78 times. Never merged. Never widened. Performed 205 root evaluator evaluations with a maximum evaluation depth of 16. Performed 205 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-10-13 20:05:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:38,156 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates