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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:18,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:18,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:18,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:18,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:18,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:18,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:18,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:18,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:18,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:18,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:18,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:18,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:18,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:18,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:18,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:18,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:18,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:18,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:18,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:18,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:18,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:18,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:18,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:18,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:56:18,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:56:18,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:56:18,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:56:18,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:56:18,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:56:18,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:56:18,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:56:18,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:56:18,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:18,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:18,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:18,365 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 23:56:18,379 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:18,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:18,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:18,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:18,381 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:18,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:18,381 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:18,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:18,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:18,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:18,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:18,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:18,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:18,383 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:18,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:18,383 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:18,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:18,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:18,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:18,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:18,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:18,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:18,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:18,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:18,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:18,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:18,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:18,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:18,386 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 23:56:18,644 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:18,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:18,665 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:18,666 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:18,666 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:18,667 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label20.c [2019-10-14 23:56:18,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2696ec5c7/cd2cfb58c0014ee78e27cb406b5b261e/FLAG9ddeedcc6 [2019-10-14 23:56:19,213 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:19,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label20.c [2019-10-14 23:56:19,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2696ec5c7/cd2cfb58c0014ee78e27cb406b5b261e/FLAG9ddeedcc6 [2019-10-14 23:56:19,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2696ec5c7/cd2cfb58c0014ee78e27cb406b5b261e [2019-10-14 23:56:19,502 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:19,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:19,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:19,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:19,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:19,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:19" (1/1) ... [2019-10-14 23:56:19,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a197eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:19, skipping insertion in model container [2019-10-14 23:56:19,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:19" (1/1) ... [2019-10-14 23:56:19,522 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:19,572 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:19,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:19,944 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:20,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:20,159 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:20,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20 WrapperNode [2019-10-14 23:56:20,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:20,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:20,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:20,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:20,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20" (1/1) ... [2019-10-14 23:56:20,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20" (1/1) ... [2019-10-14 23:56:20,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20" (1/1) ... [2019-10-14 23:56:20,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20" (1/1) ... [2019-10-14 23:56:20,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20" (1/1) ... [2019-10-14 23:56:20,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20" (1/1) ... [2019-10-14 23:56:20,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20" (1/1) ... [2019-10-14 23:56:20,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:20,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:20,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:20,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:20,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20" (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 23:56:20,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:20,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:20,327 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:20,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:21,382 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:21,383 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:21,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:21 BoogieIcfgContainer [2019-10-14 23:56:21,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:21,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:21,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:21,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:21,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:19" (1/3) ... [2019-10-14 23:56:21,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f3786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:21, skipping insertion in model container [2019-10-14 23:56:21,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:20" (2/3) ... [2019-10-14 23:56:21,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f3786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:21, skipping insertion in model container [2019-10-14 23:56:21,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:21" (3/3) ... [2019-10-14 23:56:21,393 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label20.c [2019-10-14 23:56:21,402 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:21,411 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:21,422 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:21,449 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:21,450 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:21,450 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:21,450 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:21,451 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:21,451 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:21,451 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:21,452 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-14 23:56:21,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:21,500 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] [2019-10-14 23:56:21,502 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:21,510 INFO L82 PathProgramCache]: Analyzing trace with hash 927745969, now seen corresponding path program 1 times [2019-10-14 23:56:21,518 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:21,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113733971] [2019-10-14 23:56:21,518 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:21,518 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:21,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:21,968 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 23:56:21,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113733971] [2019-10-14 23:56:21,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:21,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:21,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452631136] [2019-10-14 23:56:21,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:21,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:21,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:21,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:21,998 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:22,916 INFO L93 Difference]: Finished difference Result 615 states and 1053 transitions. [2019-10-14 23:56:22,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:22,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-10-14 23:56:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:22,949 INFO L225 Difference]: With dead ends: 615 [2019-10-14 23:56:22,949 INFO L226 Difference]: Without dead ends: 317 [2019-10-14 23:56:22,960 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 23:56:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-10-14 23:56:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2019-10-14 23:56:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-14 23:56:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2019-10-14 23:56:23,068 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 105 [2019-10-14 23:56:23,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:23,070 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2019-10-14 23:56:23,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2019-10-14 23:56:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:56:23,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:23,084 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:56:23,085 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:23,086 INFO L82 PathProgramCache]: Analyzing trace with hash -643989844, now seen corresponding path program 1 times [2019-10-14 23:56:23,086 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:23,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677812331] [2019-10-14 23:56:23,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:23,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:23,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:23,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677812331] [2019-10-14 23:56:23,262 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:23,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:23,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770027336] [2019-10-14 23:56:23,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:23,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:23,265 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand 6 states. [2019-10-14 23:56:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:24,213 INFO L93 Difference]: Finished difference Result 962 states and 1500 transitions. [2019-10-14 23:56:24,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:56:24,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-10-14 23:56:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:24,221 INFO L225 Difference]: With dead ends: 962 [2019-10-14 23:56:24,221 INFO L226 Difference]: Without dead ends: 651 [2019-10-14 23:56:24,223 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 23:56:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-14 23:56:24,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 625. [2019-10-14 23:56:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-10-14 23:56:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 924 transitions. [2019-10-14 23:56:24,277 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 924 transitions. Word has length 120 [2019-10-14 23:56:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:24,278 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 924 transitions. [2019-10-14 23:56:24,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 924 transitions. [2019-10-14 23:56:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 23:56:24,281 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:24,281 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 23:56:24,282 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1294788921, now seen corresponding path program 1 times [2019-10-14 23:56:24,283 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:24,283 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948701861] [2019-10-14 23:56:24,283 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:24,283 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:24,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:56:24,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948701861] [2019-10-14 23:56:24,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605617140] [2019-10-14 23:56:24,419 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 23:56:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:24,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:24,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:24,648 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:24,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [812654566] [2019-10-14 23:56:24,776 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 129 [2019-10-14 23:56:24,839 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:24,840 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)