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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:12,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:12,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:12,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:12,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:12,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:12,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:12,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:12,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:12,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:12,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:12,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:12,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:12,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:12,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:12,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:12,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:12,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:12,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:12,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:12,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:12,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:12,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:12,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:12,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:58:12,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:58:12,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:58:12,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:58:12,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:58:12,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:58:12,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:58:12,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:58:12,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:58:12,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:12,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:12,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:12,365 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 23:58:12,379 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:12,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:12,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:12,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:12,380 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:12,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:12,381 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:12,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:12,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:12,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:12,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:12,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:12,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:12,382 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:12,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:12,383 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:12,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:12,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:12,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:12,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:12,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:12,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:12,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:12,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:12,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:12,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:12,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:12,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:12,385 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 23:58:12,647 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:12,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:12,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:12,668 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:12,669 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:12,669 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label59.c [2019-10-14 23:58:12,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c17b59068/8be15e4976524763a815dd704511b07b/FLAGa9a776cc6 [2019-10-14 23:58:13,287 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:13,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label59.c [2019-10-14 23:58:13,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c17b59068/8be15e4976524763a815dd704511b07b/FLAGa9a776cc6 [2019-10-14 23:58:13,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c17b59068/8be15e4976524763a815dd704511b07b [2019-10-14 23:58:13,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:13,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:13,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:13,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:13,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:13,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:13" (1/1) ... [2019-10-14 23:58:13,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52da3fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:13, skipping insertion in model container [2019-10-14 23:58:13,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:13" (1/1) ... [2019-10-14 23:58:13,609 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:13,655 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:14,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:14,152 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:14,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:14,266 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:14,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14 WrapperNode [2019-10-14 23:58:14,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:14,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:14,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:14,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:14,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14" (1/1) ... [2019-10-14 23:58:14,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14" (1/1) ... [2019-10-14 23:58:14,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14" (1/1) ... [2019-10-14 23:58:14,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14" (1/1) ... [2019-10-14 23:58:14,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14" (1/1) ... [2019-10-14 23:58:14,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14" (1/1) ... [2019-10-14 23:58:14,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14" (1/1) ... [2019-10-14 23:58:14,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:14,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:14,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:14,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:14,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14" (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 23:58:14,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:58:14,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:58:14,465 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:58:14,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:58:14,465 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:58:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:58:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:58:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:58:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:58:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:58:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:58:15,644 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:58:15,645 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:58:15,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:15 BoogieIcfgContainer [2019-10-14 23:58:15,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:58:15,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:58:15,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:58:15,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:58:15,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:13" (1/3) ... [2019-10-14 23:58:15,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ace750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:15, skipping insertion in model container [2019-10-14 23:58:15,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:14" (2/3) ... [2019-10-14 23:58:15,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ace750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:15, skipping insertion in model container [2019-10-14 23:58:15,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:15" (3/3) ... [2019-10-14 23:58:15,655 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label59.c [2019-10-14 23:58:15,665 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:58:15,673 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:58:15,684 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:58:15,712 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:58:15,712 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:58:15,712 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:58:15,712 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:58:15,713 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:58:15,713 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:58:15,713 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:58:15,713 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:58:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:58:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 23:58:15,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:15,748 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] [2019-10-14 23:58:15,750 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1246520719, now seen corresponding path program 1 times [2019-10-14 23:58:15,765 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:15,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843600883] [2019-10-14 23:58:15,766 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:15,766 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:15,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:16,203 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 23:58:16,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843600883] [2019-10-14 23:58:16,205 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:16,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:16,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974624171] [2019-10-14 23:58:16,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:16,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:16,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:16,232 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:58:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:17,025 INFO L93 Difference]: Finished difference Result 624 states and 1069 transitions. [2019-10-14 23:58:17,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:17,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2019-10-14 23:58:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:17,048 INFO L225 Difference]: With dead ends: 624 [2019-10-14 23:58:17,048 INFO L226 Difference]: Without dead ends: 326 [2019-10-14 23:58:17,060 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 23:58:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-14 23:58:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 321. [2019-10-14 23:58:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:58:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 467 transitions. [2019-10-14 23:58:17,168 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 467 transitions. Word has length 89 [2019-10-14 23:58:17,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:17,169 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 467 transitions. [2019-10-14 23:58:17,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 467 transitions. [2019-10-14 23:58:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-14 23:58:17,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:17,175 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] [2019-10-14 23:58:17,175 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:17,176 INFO L82 PathProgramCache]: Analyzing trace with hash 784816566, now seen corresponding path program 1 times [2019-10-14 23:58:17,176 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:17,176 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681971976] [2019-10-14 23:58:17,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:17,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:17,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:17,348 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 23:58:17,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681971976] [2019-10-14 23:58:17,350 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:17,350 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:17,350 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082212295] [2019-10-14 23:58:17,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:17,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:17,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:17,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:17,353 INFO L87 Difference]: Start difference. First operand 321 states and 467 transitions. Second operand 3 states. [2019-10-14 23:58:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:17,879 INFO L93 Difference]: Finished difference Result 927 states and 1371 transitions. [2019-10-14 23:58:17,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:17,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-10-14 23:58:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:17,892 INFO L225 Difference]: With dead ends: 927 [2019-10-14 23:58:17,892 INFO L226 Difference]: Without dead ends: 612 [2019-10-14 23:58:17,894 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 23:58:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-14 23:58:17,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-14 23:58:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-14 23:58:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 797 transitions. [2019-10-14 23:58:17,945 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 797 transitions. Word has length 97 [2019-10-14 23:58:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:17,947 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 797 transitions. [2019-10-14 23:58:17,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 797 transitions. [2019-10-14 23:58:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:58:17,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:17,954 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] [2019-10-14 23:58:17,954 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1229109032, now seen corresponding path program 1 times [2019-10-14 23:58:17,955 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:17,955 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847138985] [2019-10-14 23:58:17,955 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:17,955 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:17,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:18,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847138985] [2019-10-14 23:58:18,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477381484] [2019-10-14 23:58:18,175 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 23:58:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:18,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:18,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:18,354 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 23:58:18,358 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:18,436 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 23:58:18,436 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:18,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-14 23:58:18,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105379224] [2019-10-14 23:58:18,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:58:18,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:18,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:58:18,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:58:18,439 INFO L87 Difference]: Start difference. First operand 612 states and 797 transitions. Second operand 4 states. [2019-10-14 23:58:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:19,466 INFO L93 Difference]: Finished difference Result 2233 states and 3021 transitions. [2019-10-14 23:58:19,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:58:19,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2019-10-14 23:58:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:19,477 INFO L225 Difference]: With dead ends: 2233 [2019-10-14 23:58:19,478 INFO L226 Difference]: Without dead ends: 1481 [2019-10-14 23:58:19,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:58:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2019-10-14 23:58:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1330. [2019-10-14 23:58:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1330 states. [2019-10-14 23:58:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1728 transitions. [2019-10-14 23:58:19,540 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1728 transitions. Word has length 102 [2019-10-14 23:58:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:19,565 INFO L462 AbstractCegarLoop]: Abstraction has 1330 states and 1728 transitions. [2019-10-14 23:58:19,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:58:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1728 transitions. [2019-10-14 23:58:19,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 23:58:19,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:19,569 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] [2019-10-14 23:58:19,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:19,770 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:19,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:19,771 INFO L82 PathProgramCache]: Analyzing trace with hash -4952584, now seen corresponding path program 1 times [2019-10-14 23:58:19,771 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:19,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536381995] [2019-10-14 23:58:19,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:19,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:19,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:19,887 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 23:58:19,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536381995] [2019-10-14 23:58:19,888 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:19,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:19,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629747488] [2019-10-14 23:58:19,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:19,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:19,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:19,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:19,890 INFO L87 Difference]: Start difference. First operand 1330 states and 1728 transitions. Second operand 6 states. [2019-10-14 23:58:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:20,738 INFO L93 Difference]: Finished difference Result 3292 states and 4438 transitions. [2019-10-14 23:58:20,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:20,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-10-14 23:58:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:20,753 INFO L225 Difference]: With dead ends: 3292 [2019-10-14 23:58:20,753 INFO L226 Difference]: Without dead ends: 1968 [2019-10-14 23:58:20,758 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 23:58:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2019-10-14 23:58:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1795. [2019-10-14 23:58:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1795 states. [2019-10-14 23:58:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2379 transitions. [2019-10-14 23:58:20,868 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2379 transitions. Word has length 110 [2019-10-14 23:58:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:20,869 INFO L462 AbstractCegarLoop]: Abstraction has 1795 states and 2379 transitions. [2019-10-14 23:58:20,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2379 transitions. [2019-10-14 23:58:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 23:58:20,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:20,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:20,880 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1989299795, now seen corresponding path program 1 times [2019-10-14 23:58:20,881 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:20,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280356774] [2019-10-14 23:58:20,881 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:20,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:20,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:21,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280356774] [2019-10-14 23:58:21,135 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:21,135 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:21,135 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990964415] [2019-10-14 23:58:21,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:21,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:21,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:21,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:21,138 INFO L87 Difference]: Start difference. First operand 1795 states and 2379 transitions. Second operand 6 states. [2019-10-14 23:58:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:21,905 INFO L93 Difference]: Finished difference Result 4822 states and 6791 transitions. [2019-10-14 23:58:21,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:21,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-10-14 23:58:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:21,938 INFO L225 Difference]: With dead ends: 4822 [2019-10-14 23:58:21,938 INFO L226 Difference]: Without dead ends: 3033 [2019-10-14 23:58:21,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:58:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2019-10-14 23:58:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2403. [2019-10-14 23:58:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2403 states. [2019-10-14 23:58:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3195 transitions. [2019-10-14 23:58:22,080 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3195 transitions. Word has length 121 [2019-10-14 23:58:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:22,080 INFO L462 AbstractCegarLoop]: Abstraction has 2403 states and 3195 transitions. [2019-10-14 23:58:22,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3195 transitions. [2019-10-14 23:58:22,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-14 23:58:22,092 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:22,092 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, 1, 1, 1, 1, 1] [2019-10-14 23:58:22,093 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash 756035358, now seen corresponding path program 1 times [2019-10-14 23:58:22,093 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:22,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096345870] [2019-10-14 23:58:22,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:22,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:22,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:22,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096345870] [2019-10-14 23:58:22,263 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:22,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:22,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787143518] [2019-10-14 23:58:22,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:22,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:22,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:22,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:22,269 INFO L87 Difference]: Start difference. First operand 2403 states and 3195 transitions. Second operand 6 states. [2019-10-14 23:58:22,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:22,963 INFO L93 Difference]: Finished difference Result 4828 states and 6490 transitions. [2019-10-14 23:58:22,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:22,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2019-10-14 23:58:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:22,978 INFO L225 Difference]: With dead ends: 4828 [2019-10-14 23:58:22,978 INFO L226 Difference]: Without dead ends: 2431 [2019-10-14 23:58:22,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 23:58:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2019-10-14 23:58:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2409. [2019-10-14 23:58:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2409 states. [2019-10-14 23:58:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3068 transitions. [2019-10-14 23:58:23,066 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3068 transitions. Word has length 151 [2019-10-14 23:58:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:23,067 INFO L462 AbstractCegarLoop]: Abstraction has 2409 states and 3068 transitions. [2019-10-14 23:58:23,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3068 transitions. [2019-10-14 23:58:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:58:23,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:23,075 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 23:58:23,075 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:23,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:23,075 INFO L82 PathProgramCache]: Analyzing trace with hash -898624328, now seen corresponding path program 1 times [2019-10-14 23:58:23,076 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:23,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106123501] [2019-10-14 23:58:23,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:23,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:23,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:23,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106123501] [2019-10-14 23:58:23,246 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:23,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:23,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854341304] [2019-10-14 23:58:23,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:23,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:23,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:23,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:23,247 INFO L87 Difference]: Start difference. First operand 2409 states and 3068 transitions. Second operand 6 states. [2019-10-14 23:58:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:24,032 INFO L93 Difference]: Finished difference Result 5320 states and 7099 transitions. [2019-10-14 23:58:24,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:58:24,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-10-14 23:58:24,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:24,048 INFO L225 Difference]: With dead ends: 5320 [2019-10-14 23:58:24,048 INFO L226 Difference]: Without dead ends: 2615 [2019-10-14 23:58:24,056 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 23:58:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2019-10-14 23:58:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2415. [2019-10-14 23:58:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2415 states. [2019-10-14 23:58:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 2951 transitions. [2019-10-14 23:58:24,130 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 2951 transitions. Word has length 160 [2019-10-14 23:58:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:24,130 INFO L462 AbstractCegarLoop]: Abstraction has 2415 states and 2951 transitions. [2019-10-14 23:58:24,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 2951 transitions. [2019-10-14 23:58:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-14 23:58:24,138 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:24,138 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:24,138 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:24,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash 778950037, now seen corresponding path program 1 times [2019-10-14 23:58:24,139 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:24,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720169979] [2019-10-14 23:58:24,139 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:24,139 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:24,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:24,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720169979] [2019-10-14 23:58:24,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078876082] [2019-10-14 23:58:24,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:24,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:58:24,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:24,436 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:24,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1715496691] [2019-10-14 23:58:24,502 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 165 [2019-10-14 23:58:24,551 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:58:24,552 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)