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_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:04:23,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:04:23,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:04:23,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:04:23,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:04:23,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:04:23,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:04:23,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:04:23,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:04:23,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:04:23,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:04:23,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:04:23,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:04:23,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:04:23,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:04:23,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:04:23,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:04:23,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:04:23,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:04:23,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:04:23,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:04:23,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:04:23,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:04:23,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:04:23,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:04:23,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:04:23,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:04:23,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:04:23,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:04:23,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:04:23,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:04:23,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:04:23,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:04:23,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:04:23,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:04:23,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:04:23,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:04:23,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:04:23,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:04:23,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:04:23,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:04:23,285 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 20:04:23,303 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:04:23,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:04:23,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:04:23,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:04:23,305 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:04:23,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:04:23,305 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:04:23,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:04:23,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:04:23,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:04:23,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:04:23,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:04:23,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:04:23,307 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:04:23,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:04:23,307 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:04:23,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:04:23,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:04:23,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:04:23,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:04:23,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:04:23,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:04:23,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:04:23,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:04:23,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:04:23,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:04:23,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:04:23,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:04:23,310 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 20:04:23,612 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:04:23,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:04:23,634 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:04:23,636 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:04:23,636 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:04:23,637 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-10-13 20:04:23,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd37e218/f6651f5b7bcc47db8d4ff7fde4d967f4/FLAGb2bcd88fc [2019-10-13 20:04:24,371 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:04:24,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-10-13 20:04:24,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd37e218/f6651f5b7bcc47db8d4ff7fde4d967f4/FLAGb2bcd88fc [2019-10-13 20:04:24,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd37e218/f6651f5b7bcc47db8d4ff7fde4d967f4 [2019-10-13 20:04:24,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:04:24,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:04:24,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:24,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:04:24,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:04:24,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:24" (1/1) ... [2019-10-13 20:04:24,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2e6592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:24, skipping insertion in model container [2019-10-13 20:04:24,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:24" (1/1) ... [2019-10-13 20:04:24,640 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:04:24,711 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:04:25,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:25,358 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:04:25,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:25,584 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:04:25,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25 WrapperNode [2019-10-13 20:04:25,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:25,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:04:25,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:04:25,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:04:25,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2019-10-13 20:04:25,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2019-10-13 20:04:25,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2019-10-13 20:04:25,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2019-10-13 20:04:25,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2019-10-13 20:04:25,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2019-10-13 20:04:25,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2019-10-13 20:04:25,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:04:25,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:04:25,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:04:25,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:04:25,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (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 20:04:25,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:04:25,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:04:25,847 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:04:25,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:04:25,848 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:04:25,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:04:25,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:04:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:04:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:04:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:04:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:04:27,597 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:04:27,597 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:04:27,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:27 BoogieIcfgContainer [2019-10-13 20:04:27,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:04:27,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:04:27,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:04:27,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:04:27,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:24" (1/3) ... [2019-10-13 20:04:27,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69af21d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:27, skipping insertion in model container [2019-10-13 20:04:27,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (2/3) ... [2019-10-13 20:04:27,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69af21d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:27, skipping insertion in model container [2019-10-13 20:04:27,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:27" (3/3) ... [2019-10-13 20:04:27,609 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label28.c [2019-10-13 20:04:27,622 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:04:27,632 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:04:27,645 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:04:27,678 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:04:27,678 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:04:27,678 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:04:27,678 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:04:27,679 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:04:27,679 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:04:27,679 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:04:27,679 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:04:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:04:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 20:04:27,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:27,718 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] [2019-10-13 20:04:27,720 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1610348989, now seen corresponding path program 1 times [2019-10-13 20:04:27,736 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:27,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351561744] [2019-10-13 20:04:27,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:27,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:27,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:28,242 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 20:04:28,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351561744] [2019-10-13 20:04:28,244 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:28,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:04:28,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236362733] [2019-10-13 20:04:28,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:04:28,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:28,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:04:28,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:28,272 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:04:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:30,393 INFO L93 Difference]: Finished difference Result 978 states and 1754 transitions. [2019-10-13 20:04:30,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:04:30,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2019-10-13 20:04:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:30,417 INFO L225 Difference]: With dead ends: 978 [2019-10-13 20:04:30,417 INFO L226 Difference]: Without dead ends: 619 [2019-10-13 20:04:30,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-10-13 20:04:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2019-10-13 20:04:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-10-13 20:04:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2019-10-13 20:04:30,519 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 54 [2019-10-13 20:04:30,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:30,519 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2019-10-13 20:04:30,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:04:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2019-10-13 20:04:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 20:04:30,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:30,535 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:30,535 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1973618443, now seen corresponding path program 1 times [2019-10-13 20:04:30,536 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:30,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126981696] [2019-10-13 20:04:30,537 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:30,537 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:30,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:30,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126981696] [2019-10-13 20:04:30,764 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:30,764 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:04:30,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476339996] [2019-10-13 20:04:30,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:04:30,772 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:04:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:30,772 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand 4 states. [2019-10-13 20:04:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:32,806 INFO L93 Difference]: Finished difference Result 2378 states and 3384 transitions. [2019-10-13 20:04:32,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:04:32,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-13 20:04:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:32,821 INFO L225 Difference]: With dead ends: 2378 [2019-10-13 20:04:32,821 INFO L226 Difference]: Without dead ends: 1765 [2019-10-13 20:04:32,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2019-10-13 20:04:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1750. [2019-10-13 20:04:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1750 states. [2019-10-13 20:04:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2347 transitions. [2019-10-13 20:04:32,903 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2347 transitions. Word has length 127 [2019-10-13 20:04:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:32,904 INFO L462 AbstractCegarLoop]: Abstraction has 1750 states and 2347 transitions. [2019-10-13 20:04:32,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:04:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2347 transitions. [2019-10-13 20:04:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:04:32,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:32,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:32,910 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1199392174, now seen corresponding path program 1 times [2019-10-13 20:04:32,911 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:32,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51256582] [2019-10-13 20:04:32,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:32,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:32,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:33,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51256582] [2019-10-13 20:04:33,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:33,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:04:33,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877216042] [2019-10-13 20:04:33,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:04:33,100 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:33,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:04:33,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:04:33,100 INFO L87 Difference]: Start difference. First operand 1750 states and 2347 transitions. Second operand 6 states. [2019-10-13 20:04:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:35,250 INFO L93 Difference]: Finished difference Result 4688 states and 6402 transitions. [2019-10-13 20:04:35,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:04:35,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-13 20:04:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:35,271 INFO L225 Difference]: With dead ends: 4688 [2019-10-13 20:04:35,271 INFO L226 Difference]: Without dead ends: 2944 [2019-10-13 20:04:35,278 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 20:04:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2019-10-13 20:04:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2929. [2019-10-13 20:04:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2929 states. [2019-10-13 20:04:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 3748 transitions. [2019-10-13 20:04:35,402 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 3748 transitions. Word has length 134 [2019-10-13 20:04:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:35,403 INFO L462 AbstractCegarLoop]: Abstraction has 2929 states and 3748 transitions. [2019-10-13 20:04:35,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:04:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 3748 transitions. [2019-10-13 20:04:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-13 20:04:35,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:35,414 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, 2, 2, 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] [2019-10-13 20:04:35,415 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:35,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:35,415 INFO L82 PathProgramCache]: Analyzing trace with hash -91916028, now seen corresponding path program 1 times [2019-10-13 20:04:35,415 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:35,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030264767] [2019-10-13 20:04:35,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:35,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:35,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 44 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:36,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030264767] [2019-10-13 20:04:36,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131889944] [2019-10-13 20:04:36,017 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 20:04:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:36,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:04:36,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:36,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 20:04:36,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:36,613 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-10-13 20:04:36,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:36,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:36,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:36,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:36,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:36,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:36,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:36,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:36,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:36,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 94 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:04:36,955 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:04:36,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2019-10-13 20:04:36,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020562809] [2019-10-13 20:04:36,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:04:36,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:36,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:04:36,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-13 20:04:36,961 INFO L87 Difference]: Start difference. First operand 2929 states and 3748 transitions. Second operand 5 states. [2019-10-13 20:04:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:40,669 INFO L93 Difference]: Finished difference Result 6100 states and 7871 transitions. [2019-10-13 20:04:40,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:04:40,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2019-10-13 20:04:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:40,688 INFO L225 Difference]: With dead ends: 6100 [2019-10-13 20:04:40,688 INFO L226 Difference]: Without dead ends: 3177 [2019-10-13 20:04:40,696 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2019-10-13 20:04:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2019-10-13 20:04:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 3154. [2019-10-13 20:04:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3154 states. [2019-10-13 20:04:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3154 states to 3154 states and 4036 transitions. [2019-10-13 20:04:40,785 INFO L78 Accepts]: Start accepts. Automaton has 3154 states and 4036 transitions. Word has length 207 [2019-10-13 20:04:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:40,786 INFO L462 AbstractCegarLoop]: Abstraction has 3154 states and 4036 transitions. [2019-10-13 20:04:40,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:04:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3154 states and 4036 transitions. [2019-10-13 20:04:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-13 20:04:40,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:40,792 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:04:40,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:40,998 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:40,999 INFO L82 PathProgramCache]: Analyzing trace with hash 563951691, now seen corresponding path program 1 times [2019-10-13 20:04:40,999 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:40,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088112509] [2019-10-13 20:04:40,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:41,000 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:41,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 20:04:41,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088112509] [2019-10-13 20:04:41,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568541581] [2019-10-13 20:04:41,386 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 [2019-10-13 20:04:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:41,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:04:41,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:41,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:41,606 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:41,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:41,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [331966986] [2019-10-13 20:04:41,849 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 251 [2019-10-13 20:04:41,936 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:04:41,937 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)