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/Problem16_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:09:36,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:09:36,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:09:36,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:09:36,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:09:36,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:09:36,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:09:36,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:09:36,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:09:36,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:09:36,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:09:36,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:09:36,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:09:36,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:09:36,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:09:36,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:09:36,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:09:36,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:09:36,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:09:36,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:09:36,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:09:36,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:09:36,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:09:36,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:09:36,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:09:36,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:09:36,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:09:36,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:09:36,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:09:36,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:09:36,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:09:36,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:09:36,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:09:36,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:09:36,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:09:36,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:09:36,376 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 20:09:36,397 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:09:36,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:09:36,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:09:36,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:09:36,402 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:09:36,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:09:36,402 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:09:36,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:09:36,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:09:36,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:09:36,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:09:36,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:09:36,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:09:36,405 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:09:36,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:09:36,405 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:09:36,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:09:36,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:09:36,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:09:36,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:09:36,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:09:36,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:09:36,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:09:36,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:09:36,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:09:36,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:09:36,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:09:36,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:09:36,408 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 20:09:36,741 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:09:36,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:09:36,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:09:36,761 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:09:36,761 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:09:36,762 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-10-13 20:09:36,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a306eee4d/4b1fc80b6c5444728005ffb70786261b/FLAG6e40eb2ba [2019-10-13 20:09:37,471 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:09:37,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-10-13 20:09:37,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a306eee4d/4b1fc80b6c5444728005ffb70786261b/FLAG6e40eb2ba [2019-10-13 20:09:37,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a306eee4d/4b1fc80b6c5444728005ffb70786261b [2019-10-13 20:09:37,673 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:09:37,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:09:37,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:37,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:09:37,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:09:37,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:37" (1/1) ... [2019-10-13 20:09:37,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47243856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37, skipping insertion in model container [2019-10-13 20:09:37,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:37" (1/1) ... [2019-10-13 20:09:37,691 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:09:37,770 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:09:38,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:38,537 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:09:38,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:38,822 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:09:38,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38 WrapperNode [2019-10-13 20:09:38,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:38,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:09:38,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:09:38,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:09:38,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38" (1/1) ... [2019-10-13 20:09:38,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38" (1/1) ... [2019-10-13 20:09:38,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38" (1/1) ... [2019-10-13 20:09:38,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38" (1/1) ... [2019-10-13 20:09:38,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38" (1/1) ... [2019-10-13 20:09:38,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38" (1/1) ... [2019-10-13 20:09:39,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38" (1/1) ... [2019-10-13 20:09:39,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:09:39,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:09:39,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:09:39,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:09:39,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38" (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 20:09:39,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:09:39,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:09:39,123 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:09:39,124 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:09:39,124 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:09:39,125 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:09:39,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:09:39,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:09:39,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:09:39,127 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:09:39,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:09:39,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:09:39,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:09:41,964 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:09:41,964 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:09:41,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:41 BoogieIcfgContainer [2019-10-13 20:09:41,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:09:41,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:09:41,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:09:41,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:09:41,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:37" (1/3) ... [2019-10-13 20:09:41,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de9f433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:41, skipping insertion in model container [2019-10-13 20:09:41,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:38" (2/3) ... [2019-10-13 20:09:41,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de9f433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:41, skipping insertion in model container [2019-10-13 20:09:41,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:41" (3/3) ... [2019-10-13 20:09:41,982 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label25.c [2019-10-13 20:09:41,994 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:09:42,004 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:09:42,018 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:09:42,051 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:09:42,051 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:09:42,051 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:09:42,051 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:09:42,051 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:09:42,052 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:09:42,052 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:09:42,052 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:09:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:09:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 20:09:42,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:42,102 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] [2019-10-13 20:09:42,106 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:42,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:42,113 INFO L82 PathProgramCache]: Analyzing trace with hash 134360965, now seen corresponding path program 1 times [2019-10-13 20:09:42,122 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:42,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458318592] [2019-10-13 20:09:42,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:42,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:42,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:42,428 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 20:09:42,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458318592] [2019-10-13 20:09:42,430 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:42,430 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:09:42,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960454422] [2019-10-13 20:09:42,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:09:42,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:42,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:09:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:42,457 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:09:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:44,862 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:09:44,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:09:44,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2019-10-13 20:09:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:44,886 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:09:44,886 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:09:44,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:09:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:09:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:09:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-10-13 20:09:45,011 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 56 [2019-10-13 20:09:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:45,012 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-10-13 20:09:45,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:09:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-10-13 20:09:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 20:09:45,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:45,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:45,022 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1822554259, now seen corresponding path program 1 times [2019-10-13 20:09:45,022 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:45,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124969782] [2019-10-13 20:09:45,023 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:45,023 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:45,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:45,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124969782] [2019-10-13 20:09:45,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:45,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:45,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434157824] [2019-10-13 20:09:45,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:45,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:45,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:45,357 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-10-13 20:09:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:48,018 INFO L93 Difference]: Finished difference Result 1733 states and 2953 transitions. [2019-10-13 20:09:48,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:48,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2019-10-13 20:09:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:48,029 INFO L225 Difference]: With dead ends: 1733 [2019-10-13 20:09:48,030 INFO L226 Difference]: Without dead ends: 1057 [2019-10-13 20:09:48,033 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 [2019-10-13 20:09:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-10-13 20:09:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-10-13 20:09:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-13 20:09:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-10-13 20:09:48,075 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 163 [2019-10-13 20:09:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:48,076 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-10-13 20:09:48,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-10-13 20:09:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 20:09:48,081 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:48,082 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:48,082 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1458338452, now seen corresponding path program 1 times [2019-10-13 20:09:48,083 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:48,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367670607] [2019-10-13 20:09:48,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:48,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:48,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:48,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367670607] [2019-10-13 20:09:48,347 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:48,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:48,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350733965] [2019-10-13 20:09:48,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:48,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:48,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:48,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:48,356 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-10-13 20:09:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:50,999 INFO L93 Difference]: Finished difference Result 3130 states and 5158 transitions. [2019-10-13 20:09:51,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:51,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2019-10-13 20:09:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:51,014 INFO L225 Difference]: With dead ends: 3130 [2019-10-13 20:09:51,021 INFO L226 Difference]: Without dead ends: 2097 [2019-10-13 20:09:51,028 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 [2019-10-13 20:09:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-10-13 20:09:51,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-10-13 20:09:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-13 20:09:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-10-13 20:09:51,106 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 166 [2019-10-13 20:09:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:51,109 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-10-13 20:09:51,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-10-13 20:09:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-13 20:09:51,128 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:51,129 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:09:51,129 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:51,130 INFO L82 PathProgramCache]: Analyzing trace with hash -169330708, now seen corresponding path program 1 times [2019-10-13 20:09:51,130 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:51,130 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966117335] [2019-10-13 20:09:51,130 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:51,131 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:51,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 98 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:51,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966117335] [2019-10-13 20:09:51,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061000115] [2019-10-13 20:09:51,443 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 20:09:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:51,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:09:51,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 20:09:51,732 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 98 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:51,912 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:09:51,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:09:51,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263399482] [2019-10-13 20:09:51,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:09:51,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:51,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:09:51,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:09:51,915 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 5 states. [2019-10-13 20:09:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:54,876 INFO L93 Difference]: Finished difference Result 6247 states and 9508 transitions. [2019-10-13 20:09:54,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:54,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 281 [2019-10-13 20:09:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:54,900 INFO L225 Difference]: With dead ends: 6247 [2019-10-13 20:09:54,900 INFO L226 Difference]: Without dead ends: 4172 [2019-10-13 20:09:54,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 557 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:09:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2019-10-13 20:09:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3821. [2019-10-13 20:09:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2019-10-13 20:09:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5206 transitions. [2019-10-13 20:09:55,035 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5206 transitions. Word has length 281 [2019-10-13 20:09:55,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:55,036 INFO L462 AbstractCegarLoop]: Abstraction has 3821 states and 5206 transitions. [2019-10-13 20:09:55,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:09:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5206 transitions. [2019-10-13 20:09:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2019-10-13 20:09:55,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:55,049 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:55,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:55,256 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:55,256 INFO L82 PathProgramCache]: Analyzing trace with hash 909641137, now seen corresponding path program 1 times [2019-10-13 20:09:55,256 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:55,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313969461] [2019-10-13 20:09:55,257 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:55,257 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:55,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 152 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:09:55,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313969461] [2019-10-13 20:09:55,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077206445] [2019-10-13 20:09:55,881 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 20:09:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:56,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:09:56,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 410 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 20:09:56,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 249 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-13 20:09:56,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [590648673] [2019-10-13 20:09:56,618 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 490 [2019-10-13 20:09:56,685 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:09:56,685 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:10:13,103 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:10:13,105 INFO L272 AbstractInterpreter]: Visited 224 different actions 224 times. Never merged. Never widened. Performed 422 root evaluator evaluations with a maximum evaluation depth of 14. Performed 422 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:10:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:13,109 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates