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/Problem17_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:10:34,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:10:34,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:10:34,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:10:34,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:10:34,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:10:34,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:10:34,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:10:34,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:10:34,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:10:34,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:10:34,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:10:34,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:10:34,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:10:34,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:10:34,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:10:34,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:10:34,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:10:34,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:10:34,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:10:34,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:10:34,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:10:34,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:10:34,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:10:34,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:10:34,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:10:34,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:10:34,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:10:34,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:10:34,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:10:34,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:10:34,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:10:34,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:10:34,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:10:34,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:10:34,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:10:34,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:10:34,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:10:34,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:10:34,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:10:34,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:10:34,420 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 20:10:34,453 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:10:34,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:10:34,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:10:34,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:10:34,460 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:10:34,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:10:34,460 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:10:34,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:10:34,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:10:34,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:10:34,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:10:34,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:10:34,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:10:34,462 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:10:34,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:10:34,462 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:10:34,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:10:34,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:10:34,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:10:34,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:10:34,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:10:34,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:34,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:10:34,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:10:34,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:10:34,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:10:34,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:10:34,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:10:34,466 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 20:10:34,750 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:10:34,767 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:10:34,771 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:10:34,773 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:10:34,773 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:10:34,774 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label30.c [2019-10-13 20:10:34,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d5c1f2db/dced1e6e5bf44cf7817408f913949e6f/FLAG847d12529 [2019-10-13 20:10:35,522 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:10:35,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label30.c [2019-10-13 20:10:35,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d5c1f2db/dced1e6e5bf44cf7817408f913949e6f/FLAG847d12529 [2019-10-13 20:10:35,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d5c1f2db/dced1e6e5bf44cf7817408f913949e6f [2019-10-13 20:10:35,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:10:35,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:10:35,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:35,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:10:35,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:10:35,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b20f996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35, skipping insertion in model container [2019-10-13 20:10:35,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,694 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:10:35,800 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:10:37,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:37,087 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:10:37,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:37,540 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:10:37,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37 WrapperNode [2019-10-13 20:10:37,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:37,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:10:37,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:10:37,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:10:37,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (1/1) ... [2019-10-13 20:10:37,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:10:37,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:10:37,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:10:37,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:10:37,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (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 20:10:37,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:10:37,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:10:37,914 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:10:37,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:10:37,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:10:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:10:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:10:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:10:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:10:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:10:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:10:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:10:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:10:42,123 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:10:42,124 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:10:42,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:42 BoogieIcfgContainer [2019-10-13 20:10:42,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:10:42,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:10:42,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:10:42,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:10:42,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:35" (1/3) ... [2019-10-13 20:10:42,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d08e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:42, skipping insertion in model container [2019-10-13 20:10:42,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:37" (2/3) ... [2019-10-13 20:10:42,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d08e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:42, skipping insertion in model container [2019-10-13 20:10:42,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:42" (3/3) ... [2019-10-13 20:10:42,135 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label30.c [2019-10-13 20:10:42,147 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:10:42,157 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:10:42,169 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:10:42,204 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:10:42,204 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:10:42,204 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:10:42,205 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:10:42,205 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:10:42,205 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:10:42,205 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:10:42,205 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:10:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-10-13 20:10:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 20:10:42,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:42,251 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] [2019-10-13 20:10:42,253 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash 993587001, now seen corresponding path program 1 times [2019-10-13 20:10:42,270 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:42,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27160346] [2019-10-13 20:10:42,271 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:42,272 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:42,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:42,581 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 20:10:42,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27160346] [2019-10-13 20:10:42,583 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:42,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:10:42,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971932246] [2019-10-13 20:10:42,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:10:42,589 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:42,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:10:42,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:10:42,608 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-10-13 20:10:49,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:49,217 INFO L93 Difference]: Finished difference Result 2158 states and 4003 transitions. [2019-10-13 20:10:49,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:10:49,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-13 20:10:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:49,258 INFO L225 Difference]: With dead ends: 2158 [2019-10-13 20:10:49,258 INFO L226 Difference]: Without dead ends: 1474 [2019-10-13 20:10:49,268 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 20:10:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2019-10-13 20:10:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1447. [2019-10-13 20:10:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1447 states. [2019-10-13 20:10:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2481 transitions. [2019-10-13 20:10:49,407 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2481 transitions. Word has length 30 [2019-10-13 20:10:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:49,407 INFO L462 AbstractCegarLoop]: Abstraction has 1447 states and 2481 transitions. [2019-10-13 20:10:49,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:10:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2481 transitions. [2019-10-13 20:10:49,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 20:10:49,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:49,414 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:10:49,414 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:49,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:49,415 INFO L82 PathProgramCache]: Analyzing trace with hash -122191608, now seen corresponding path program 1 times [2019-10-13 20:10:49,415 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:49,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230281336] [2019-10-13 20:10:49,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:49,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:49,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:49,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230281336] [2019-10-13 20:10:49,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:49,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:49,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918574273] [2019-10-13 20:10:49,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:49,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:49,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:49,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:49,640 INFO L87 Difference]: Start difference. First operand 1447 states and 2481 transitions. Second operand 6 states. [2019-10-13 20:10:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:58,599 INFO L93 Difference]: Finished difference Result 5604 states and 9931 transitions. [2019-10-13 20:10:58,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:58,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-13 20:10:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:58,634 INFO L225 Difference]: With dead ends: 5604 [2019-10-13 20:10:58,634 INFO L226 Difference]: Without dead ends: 4163 [2019-10-13 20:10:58,641 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 20:10:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2019-10-13 20:10:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 4140. [2019-10-13 20:10:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4140 states. [2019-10-13 20:10:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6054 transitions. [2019-10-13 20:10:58,795 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6054 transitions. Word has length 108 [2019-10-13 20:10:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:58,796 INFO L462 AbstractCegarLoop]: Abstraction has 4140 states and 6054 transitions. [2019-10-13 20:10:58,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6054 transitions. [2019-10-13 20:10:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-13 20:10:58,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:58,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:10:58,806 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:58,807 INFO L82 PathProgramCache]: Analyzing trace with hash -771762316, now seen corresponding path program 1 times [2019-10-13 20:10:58,807 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:58,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147730194] [2019-10-13 20:10:58,809 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:58,809 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:58,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:58,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147730194] [2019-10-13 20:10:58,985 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:58,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:58,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10414867] [2019-10-13 20:10:58,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:58,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:58,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:58,991 INFO L87 Difference]: Start difference. First operand 4140 states and 6054 transitions. Second operand 6 states. [2019-10-13 20:11:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:03,593 INFO L93 Difference]: Finished difference Result 12482 states and 19729 transitions. [2019-10-13 20:11:03,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:03,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-10-13 20:11:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:03,649 INFO L225 Difference]: With dead ends: 12482 [2019-10-13 20:11:03,650 INFO L226 Difference]: Without dead ends: 8348 [2019-10-13 20:11:03,669 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 [2019-10-13 20:11:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8348 states. [2019-10-13 20:11:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8348 to 8275. [2019-10-13 20:11:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8275 states. [2019-10-13 20:11:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8275 states to 8275 states and 12053 transitions. [2019-10-13 20:11:03,911 INFO L78 Accepts]: Start accepts. Automaton has 8275 states and 12053 transitions. Word has length 109 [2019-10-13 20:11:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:03,912 INFO L462 AbstractCegarLoop]: Abstraction has 8275 states and 12053 transitions. [2019-10-13 20:11:03,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 8275 states and 12053 transitions. [2019-10-13 20:11:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 20:11:03,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:03,922 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:11:03,922 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:03,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:03,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1769517215, now seen corresponding path program 1 times [2019-10-13 20:11:03,923 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:03,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514263780] [2019-10-13 20:11:03,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:03,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:03,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-13 20:11:04,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514263780] [2019-10-13 20:11:04,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451086611] [2019-10-13 20:11:04,284 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 20:11:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:04,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:11:04,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:04,497 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:04,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1360314944] [2019-10-13 20:11:04,674 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 183 [2019-10-13 20:11:04,734 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:11:04,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:11:07,985 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-13 20:11:10,121 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:11:10,123 INFO L272 AbstractInterpreter]: Visited 86 different actions 167 times. Merged at 4 different actions 5 times. Never widened. Performed 389 root evaluator evaluations with a maximum evaluation depth of 15. Performed 389 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-10-13 20:11:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:10,128 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates