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_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:10:30,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:10:30,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:10:30,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:10:30,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:10:30,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:10:30,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:10:30,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:10:30,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:10:30,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:10:30,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:10:30,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:10:30,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:10:30,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:10:30,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:10:30,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:10:30,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:10:30,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:10:30,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:10:30,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:10:30,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:10:30,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:10:30,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:10:30,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:10:30,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:10:30,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:10:30,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:10:30,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:10:30,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:10:30,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:10:30,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:10:30,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:10:30,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:10:30,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:10:30,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:10:30,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:10:30,456 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 20:10:30,469 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:10:30,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:10:30,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:10:30,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:10:30,471 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:10:30,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:10:30,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:10:30,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:10:30,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:10:30,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:10:30,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:10:30,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:10:30,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:10:30,473 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:10:30,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:10:30,474 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:10:30,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:10:30,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:10:30,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:10:30,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:10:30,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:10:30,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:30,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:10:30,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:10:30,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:10:30,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:10:30,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:10:30,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:10:30,476 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 20:10:30,744 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:10:30,757 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:10:30,761 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:10:30,762 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:10:30,763 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:10:30,763 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-10-13 20:10:30,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b77e36764/ed2a9ed5cb1a436c91cadefeb0662cdb/FLAG979d0d326 [2019-10-13 20:10:31,454 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:10:31,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-10-13 20:10:31,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b77e36764/ed2a9ed5cb1a436c91cadefeb0662cdb/FLAG979d0d326 [2019-10-13 20:10:31,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b77e36764/ed2a9ed5cb1a436c91cadefeb0662cdb [2019-10-13 20:10:31,651 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:10:31,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:10:31,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:31,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:10:31,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:10:31,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:31" (1/1) ... [2019-10-13 20:10:31,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6912290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:31, skipping insertion in model container [2019-10-13 20:10:31,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:31" (1/1) ... [2019-10-13 20:10:31,671 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:10:31,745 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:10:32,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:32,578 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:10:32,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:32,839 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:10:32,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32 WrapperNode [2019-10-13 20:10:32,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:32,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:10:32,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:10:32,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:10:32,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32" (1/1) ... [2019-10-13 20:10:32,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32" (1/1) ... [2019-10-13 20:10:32,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32" (1/1) ... [2019-10-13 20:10:32,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32" (1/1) ... [2019-10-13 20:10:32,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32" (1/1) ... [2019-10-13 20:10:33,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32" (1/1) ... [2019-10-13 20:10:33,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32" (1/1) ... [2019-10-13 20:10:33,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:10:33,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:10:33,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:10:33,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:10:33,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32" (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 20:10:33,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:10:33,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:10:33,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:10:33,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:10:33,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:10:33,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:10:33,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:10:33,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:10:33,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:10:33,128 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:10:33,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:10:33,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:10:33,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:10:35,292 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:10:35,292 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:10:35,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:35 BoogieIcfgContainer [2019-10-13 20:10:35,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:10:35,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:10:35,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:10:35,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:10:35,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:31" (1/3) ... [2019-10-13 20:10:35,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81b5ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:35, skipping insertion in model container [2019-10-13 20:10:35,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:32" (2/3) ... [2019-10-13 20:10:35,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81b5ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:35, skipping insertion in model container [2019-10-13 20:10:35,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:35" (3/3) ... [2019-10-13 20:10:35,309 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label58.c [2019-10-13 20:10:35,320 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:10:35,328 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:10:35,340 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:10:35,369 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:10:35,369 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:10:35,370 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:10:35,370 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:10:35,370 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:10:35,370 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:10:35,370 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:10:35,370 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:10:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:10:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 20:10:35,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:35,407 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:35,408 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:35,414 INFO L82 PathProgramCache]: Analyzing trace with hash -129772806, now seen corresponding path program 1 times [2019-10-13 20:10:35,423 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:35,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057892089] [2019-10-13 20:10:35,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:35,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:35,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:35,766 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 20:10:35,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057892089] [2019-10-13 20:10:35,768 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:35,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:10:35,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892915189] [2019-10-13 20:10:35,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:10:35,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:35,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:10:35,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:10:35,793 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:10:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:37,986 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:10:37,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:10:37,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-10-13 20:10:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:38,009 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:10:38,009 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:10:38,019 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 20:10:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:10:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:10:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:10:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-13 20:10:38,120 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 57 [2019-10-13 20:10:38,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:38,121 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-13 20:10:38,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:10:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-13 20:10:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 20:10:38,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:38,130 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:10:38,131 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:38,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1636148102, now seen corresponding path program 1 times [2019-10-13 20:10:38,132 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:38,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900544556] [2019-10-13 20:10:38,133 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:38,133 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:38,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:38,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900544556] [2019-10-13 20:10:38,411 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:38,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:38,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903139651] [2019-10-13 20:10:38,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:38,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:38,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:38,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:38,414 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-10-13 20:10:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:40,865 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-10-13 20:10:40,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:40,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-13 20:10:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:40,876 INFO L225 Difference]: With dead ends: 1730 [2019-10-13 20:10:40,876 INFO L226 Difference]: Without dead ends: 1054 [2019-10-13 20:10:40,879 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 20:10:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-10-13 20:10:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-10-13 20:10:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-10-13 20:10:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-10-13 20:10:40,922 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 149 [2019-10-13 20:10:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:40,923 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-10-13 20:10:40,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-10-13 20:10:40,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-13 20:10:40,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:40,929 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, 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, 1, 1, 1, 1, 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 20:10:40,929 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:40,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1608986538, now seen corresponding path program 1 times [2019-10-13 20:10:40,930 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:40,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767778453] [2019-10-13 20:10:40,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:40,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:40,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:41,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767778453] [2019-10-13 20:10:41,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150411042] [2019-10-13 20:10:41,181 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 20:10:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:41,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:10:41,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 20:10:41,540 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:41,703 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:10:41,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:10:41,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272863846] [2019-10-13 20:10:41,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:41,707 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:41,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:41,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:10:41,716 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-10-13 20:10:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:45,916 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-10-13 20:10:45,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:45,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-10-13 20:10:45,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:45,926 INFO L225 Difference]: With dead ends: 2427 [2019-10-13 20:10:45,927 INFO L226 Difference]: Without dead ends: 1399 [2019-10-13 20:10:45,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 513 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:10:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-10-13 20:10:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-10-13 20:10:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-10-13 20:10:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-10-13 20:10:45,970 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 259 [2019-10-13 20:10:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:45,970 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-10-13 20:10:45,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-10-13 20:10:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-10-13 20:10:45,975 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:45,975 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, 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, 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] [2019-10-13 20:10:46,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:46,180 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1534419377, now seen corresponding path program 1 times [2019-10-13 20:10:46,181 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:46,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044190410] [2019-10-13 20:10:46,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:46,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:46,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-13 20:10:46,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044190410] [2019-10-13 20:10:46,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538805731] [2019-10-13 20:10:46,485 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 20:10:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:46,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:10:46,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-10-13 20:10:46,707 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-13 20:10:46,886 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:10:46,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-13 20:10:46,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869293354] [2019-10-13 20:10:46,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:46,887 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:46,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:46,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:10:46,888 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-10-13 20:10:49,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:49,888 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-10-13 20:10:49,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:10:49,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2019-10-13 20:10:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:49,910 INFO L225 Difference]: With dead ends: 4241 [2019-10-13 20:10:49,910 INFO L226 Difference]: Without dead ends: 2859 [2019-10-13 20:10:49,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 666 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:10:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-10-13 20:10:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-10-13 20:10:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-10-13 20:10:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4286 transitions. [2019-10-13 20:10:50,014 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4286 transitions. Word has length 334 [2019-10-13 20:10:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:50,015 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4286 transitions. [2019-10-13 20:10:50,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4286 transitions. [2019-10-13 20:10:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-10-13 20:10:50,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:50,024 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, 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, 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] [2019-10-13 20:10:50,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:50,238 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:50,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:50,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1718340841, now seen corresponding path program 1 times [2019-10-13 20:10:50,238 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:50,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492211050] [2019-10-13 20:10:50,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:50,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:50,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 150 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-13 20:10:50,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492211050] [2019-10-13 20:10:50,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109598123] [2019-10-13 20:10:50,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:50,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:10:50,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-10-13 20:10:50,941 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 150 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-13 20:10:51,094 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:10:51,094 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:10:51,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050384507] [2019-10-13 20:10:51,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:51,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:51,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:51,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:10:51,096 INFO L87 Difference]: Start difference. First operand 2819 states and 4286 transitions. Second operand 5 states. [2019-10-13 20:10:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:53,695 INFO L93 Difference]: Finished difference Result 8487 states and 13369 transitions. [2019-10-13 20:10:53,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:10:53,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 338 [2019-10-13 20:10:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:53,726 INFO L225 Difference]: With dead ends: 8487 [2019-10-13 20:10:53,726 INFO L226 Difference]: Without dead ends: 5674 [2019-10-13 20:10:53,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 671 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:10:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-10-13 20:10:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-10-13 20:10:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-10-13 20:10:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7782 transitions. [2019-10-13 20:10:53,905 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7782 transitions. Word has length 338 [2019-10-13 20:10:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:53,909 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7782 transitions. [2019-10-13 20:10:53,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7782 transitions. [2019-10-13 20:10:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2019-10-13 20:10:53,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:53,919 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:10:54,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:54,124 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1405018386, now seen corresponding path program 1 times [2019-10-13 20:10:54,125 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:54,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176431542] [2019-10-13 20:10:54,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:54,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:54,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:54,756 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-10-13 20:10:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:55,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176431542] [2019-10-13 20:10:55,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710091772] [2019-10-13 20:10:55,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:55,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:10:55,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:55,572 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:55,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [316988359] [2019-10-13 20:10:55,838 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 364 [2019-10-13 20:10:55,893 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:10:55,894 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:11:00,533 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.