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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:09:05,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:09:05,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:09:05,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:09:05,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:09:05,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:09:05,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:09:05,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:09:05,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:09:05,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:09:05,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:09:05,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:09:05,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:09:05,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:09:05,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:09:05,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:09:05,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:09:05,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:09:05,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:09:05,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:09:05,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:09:05,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:09:05,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:09:05,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:09:05,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:09:05,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:09:05,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:09:05,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:09:05,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:09:05,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:09:05,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:09:05,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:09:05,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:09:05,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:09:05,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:09:05,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:09:05,546 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 20:09:05,559 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:09:05,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:09:05,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:09:05,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:09:05,561 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:09:05,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:09:05,562 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:09:05,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:09:05,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:09:05,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:09:05,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:09:05,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:09:05,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:09:05,563 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:09:05,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:09:05,563 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:09:05,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:09:05,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:09:05,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:09:05,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:09:05,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:09:05,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:09:05,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:09:05,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:09:05,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:09:05,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:09:05,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:09:05,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:09:05,566 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 20:09:05,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:09:05,871 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:09:05,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:09:05,876 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:09:05,876 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:09:05,877 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-13 20:09:05,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3d1de70c/4e32a4fa537d43ae9cc09b92c2622cf3/FLAG247f19ab6 [2019-10-13 20:09:06,609 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:09:06,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-13 20:09:06,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3d1de70c/4e32a4fa537d43ae9cc09b92c2622cf3/FLAG247f19ab6 [2019-10-13 20:09:06,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3d1de70c/4e32a4fa537d43ae9cc09b92c2622cf3 [2019-10-13 20:09:06,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:09:06,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:09:06,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:06,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:09:06,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:09:06,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:06" (1/1) ... [2019-10-13 20:09:06,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a02677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:06, skipping insertion in model container [2019-10-13 20:09:06,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:06" (1/1) ... [2019-10-13 20:09:06,826 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:09:06,918 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:09:07,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:07,808 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:09:08,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:08,163 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:09:08,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08 WrapperNode [2019-10-13 20:09:08,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:08,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:09:08,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:09:08,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:09:08,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08" (1/1) ... [2019-10-13 20:09:08,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08" (1/1) ... [2019-10-13 20:09:08,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08" (1/1) ... [2019-10-13 20:09:08,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08" (1/1) ... [2019-10-13 20:09:08,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08" (1/1) ... [2019-10-13 20:09:08,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08" (1/1) ... [2019-10-13 20:09:08,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08" (1/1) ... [2019-10-13 20:09:08,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:09:08,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:09:08,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:09:08,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:09:08,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08" (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 20:09:08,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:09:08,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:09:08,425 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:09:08,426 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:09:08,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:09:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:09:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:09:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:09:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:09:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:09:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:09:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:09:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:09:10,712 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:09:10,713 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:09:10,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:10 BoogieIcfgContainer [2019-10-13 20:09:10,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:09:10,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:09:10,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:09:10,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:09:10,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:06" (1/3) ... [2019-10-13 20:09:10,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226485ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:10, skipping insertion in model container [2019-10-13 20:09:10,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:08" (2/3) ... [2019-10-13 20:09:10,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226485ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:10, skipping insertion in model container [2019-10-13 20:09:10,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:10" (3/3) ... [2019-10-13 20:09:10,723 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2019-10-13 20:09:10,733 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:09:10,742 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:09:10,753 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:09:10,783 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:09:10,783 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:09:10,783 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:09:10,783 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:09:10,784 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:09:10,784 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:09:10,784 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:09:10,784 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:09:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:09:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 20:09:10,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:10,823 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:10,825 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash -586545963, now seen corresponding path program 1 times [2019-10-13 20:09:10,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:10,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844409626] [2019-10-13 20:09:10,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:10,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:10,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:11,174 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 20:09:11,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844409626] [2019-10-13 20:09:11,176 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:11,176 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:09:11,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193269314] [2019-10-13 20:09:11,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:09:11,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:09:11,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:11,201 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:09:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:15,945 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:09:15,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:09:15,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-10-13 20:09:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:15,969 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:09:15,970 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:09:15,980 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 20:09:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:09:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:09:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:09:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1154 transitions. [2019-10-13 20:09:16,125 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1154 transitions. Word has length 60 [2019-10-13 20:09:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:16,126 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1154 transitions. [2019-10-13 20:09:16,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:09:16,126 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1154 transitions. [2019-10-13 20:09:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 20:09:16,134 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:16,134 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 20:09:16,135 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1735550147, now seen corresponding path program 1 times [2019-10-13 20:09:16,135 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:16,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590290684] [2019-10-13 20:09:16,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:16,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:16,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:16,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590290684] [2019-10-13 20:09:16,437 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:16,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:16,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860084781] [2019-10-13 20:09:16,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:16,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:16,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:16,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:16,440 INFO L87 Difference]: Start difference. First operand 682 states and 1154 transitions. Second operand 6 states. [2019-10-13 20:09:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:21,717 INFO L93 Difference]: Finished difference Result 2806 states and 4911 transitions. [2019-10-13 20:09:21,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 20:09:21,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-10-13 20:09:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:21,743 INFO L225 Difference]: With dead ends: 2806 [2019-10-13 20:09:21,743 INFO L226 Difference]: Without dead ends: 2130 [2019-10-13 20:09:21,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:09:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2019-10-13 20:09:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2087. [2019-10-13 20:09:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2019-10-13 20:09:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3381 transitions. [2019-10-13 20:09:21,861 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3381 transitions. Word has length 135 [2019-10-13 20:09:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:21,863 INFO L462 AbstractCegarLoop]: Abstraction has 2087 states and 3381 transitions. [2019-10-13 20:09:21,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3381 transitions. [2019-10-13 20:09:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 20:09:21,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:21,875 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:21,875 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:21,876 INFO L82 PathProgramCache]: Analyzing trace with hash -98267403, now seen corresponding path program 1 times [2019-10-13 20:09:21,876 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:21,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532557590] [2019-10-13 20:09:21,878 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:21,878 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:21,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:22,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532557590] [2019-10-13 20:09:22,091 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:22,091 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:22,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187081471] [2019-10-13 20:09:22,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:22,092 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:22,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:22,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:22,093 INFO L87 Difference]: Start difference. First operand 2087 states and 3381 transitions. Second operand 6 states. [2019-10-13 20:09:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:24,927 INFO L93 Difference]: Finished difference Result 5623 states and 9425 transitions. [2019-10-13 20:09:24,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:24,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-10-13 20:09:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:24,954 INFO L225 Difference]: With dead ends: 5623 [2019-10-13 20:09:24,962 INFO L226 Difference]: Without dead ends: 3542 [2019-10-13 20:09:24,969 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 20:09:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-10-13 20:09:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3503. [2019-10-13 20:09:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2019-10-13 20:09:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5695 transitions. [2019-10-13 20:09:25,088 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5695 transitions. Word has length 139 [2019-10-13 20:09:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:25,090 INFO L462 AbstractCegarLoop]: Abstraction has 3503 states and 5695 transitions. [2019-10-13 20:09:25,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5695 transitions. [2019-10-13 20:09:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 20:09:25,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:25,094 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:25,094 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1876426643, now seen corresponding path program 1 times [2019-10-13 20:09:25,095 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:25,095 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467664772] [2019-10-13 20:09:25,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:25,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:25,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:25,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467664772] [2019-10-13 20:09:25,269 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:25,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:25,269 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283411700] [2019-10-13 20:09:25,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:25,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:25,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:25,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:25,271 INFO L87 Difference]: Start difference. First operand 3503 states and 5695 transitions. Second operand 6 states. [2019-10-13 20:09:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:27,772 INFO L93 Difference]: Finished difference Result 8509 states and 14335 transitions. [2019-10-13 20:09:27,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:27,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2019-10-13 20:09:27,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:27,803 INFO L225 Difference]: With dead ends: 8509 [2019-10-13 20:09:27,803 INFO L226 Difference]: Without dead ends: 5012 [2019-10-13 20:09:27,816 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 20:09:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2019-10-13 20:09:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4965. [2019-10-13 20:09:27,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4965 states. [2019-10-13 20:09:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 7684 transitions. [2019-10-13 20:09:28,056 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 7684 transitions. Word has length 175 [2019-10-13 20:09:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:28,057 INFO L462 AbstractCegarLoop]: Abstraction has 4965 states and 7684 transitions. [2019-10-13 20:09:28,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 7684 transitions. [2019-10-13 20:09:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-13 20:09:28,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:28,065 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:28,065 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1318797007, now seen corresponding path program 1 times [2019-10-13 20:09:28,068 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:28,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385527795] [2019-10-13 20:09:28,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:28,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:28,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 106 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:28,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385527795] [2019-10-13 20:09:28,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478977134] [2019-10-13 20:09:28,328 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 20:09:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:28,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:09:28,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 20:09:28,552 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 106 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:28,674 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:09:28,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-13 20:09:28,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904940487] [2019-10-13 20:09:28,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:09:28,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:28,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:09:28,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:09:28,676 INFO L87 Difference]: Start difference. First operand 4965 states and 7684 transitions. Second operand 5 states. [2019-10-13 20:09:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:31,377 INFO L93 Difference]: Finished difference Result 11032 states and 17418 transitions. [2019-10-13 20:09:31,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:09:31,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2019-10-13 20:09:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:31,411 INFO L225 Difference]: With dead ends: 11032 [2019-10-13 20:09:31,412 INFO L226 Difference]: Without dead ends: 6073 [2019-10-13 20:09:31,428 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 442 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:09:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6073 states. [2019-10-13 20:09:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6073 to 5682. [2019-10-13 20:09:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5682 states. [2019-10-13 20:09:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5682 states to 5682 states and 8063 transitions. [2019-10-13 20:09:31,668 INFO L78 Accepts]: Start accepts. Automaton has 5682 states and 8063 transitions. Word has length 224 [2019-10-13 20:09:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:31,668 INFO L462 AbstractCegarLoop]: Abstraction has 5682 states and 8063 transitions. [2019-10-13 20:09:31,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:09:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand 5682 states and 8063 transitions. [2019-10-13 20:09:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 20:09:31,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:31,673 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:31,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:31,879 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 396142693, now seen corresponding path program 1 times [2019-10-13 20:09:31,880 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:31,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047220437] [2019-10-13 20:09:31,881 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:31,881 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:31,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 107 proven. 14 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-13 20:09:32,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047220437] [2019-10-13 20:09:32,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126910181] [2019-10-13 20:09:32,121 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 20:09:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:32,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:09:32,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:32,310 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:32,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2002287813] [2019-10-13 20:09:32,420 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 235 [2019-10-13 20:09:32,470 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:09:32,471 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:09:37,255 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-13 20:09:39,298 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:09:39,302 INFO L272 AbstractInterpreter]: Visited 99 different actions 193 times. Merged at 4 different actions 5 times. Never widened. Performed 447 root evaluator evaluations with a maximum evaluation depth of 14. Performed 447 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:09:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:39,307 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates