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_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:09:10,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:09:10,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:09:10,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:09:10,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:09:10,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:09:10,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:09:10,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:09:10,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:09:10,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:09:10,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:09:10,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:09:10,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:09:10,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:09:10,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:09:10,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:09:10,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:09:10,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:09:10,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:09:10,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:09:10,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:09:10,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:09:10,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:09:10,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:09:10,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:09:10,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:09:10,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:09:10,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:09:10,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:09:10,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:09:10,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:09:10,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:09:10,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:09:10,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:09:10,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:09:10,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:09:10,113 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 20:09:10,142 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:09:10,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:09:10,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:09:10,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:09:10,145 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:09:10,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:09:10,146 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:09:10,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:09:10,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:09:10,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:09:10,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:09:10,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:09:10,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:09:10,148 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:09:10,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:09:10,148 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:09:10,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:09:10,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:09:10,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:09:10,149 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:09:10,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:09:10,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:09:10,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:09:10,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:09:10,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:09:10,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:09:10,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:09:10,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:09:10,151 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 20:09:10,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:09:10,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:09:10,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:09:10,457 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:09:10,457 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:09:10,458 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-10-13 20:09:10,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b415a1a/7f18f65b33e44e9592dabd378291f1ce/FLAGddd614bfe [2019-10-13 20:09:11,139 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:09:11,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-10-13 20:09:11,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b415a1a/7f18f65b33e44e9592dabd378291f1ce/FLAGddd614bfe [2019-10-13 20:09:11,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b415a1a/7f18f65b33e44e9592dabd378291f1ce [2019-10-13 20:09:11,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:09:11,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:09:11,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:11,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:09:11,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:09:11,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:11" (1/1) ... [2019-10-13 20:09:11,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6063a733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:11, skipping insertion in model container [2019-10-13 20:09:11,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:11" (1/1) ... [2019-10-13 20:09:11,383 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:09:11,464 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:09:12,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:12,397 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:09:12,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:12,718 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:09:12,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12 WrapperNode [2019-10-13 20:09:12,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:12,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:09:12,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:09:12,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:09:12,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12" (1/1) ... [2019-10-13 20:09:12,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12" (1/1) ... [2019-10-13 20:09:12,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12" (1/1) ... [2019-10-13 20:09:12,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12" (1/1) ... [2019-10-13 20:09:12,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12" (1/1) ... [2019-10-13 20:09:12,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12" (1/1) ... [2019-10-13 20:09:12,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12" (1/1) ... [2019-10-13 20:09:12,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:09:12,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:09:12,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:09:12,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:09:12,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12" (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 20:09:12,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:09:12,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:09:12,981 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:09:12,981 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:09:12,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:09:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:09:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:09:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:09:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:09:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:09:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:09:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:09:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:09:15,319 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:09:15,320 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:09:15,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:15 BoogieIcfgContainer [2019-10-13 20:09:15,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:09:15,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:09:15,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:09:15,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:09:15,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:11" (1/3) ... [2019-10-13 20:09:15,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129ddeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:15, skipping insertion in model container [2019-10-13 20:09:15,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:12" (2/3) ... [2019-10-13 20:09:15,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129ddeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:15, skipping insertion in model container [2019-10-13 20:09:15,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:15" (3/3) ... [2019-10-13 20:09:15,343 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label11.c [2019-10-13 20:09:15,353 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:09:15,364 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:09:15,376 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:09:15,420 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:09:15,421 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:09:15,421 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:09:15,421 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:09:15,421 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:09:15,421 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:09:15,421 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:09:15,422 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:09:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:09:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 20:09:15,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:15,473 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, 1] [2019-10-13 20:09:15,475 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1003051062, now seen corresponding path program 1 times [2019-10-13 20:09:15,490 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:15,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261401817] [2019-10-13 20:09:15,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:15,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:15,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:15,824 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 20:09:15,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261401817] [2019-10-13 20:09:15,826 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:15,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:09:15,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023257459] [2019-10-13 20:09:15,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:09:15,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:09:15,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:15,851 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:09:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:18,060 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:09:18,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:09:18,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-10-13 20:09:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:18,084 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:09:18,084 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:09:18,094 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 20:09:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:09:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:09:18,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:09:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-10-13 20:09:18,193 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 61 [2019-10-13 20:09:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:18,194 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-10-13 20:09:18,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:09:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-10-13 20:09:18,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 20:09:18,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:18,200 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, 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] [2019-10-13 20:09:18,201 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1399533719, now seen corresponding path program 1 times [2019-10-13 20:09:18,201 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:18,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642503282] [2019-10-13 20:09:18,202 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:18,202 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:18,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:18,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642503282] [2019-10-13 20:09:18,429 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:18,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:09:18,430 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404562048] [2019-10-13 20:09:18,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:09:18,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:09:18,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:09:18,433 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-10-13 20:09:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:21,191 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-10-13 20:09:21,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:21,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-13 20:09:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:21,210 INFO L225 Difference]: With dead ends: 2066 [2019-10-13 20:09:21,210 INFO L226 Difference]: Without dead ends: 1390 [2019-10-13 20:09:21,213 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:09:21,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-10-13 20:09:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-10-13 20:09:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-10-13 20:09:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-10-13 20:09:21,293 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 130 [2019-10-13 20:09:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:21,294 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-10-13 20:09:21,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:09:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-10-13 20:09:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 20:09:21,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:21,301 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, 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] [2019-10-13 20:09:21,301 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:21,302 INFO L82 PathProgramCache]: Analyzing trace with hash -32887422, now seen corresponding path program 1 times [2019-10-13 20:09:21,302 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:21,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998593371] [2019-10-13 20:09:21,303 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:21,304 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:21,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:21,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998593371] [2019-10-13 20:09:21,552 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:21,553 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:21,553 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743254597] [2019-10-13 20:09:21,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:21,554 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:21,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:21,554 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-10-13 20:09:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:24,111 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-10-13 20:09:24,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:24,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-10-13 20:09:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:24,127 INFO L225 Difference]: With dead ends: 3472 [2019-10-13 20:09:24,136 INFO L226 Difference]: Without dead ends: 2106 [2019-10-13 20:09:24,141 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 20:09:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-13 20:09:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-10-13 20:09:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-13 20:09:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-10-13 20:09:24,220 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 159 [2019-10-13 20:09:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:24,221 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-10-13 20:09:24,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-10-13 20:09:24,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 20:09:24,231 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:24,231 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, 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 20:09:24,232 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:24,232 INFO L82 PathProgramCache]: Analyzing trace with hash -909637690, now seen corresponding path program 1 times [2019-10-13 20:09:24,232 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:24,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665249857] [2019-10-13 20:09:24,233 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:24,233 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:24,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:24,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665249857] [2019-10-13 20:09:24,410 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:24,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:24,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667280848] [2019-10-13 20:09:24,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:24,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:24,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:24,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:24,412 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-10-13 20:09:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:26,710 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-10-13 20:09:26,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:26,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2019-10-13 20:09:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:26,730 INFO L225 Difference]: With dead ends: 5241 [2019-10-13 20:09:26,731 INFO L226 Difference]: Without dead ends: 3166 [2019-10-13 20:09:26,737 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 20:09:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-10-13 20:09:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-10-13 20:09:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-10-13 20:09:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-10-13 20:09:26,824 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 177 [2019-10-13 20:09:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:26,826 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-10-13 20:09:26,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-10-13 20:09:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-13 20:09:26,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:26,830 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:26,831 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:26,831 INFO L82 PathProgramCache]: Analyzing trace with hash -81123022, now seen corresponding path program 1 times [2019-10-13 20:09:26,831 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:26,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914573517] [2019-10-13 20:09:26,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:26,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:26,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 120 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:09:27,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914573517] [2019-10-13 20:09:27,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887549928] [2019-10-13 20:09:27,157 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 20:09:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:27,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:09:27,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 20:09:27,410 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 20:09:27,513 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:09:27,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-10-13 20:09:27,513 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166967471] [2019-10-13 20:09:27,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:09:27,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:27,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:09:27,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:09:27,516 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-10-13 20:09:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:32,428 INFO L93 Difference]: Finished difference Result 8317 states and 11073 transitions. [2019-10-13 20:09:32,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:09:32,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 259 [2019-10-13 20:09:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:32,455 INFO L225 Difference]: With dead ends: 8317 [2019-10-13 20:09:32,455 INFO L226 Difference]: Without dead ends: 5183 [2019-10-13 20:09:32,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:09:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2019-10-13 20:09:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 4842. [2019-10-13 20:09:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4842 states. [2019-10-13 20:09:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 6246 transitions. [2019-10-13 20:09:32,597 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 6246 transitions. Word has length 259 [2019-10-13 20:09:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:32,598 INFO L462 AbstractCegarLoop]: Abstraction has 4842 states and 6246 transitions. [2019-10-13 20:09:32,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:09:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 6246 transitions. [2019-10-13 20:09:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2019-10-13 20:09:32,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:32,616 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:09:32,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:32,821 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:32,822 INFO L82 PathProgramCache]: Analyzing trace with hash 479925678, now seen corresponding path program 1 times [2019-10-13 20:09:32,822 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:32,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231718543] [2019-10-13 20:09:32,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:32,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:32,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 279 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-13 20:09:33,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231718543] [2019-10-13 20:09:33,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219733062] [2019-10-13 20:09:33,448 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 20:09:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:33,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:09:33,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 464 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 20:09:33,872 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 279 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-13 20:09:34,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [529769996] [2019-10-13 20:09:34,170 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 504 [2019-10-13 20:09:34,232 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:09:34,233 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:09:47,300 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:09:47,302 INFO L272 AbstractInterpreter]: Visited 204 different actions 204 times. Never merged. Never widened. Performed 381 root evaluator evaluations with a maximum evaluation depth of 14. Performed 381 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:09:47,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:47,306 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates