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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:18:23,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:18:23,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:18:23,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:18:23,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 19:18:23,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 19:18:23,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 19:18:23,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 19:18:23,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 19:18:23,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 19:18:23,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 19:18:23,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 19:18:23,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 19:18:23,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 19:18:23,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 19:18:23,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 19:18:23,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 19:18:23,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 19:18:23,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 19:18:23,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 19:18:23,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 19:18:23,080 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:18:23,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:18:23,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:18:23,080 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:18:23,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:18:23,081 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:18:23,082 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:18:23,082 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:18:23,082 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:18:23,082 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:18:23,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:18:23,083 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:18:23,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:18:23,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:18:23,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:18:23,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:18:23,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:18:23,084 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:18:23,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:18:23,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:18:23,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:18:23,085 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:18:23,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:18:23,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:18:23,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:18:23,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:18:23,086 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:18:23,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:18:23,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:18:23,087 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:18:23,115 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:18:23,127 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:18:23,131 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:18:23,132 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:18:23,132 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:18:23,133 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label53.c [2019-10-02 19:18:23,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec6eea1d8/cff1559e993249b1a81a2d144537a4d5/FLAGfb5b93452 [2019-10-02 19:18:23,749 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:18:23,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label53.c [2019-10-02 19:18:23,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec6eea1d8/cff1559e993249b1a81a2d144537a4d5/FLAGfb5b93452 [2019-10-02 19:18:24,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec6eea1d8/cff1559e993249b1a81a2d144537a4d5 [2019-10-02 19:18:24,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:18:24,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:18:24,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:18:24,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:18:24,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:18:24,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:18:24" (1/1) ... [2019-10-02 19:18:24,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d63343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24, skipping insertion in model container [2019-10-02 19:18:24,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:18:24" (1/1) ... [2019-10-02 19:18:24,058 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:18:24,115 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:18:24,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:18:24,644 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:18:24,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:18:24,802 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:18:24,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24 WrapperNode [2019-10-02 19:18:24,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:18:24,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:18:24,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:18:24,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:18:24,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24" (1/1) ... [2019-10-02 19:18:24,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24" (1/1) ... [2019-10-02 19:18:24,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24" (1/1) ... [2019-10-02 19:18:24,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24" (1/1) ... [2019-10-02 19:18:24,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24" (1/1) ... [2019-10-02 19:18:24,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24" (1/1) ... [2019-10-02 19:18:24,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24" (1/1) ... [2019-10-02 19:18:24,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:18:24,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:18:24,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:18:24,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:18:24,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24" (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 [2019-10-02 19:18:24,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:18:24,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:18:24,983 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:18:24,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:18:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:18:24,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:18:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:18:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:18:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:18:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:18:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:18:26,202 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:18:26,203 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:18:26,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:18:26 BoogieIcfgContainer [2019-10-02 19:18:26,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:18:26,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:18:26,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:18:26,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:18:26,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:18:24" (1/3) ... [2019-10-02 19:18:26,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5394c36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:18:26, skipping insertion in model container [2019-10-02 19:18:26,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:18:24" (2/3) ... [2019-10-02 19:18:26,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5394c36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:18:26, skipping insertion in model container [2019-10-02 19:18:26,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:18:26" (3/3) ... [2019-10-02 19:18:26,212 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label53.c [2019-10-02 19:18:26,222 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:18:26,230 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:18:26,247 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:18:26,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:18:26,275 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:18:26,275 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:18:26,275 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:18:26,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:18:26,276 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:18:26,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:18:26,276 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:18:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 19:18:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-02 19:18:26,310 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:18:26,311 INFO L411 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] [2019-10-02 19:18:26,312 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:18:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:18:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash 253834415, now seen corresponding path program 1 times [2019-10-02 19:18:26,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:18:26,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:18:26,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:18:26,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:18:26,364 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:18:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:18:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:18:26,584 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:18:26,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:18:26,585 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:18:26,590 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:18:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:18:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:18:26,608 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-02 19:18:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:18:28,085 INFO L93 Difference]: Finished difference Result 524 states and 762 transitions. [2019-10-02 19:18:28,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:18:28,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-10-02 19:18:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:18:28,107 INFO L225 Difference]: With dead ends: 524 [2019-10-02 19:18:28,107 INFO L226 Difference]: Without dead ends: 437 [2019-10-02 19:18:28,109 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:18:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-02 19:18:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-10-02 19:18:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 19:18:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 426 transitions. [2019-10-02 19:18:28,199 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 426 transitions. Word has length 48 [2019-10-02 19:18:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:18:28,200 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 426 transitions. [2019-10-02 19:18:28,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:18:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 426 transitions. [2019-10-02 19:18:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-02 19:18:28,206 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:18:28,207 INFO L411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:18:28,207 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:18:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:18:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash -384487862, now seen corresponding path program 1 times [2019-10-02 19:18:28,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:18:28,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:18:28,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:18:28,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:18:28,210 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:18:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:18:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:18:28,451 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:18:28,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:18:28,452 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:18:28,454 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:18:28,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:18:28,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:18:28,456 INFO L87 Difference]: Start difference. First operand 294 states and 426 transitions. Second operand 6 states. [2019-10-02 19:18:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:18:29,440 INFO L93 Difference]: Finished difference Result 602 states and 885 transitions. [2019-10-02 19:18:29,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:18:29,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-02 19:18:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:18:29,446 INFO L225 Difference]: With dead ends: 602 [2019-10-02 19:18:29,446 INFO L226 Difference]: Without dead ends: 602 [2019-10-02 19:18:29,447 INFO L640 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 [2019-10-02 19:18:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-10-02 19:18:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2019-10-02 19:18:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-10-02 19:18:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 855 transitions. [2019-10-02 19:18:29,530 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 855 transitions. Word has length 122 [2019-10-02 19:18:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:18:29,531 INFO L475 AbstractCegarLoop]: Abstraction has 590 states and 855 transitions. [2019-10-02 19:18:29,531 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:18:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 855 transitions. [2019-10-02 19:18:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-02 19:18:29,539 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:18:29,539 INFO L411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:18:29,539 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:18:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:18:29,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1716579338, now seen corresponding path program 1 times [2019-10-02 19:18:29,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:18:29,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:18:29,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:18:29,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:18:29,542 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:18:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:18:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 19:18:29,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:18:29,753 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:18:29,754 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 155 with the following transitions: [2019-10-02 19:18:29,757 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:18:29,828 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:18:29,828 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:18:53,133 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:18:53,135 INFO L272 AbstractInterpreter]: Visited 110 different actions 110 times. Never merged. Never widened. Performed 147 root evaluator evaluations with a maximum evaluation depth of 16. Performed 147 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 19:18:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:18:53,139 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:19:10,396 INFO L227 lantSequenceWeakener]: Weakened 148 states. On average, predicates are now at 73.45% of their original sizes. [2019-10-02 19:19:10,396 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:19:10,421 INFO L420 sIntCurrentIteration]: We unified 153 AI predicates to 153 [2019-10-02 19:19:10,422 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:19:10,423 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:19:10,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-10-02 19:19:10,423 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:19:10,424 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 19:19:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 19:19:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 19:19:10,424 INFO L87 Difference]: Start difference. First operand 590 states and 855 transitions. Second operand 7 states. [2019-10-02 19:19:16,670 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:22:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:22:39,150 INFO L93 Difference]: Finished difference Result 734 states and 1006 transitions. [2019-10-02 19:22:39,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:22:39,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2019-10-02 19:22:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:22:39,158 INFO L225 Difference]: With dead ends: 734 [2019-10-02 19:22:39,158 INFO L226 Difference]: Without dead ends: 734 [2019-10-02 19:22:39,159 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-02 19:22:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-10-02 19:22:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 733. [2019-10-02 19:22:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2019-10-02 19:22:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1005 transitions. [2019-10-02 19:22:39,190 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1005 transitions. Word has length 154 [2019-10-02 19:22:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:22:39,193 INFO L475 AbstractCegarLoop]: Abstraction has 733 states and 1005 transitions. [2019-10-02 19:22:39,193 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 19:22:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1005 transitions. [2019-10-02 19:22:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-02 19:22:39,201 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:22:39,201 INFO L411 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, 2, 2, 2, 2, 2, 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] [2019-10-02 19:22:39,202 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:22:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:22:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1678670381, now seen corresponding path program 1 times [2019-10-02 19:22:39,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:22:39,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:22:39,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:22:39,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:22:39,205 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:22:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:22:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-02 19:22:39,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:22:39,503 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:22:39,503 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2019-10-02 19:22:39,504 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:22:39,510 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:22:39,510 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:22:42,100 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:23:46,685 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:23:46,686 INFO L272 AbstractInterpreter]: Visited 114 different actions 222 times. Merged at 4 different actions 4 times. Never widened. Performed 437 root evaluator evaluations with a maximum evaluation depth of 16. Performed 437 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:23:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:23:46,686 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:24:27,906 INFO L227 lantSequenceWeakener]: Weakened 221 states. On average, predicates are now at 73.27% of their original sizes. [2019-10-02 19:24:27,906 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:24:28,012 INFO L420 sIntCurrentIteration]: We unified 223 AI predicates to 223 [2019-10-02 19:24:28,012 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:24:28,012 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:24:28,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [4] total 13 [2019-10-02 19:24:28,013 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:24:28,013 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 19:24:28,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 19:24:28,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-02 19:24:28,014 INFO L87 Difference]: Start difference. First operand 733 states and 1005 transitions. Second operand 11 states. [2019-10-02 19:30:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:30:46,867 INFO L93 Difference]: Finished difference Result 880 states and 1164 transitions. [2019-10-02 19:30:46,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 19:30:46,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 224 [2019-10-02 19:30:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:30:46,874 INFO L225 Difference]: With dead ends: 880 [2019-10-02 19:30:46,874 INFO L226 Difference]: Without dead ends: 880 [2019-10-02 19:30:46,875 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-10-02 19:30:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-10-02 19:30:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 878. [2019-10-02 19:30:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2019-10-02 19:30:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1162 transitions. [2019-10-02 19:30:46,899 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1162 transitions. Word has length 224 [2019-10-02 19:30:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:30:46,900 INFO L475 AbstractCegarLoop]: Abstraction has 878 states and 1162 transitions. [2019-10-02 19:30:46,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 19:30:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1162 transitions. [2019-10-02 19:30:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-10-02 19:30:46,904 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:30:46,905 INFO L411 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 19:30:46,905 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:30:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:30:46,906 INFO L82 PathProgramCache]: Analyzing trace with hash 259042280, now seen corresponding path program 1 times [2019-10-02 19:30:46,906 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:30:46,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:30:46,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:30:46,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:30:46,908 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:30:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:30:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 83 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 19:30:47,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:30:47,169 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:30:47,170 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2019-10-02 19:30:47,170 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:30:47,174 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:30:47,174 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:30:57,749 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:31:32,922 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:31:32,923 INFO L272 AbstractInterpreter]: Visited 114 different actions 221 times. Merged at 3 different actions 3 times. Never widened. Performed 355 root evaluator evaluations with a maximum evaluation depth of 16. Performed 355 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:31:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:31:32,923 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:32:01,086 INFO L227 lantSequenceWeakener]: Weakened 230 states. On average, predicates are now at 73.25% of their original sizes. [2019-10-02 19:32:01,086 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:32:01,173 INFO L420 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2019-10-02 19:32:01,173 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:32:01,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:32:01,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 19:32:01,174 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:32:01,175 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 19:32:01,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 19:32:01,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 19:32:01,175 INFO L87 Difference]: Start difference. First operand 878 states and 1162 transitions. Second operand 11 states.