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/Problem16_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:36:25,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:36:25,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:36:25,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:36:25,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 20:36:25,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 20:36:25,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 20:36:25,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 20:36:25,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 20:36:25,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 20:36:25,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 20:36:25,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 20:36:25,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 20:36:25,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 20:36:25,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 20:36:25,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 20:36:25,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 20:36:25,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:36:25,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:36:25,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:36:25,254 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 [2019-09-09 20:36:25,268 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:36:25,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:36:25,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:36:25,269 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:36:25,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:36:25,270 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:36:25,270 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:36:25,270 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:36:25,270 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:36:25,271 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:36:25,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:36:25,271 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:36:25,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:36:25,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:36:25,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:36:25,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:36:25,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:36:25,273 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:36:25,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:36:25,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:36:25,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:36:25,273 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:36:25,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:36:25,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:36:25,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:36:25,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:36:25,274 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:36:25,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:36:25,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:36:25,275 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:36:25,302 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:36:25,314 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:36:25,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:36:25,319 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:36:25,319 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:36:25,320 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-09-09 20:36:25,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513f927c9/5572951b0441403c8e127dbd8e59b4cf/FLAG71b897e77 [2019-09-09 20:36:26,001 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:36:26,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-09-09 20:36:26,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513f927c9/5572951b0441403c8e127dbd8e59b4cf/FLAG71b897e77 [2019-09-09 20:36:26,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513f927c9/5572951b0441403c8e127dbd8e59b4cf [2019-09-09 20:36:26,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:36:26,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:36:26,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:36:26,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:36:26,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:36:26,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:36:26" (1/1) ... [2019-09-09 20:36:26,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62cb8da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:26, skipping insertion in model container [2019-09-09 20:36:26,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:36:26" (1/1) ... [2019-09-09 20:36:26,218 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:36:26,287 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:36:27,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:36:27,162 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:36:27,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:36:27,458 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:36:27,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27 WrapperNode [2019-09-09 20:36:27,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:36:27,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:36:27,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:36:27,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:36:27,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27" (1/1) ... [2019-09-09 20:36:27,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27" (1/1) ... [2019-09-09 20:36:27,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27" (1/1) ... [2019-09-09 20:36:27,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27" (1/1) ... [2019-09-09 20:36:27,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27" (1/1) ... [2019-09-09 20:36:27,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27" (1/1) ... [2019-09-09 20:36:27,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27" (1/1) ... [2019-09-09 20:36:27,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:36:27,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:36:27,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:36:27,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:36:27,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27" (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 [2019-09-09 20:36:27,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:36:27,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:36:27,728 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:36:27,728 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:36:27,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:36:27,728 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:36:27,729 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:36:27,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:36:27,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:36:27,729 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:36:27,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:36:27,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:36:27,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:36:30,142 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:36:30,142 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:36:30,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:36:30 BoogieIcfgContainer [2019-09-09 20:36:30,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:36:30,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:36:30,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:36:30,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:36:30,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:36:26" (1/3) ... [2019-09-09 20:36:30,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2dc567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:36:30, skipping insertion in model container [2019-09-09 20:36:30,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:36:27" (2/3) ... [2019-09-09 20:36:30,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2dc567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:36:30, skipping insertion in model container [2019-09-09 20:36:30,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:36:30" (3/3) ... [2019-09-09 20:36:30,163 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label48.c [2019-09-09 20:36:30,174 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:36:30,183 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:36:30,201 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:36:30,228 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:36:30,228 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:36:30,228 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:36:30,229 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:36:30,229 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:36:30,229 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:36:30,229 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:36:30,229 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:36:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 20:36:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-09 20:36:30,288 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:36:30,289 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:36:30,292 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:36:30,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:36:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash -241070563, now seen corresponding path program 1 times [2019-09-09 20:36:30,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:36:30,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:36:30,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:36:30,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:36:30,351 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:36:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:36:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:36:30,692 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:36:30,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 20:36:30,692 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:36:30,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 20:36:30,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 20:36:30,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:36:30,718 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-09-09 20:36:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:36:33,290 INFO L93 Difference]: Finished difference Result 750 states and 1301 transitions. [2019-09-09 20:36:33,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 20:36:33,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2019-09-09 20:36:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:36:33,316 INFO L225 Difference]: With dead ends: 750 [2019-09-09 20:36:33,316 INFO L226 Difference]: Without dead ends: 682 [2019-09-09 20:36:33,327 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:36:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-09-09 20:36:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-09-09 20:36:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 20:36:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-09-09 20:36:33,421 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 70 [2019-09-09 20:36:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:36:33,422 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-09-09 20:36:33,422 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 20:36:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-09-09 20:36:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 20:36:33,429 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:36:33,429 INFO L399 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, 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] [2019-09-09 20:36:33,430 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:36:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:36:33,430 INFO L82 PathProgramCache]: Analyzing trace with hash -712380051, now seen corresponding path program 1 times [2019-09-09 20:36:33,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:36:33,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:36:33,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:36:33,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:36:33,432 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:36:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:36:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:36:33,620 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:36:33,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 20:36:33,620 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:36:33,622 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 20:36:33,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 20:36:33,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 20:36:33,623 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-09-09 20:36:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:36:37,177 INFO L93 Difference]: Finished difference Result 1385 states and 2136 transitions. [2019-09-09 20:36:37,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:36:37,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-09-09 20:36:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:36:37,195 INFO L225 Difference]: With dead ends: 1385 [2019-09-09 20:36:37,195 INFO L226 Difference]: Without dead ends: 1385 [2019-09-09 20:36:37,196 INFO L628 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 [2019-09-09 20:36:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2019-09-09 20:36:37,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1377. [2019-09-09 20:36:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1377 states. [2019-09-09 20:36:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 2120 transitions. [2019-09-09 20:36:37,281 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 2120 transitions. Word has length 141 [2019-09-09 20:36:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:36:37,282 INFO L475 AbstractCegarLoop]: Abstraction has 1377 states and 2120 transitions. [2019-09-09 20:36:37,282 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 20:36:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 2120 transitions. [2019-09-09 20:36:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-09 20:36:37,286 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:36:37,287 INFO L399 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, 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] [2019-09-09 20:36:37,287 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:36:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:36:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash -258818048, now seen corresponding path program 1 times [2019-09-09 20:36:37,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:36:37,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:36:37,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:36:37,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:36:37,289 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:36:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:36:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 20:36:37,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:36:37,460 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:36:37,461 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 171 with the following transitions: [2019-09-09 20:36:37,463 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [587], [595], [603], [611], [619], [627], [635], [643], [647], [649], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 20:36:37,541 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:36:37,542 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:36:42,944 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:36:42,946 INFO L272 AbstractInterpreter]: Visited 104 different actions 104 times. Never merged. Never widened. Performed 247 root evaluator evaluations with a maximum evaluation depth of 14. Performed 247 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 20:36:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:36:42,951 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:36:46,572 INFO L227 lantSequenceWeakener]: Weakened 156 states. On average, predicates are now at 78.98% of their original sizes. [2019-09-09 20:36:46,573 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:36:46,649 INFO L420 sIntCurrentIteration]: We unified 169 AI predicates to 169 [2019-09-09 20:36:46,650 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:36:46,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:36:46,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [4] total 13 [2019-09-09 20:36:46,651 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:36:46,652 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 20:36:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 20:36:46,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 20:36:46,652 INFO L87 Difference]: Start difference. First operand 1377 states and 2120 transitions. Second operand 11 states. [2019-09-09 20:37:05,986 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.