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/Problem17_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:55:11,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:55:11,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:55:11,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:55:11,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 20:55:11,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 20:55:11,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 20:55:11,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 20:55:11,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 20:55:11,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 20:55:11,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 20:55:11,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 20:55:11,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 20:55:11,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 20:55:11,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 20:55:11,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 20:55:11,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 20:55:11,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:55:11,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:55:11,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:55:11,333 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 20:55:11,347 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:55:11,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:55:11,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:55:11,348 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:55:11,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:55:11,349 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:55:11,349 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:55:11,349 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:55:11,349 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:55:11,350 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:55:11,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:55:11,350 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:55:11,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:55:11,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:55:11,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:55:11,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:55:11,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:55:11,352 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:55:11,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:55:11,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:55:11,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:55:11,352 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:55:11,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:55:11,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:55:11,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:55:11,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:55:11,353 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:55:11,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:55:11,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:55:11,354 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:55:11,387 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:55:11,403 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:55:11,408 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:55:11,409 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:55:11,409 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:55:11,410 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label08.c [2019-09-09 20:55:11,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1fcb73e/96ccfd94882d445b8d8278efd900a50e/FLAG3d288fcf2 [2019-09-09 20:55:12,161 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:55:12,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label08.c [2019-09-09 20:55:12,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1fcb73e/96ccfd94882d445b8d8278efd900a50e/FLAG3d288fcf2 [2019-09-09 20:55:12,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1fcb73e/96ccfd94882d445b8d8278efd900a50e [2019-09-09 20:55:12,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:55:12,351 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:55:12,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:55:12,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:55:12,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:55:12,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:55:12" (1/1) ... [2019-09-09 20:55:12,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d522d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:12, skipping insertion in model container [2019-09-09 20:55:12,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:55:12" (1/1) ... [2019-09-09 20:55:12,366 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:55:12,458 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:55:13,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:55:13,508 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:55:13,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:55:13,978 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:55:13,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13 WrapperNode [2019-09-09 20:55:13,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:55:13,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:55:13,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:55:13,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:55:13,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13" (1/1) ... [2019-09-09 20:55:13,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13" (1/1) ... [2019-09-09 20:55:14,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13" (1/1) ... [2019-09-09 20:55:14,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13" (1/1) ... [2019-09-09 20:55:14,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13" (1/1) ... [2019-09-09 20:55:14,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13" (1/1) ... [2019-09-09 20:55:14,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13" (1/1) ... [2019-09-09 20:55:14,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:55:14,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:55:14,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:55:14,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:55:14,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13" (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 20:55:14,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:55:14,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:55:14,370 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:55:14,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:55:14,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:55:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:55:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:55:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:55:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:55:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:55:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:55:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:55:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:55:18,374 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:55:18,375 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:55:18,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:55:18 BoogieIcfgContainer [2019-09-09 20:55:18,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:55:18,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:55:18,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:55:18,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:55:18,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:55:12" (1/3) ... [2019-09-09 20:55:18,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a475298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:55:18, skipping insertion in model container [2019-09-09 20:55:18,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:55:13" (2/3) ... [2019-09-09 20:55:18,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a475298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:55:18, skipping insertion in model container [2019-09-09 20:55:18,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:55:18" (3/3) ... [2019-09-09 20:55:18,393 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label08.c [2019-09-09 20:55:18,406 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:55:18,416 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:55:18,433 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:55:18,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:55:18,461 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:55:18,461 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:55:18,462 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:55:18,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:55:18,462 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:55:18,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:55:18,462 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:55:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 20:55:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-09 20:55:18,520 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:55:18,521 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] [2019-09-09 20:55:18,523 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:55:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:55:18,529 INFO L82 PathProgramCache]: Analyzing trace with hash 768674241, now seen corresponding path program 1 times [2019-09-09 20:55:18,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:55:18,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:55:18,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:55:18,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:55:18,582 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:55:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:55:18,926 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 20:55:18,928 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:55:18,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:55:18,928 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:55:18,934 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:55:18,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:55:18,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:55:18,952 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 20:55:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:55:25,613 INFO L93 Difference]: Finished difference Result 1538 states and 2353 transitions. [2019-09-09 20:55:25,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:55:25,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-09-09 20:55:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:55:25,657 INFO L225 Difference]: With dead ends: 1538 [2019-09-09 20:55:25,657 INFO L226 Difference]: Without dead ends: 1453 [2019-09-09 20:55:25,660 INFO L628 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 [2019-09-09 20:55:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2019-09-09 20:55:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1451. [2019-09-09 20:55:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1451 states. [2019-09-09 20:55:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 2219 transitions. [2019-09-09 20:55:25,847 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 2219 transitions. Word has length 64 [2019-09-09 20:55:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:55:25,847 INFO L475 AbstractCegarLoop]: Abstraction has 1451 states and 2219 transitions. [2019-09-09 20:55:25,848 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:55:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 2219 transitions. [2019-09-09 20:55:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-09 20:55:25,863 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:55:25,863 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, 1, 1, 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 20:55:25,863 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:55:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:55:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash -149082696, now seen corresponding path program 1 times [2019-09-09 20:55:25,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:55:25,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:55:25,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:55:25,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:55:25,867 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:55:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:55:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:55:26,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:55:26,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:55:26,113 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:55:26,117 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:55:26,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:55:26,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:55:26,118 INFO L87 Difference]: Start difference. First operand 1451 states and 2219 transitions. Second operand 4 states. [2019-09-09 20:55:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:55:34,370 INFO L93 Difference]: Finished difference Result 4069 states and 5647 transitions. [2019-09-09 20:55:34,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:55:34,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-09-09 20:55:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:55:34,399 INFO L225 Difference]: With dead ends: 4069 [2019-09-09 20:55:34,399 INFO L226 Difference]: Without dead ends: 4069 [2019-09-09 20:55:34,400 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:55:34,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4069 states. [2019-09-09 20:55:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4069 to 4065. [2019-09-09 20:55:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4065 states. [2019-09-09 20:55:34,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 5639 transitions. [2019-09-09 20:55:34,509 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 5639 transitions. Word has length 138 [2019-09-09 20:55:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:55:34,510 INFO L475 AbstractCegarLoop]: Abstraction has 4065 states and 5639 transitions. [2019-09-09 20:55:34,510 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:55:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 5639 transitions. [2019-09-09 20:55:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-09 20:55:34,515 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:55:34,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:55:34,516 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:55:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:55:34,516 INFO L82 PathProgramCache]: Analyzing trace with hash -89718515, now seen corresponding path program 1 times [2019-09-09 20:55:34,516 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:55:34,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:55:34,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:55:34,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:55:34,518 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:55:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:55:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:55:34,756 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:55:34,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:55:34,757 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:55:34,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:55:34,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:55:34,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:55:34,758 INFO L87 Difference]: Start difference. First operand 4065 states and 5639 transitions. Second operand 6 states. [2019-09-09 20:55:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:55:40,812 INFO L93 Difference]: Finished difference Result 8169 states and 11228 transitions. [2019-09-09 20:55:40,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:55:40,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 179 [2019-09-09 20:55:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:55:40,863 INFO L225 Difference]: With dead ends: 8169 [2019-09-09 20:55:40,864 INFO L226 Difference]: Without dead ends: 8169 [2019-09-09 20:55:40,867 INFO L628 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 [2019-09-09 20:55:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2019-09-09 20:55:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 8116. [2019-09-09 20:55:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8116 states. [2019-09-09 20:55:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8116 states to 8116 states and 10889 transitions. [2019-09-09 20:55:41,134 INFO L78 Accepts]: Start accepts. Automaton has 8116 states and 10889 transitions. Word has length 179 [2019-09-09 20:55:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:55:41,136 INFO L475 AbstractCegarLoop]: Abstraction has 8116 states and 10889 transitions. [2019-09-09 20:55:41,136 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:55:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 8116 states and 10889 transitions. [2019-09-09 20:55:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-09-09 20:55:41,145 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:55:41,145 INFO L399 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:55:41,145 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:55:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:55:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1079205980, now seen corresponding path program 1 times [2019-09-09 20:55:41,146 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:55:41,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:55:41,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:55:41,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:55:41,147 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:55:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:55:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 115 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-09 20:55:41,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:55:41,427 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:55:41,428 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 231 with the following transitions: [2019-09-09 20:55:41,430 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1130], [1132], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1302], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 20:55:41,483 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:55:41,483 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:55:44,825 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 20:55:50,633 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:55:50,635 INFO L272 AbstractInterpreter]: Visited 100 different actions 195 times. Merged at 4 different actions 5 times. Never widened. Performed 425 root evaluator evaluations with a maximum evaluation depth of 15. Performed 425 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 20:55:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:55:50,638 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:55:54,419 INFO L227 lantSequenceWeakener]: Weakened 227 states. On average, predicates are now at 75.78% of their original sizes. [2019-09-09 20:55:54,420 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:55:54,533 INFO L420 sIntCurrentIteration]: We unified 229 AI predicates to 229 [2019-09-09 20:55:54,533 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:55:54,534 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:55:54,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 20:55:54,534 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:55:54,535 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 20:55:54,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 20:55:54,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 20:55:54,537 INFO L87 Difference]: Start difference. First operand 8116 states and 10889 transitions. Second operand 12 states.