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/Problem11_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:00:13,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:00:13,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:00:13,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 20:00:13,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 20:00:13,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 20:00:13,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 20:00:13,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 20:00:13,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 20:00:13,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 20:00:13,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 20:00:13,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 20:00:13,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 20:00:13,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 20:00:13,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 20:00:13,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 20:00:13,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 20:00:13,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 20:00:13,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 20:00:13,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 20:00:13,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 20:00:13,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 20:00:13,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 20:00:13,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 20:00:13,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 20:00:13,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 20:00:13,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 20:00:13,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 20:00:13,341 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 20:00:13,356 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:00:13,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:00:13,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:00:13,360 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:00:13,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:00:13,361 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:00:13,361 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:00:13,361 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:00:13,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:00:13,362 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:00:13,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:00:13,362 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:00:13,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:00:13,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:00:13,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:00:13,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:00:13,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:00:13,364 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:00:13,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:00:13,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:00:13,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:00:13,366 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:00:13,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:00:13,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:00:13,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:00:13,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:00:13,367 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:00:13,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:00:13,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:00:13,368 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:00:13,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:00:13,415 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:00:13,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:00:13,420 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:00:13,420 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:00:13,421 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-02 20:00:13,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8321b299/d44b1cf9783e4f9ba95de67565faee41/FLAG04f4f8218 [2019-10-02 20:00:14,021 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:00:14,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-02 20:00:14,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8321b299/d44b1cf9783e4f9ba95de67565faee41/FLAG04f4f8218 [2019-10-02 20:00:14,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8321b299/d44b1cf9783e4f9ba95de67565faee41 [2019-10-02 20:00:14,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:00:14,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:00:14,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:00:14,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:00:14,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:00:14,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:00:14" (1/1) ... [2019-10-02 20:00:14,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a08bfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:14, skipping insertion in model container [2019-10-02 20:00:14,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:00:14" (1/1) ... [2019-10-02 20:00:14,271 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:00:14,351 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:00:14,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:00:14,973 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:00:15,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:00:15,176 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:00:15,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15 WrapperNode [2019-10-02 20:00:15,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:00:15,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:00:15,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:00:15,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:00:15,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15" (1/1) ... [2019-10-02 20:00:15,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15" (1/1) ... [2019-10-02 20:00:15,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15" (1/1) ... [2019-10-02 20:00:15,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15" (1/1) ... [2019-10-02 20:00:15,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15" (1/1) ... [2019-10-02 20:00:15,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15" (1/1) ... [2019-10-02 20:00:15,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15" (1/1) ... [2019-10-02 20:00:15,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:00:15,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:00:15,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:00:15,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:00:15,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15" (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 20:00:15,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:00:15,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:00:15,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:00:15,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:00:15,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:00:15,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:00:15,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:00:15,396 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:00:15,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:00:15,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:00:15,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:00:17,110 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:00:17,111 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:00:17,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:00:17 BoogieIcfgContainer [2019-10-02 20:00:17,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:00:17,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:00:17,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:00:17,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:00:17,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:00:14" (1/3) ... [2019-10-02 20:00:17,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d263b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:00:17, skipping insertion in model container [2019-10-02 20:00:17,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:00:15" (2/3) ... [2019-10-02 20:00:17,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d263b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:00:17, skipping insertion in model container [2019-10-02 20:00:17,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:00:17" (3/3) ... [2019-10-02 20:00:17,124 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label55.c [2019-10-02 20:00:17,136 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:00:17,148 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:00:17,167 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:00:17,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:00:17,212 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:00:17,212 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:00:17,212 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:00:17,212 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:00:17,213 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:00:17,213 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:00:17,213 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:00:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 20:00:17,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-02 20:00:17,271 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:00:17,273 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, 1, 1, 1] [2019-10-02 20:00:17,275 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:00:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:00:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1587257066, now seen corresponding path program 1 times [2019-10-02 20:00:17,284 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:00:17,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:00:17,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:00:17,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:00:17,349 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:00:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:00:17,747 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 20:00:17,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:00:17,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:00:17,750 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:00:17,756 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:00:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:00:17,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:00:17,774 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-02 20:00:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:00:20,051 INFO L93 Difference]: Finished difference Result 689 states and 928 transitions. [2019-10-02 20:00:20,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:00:20,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-10-02 20:00:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:00:20,076 INFO L225 Difference]: With dead ends: 689 [2019-10-02 20:00:20,076 INFO L226 Difference]: Without dead ends: 616 [2019-10-02 20:00:20,078 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 20:00:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-02 20:00:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-10-02 20:00:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-10-02 20:00:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-10-02 20:00:20,161 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 51 [2019-10-02 20:00:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:00:20,162 INFO L475 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-10-02 20:00:20,162 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:00:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-10-02 20:00:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-02 20:00:20,168 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:00:20,169 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, 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 20:00:20,169 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:00:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:00:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1592222806, now seen corresponding path program 1 times [2019-10-02 20:00:20,170 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:00:20,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:00:20,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:00:20,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:00:20,172 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:00:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:00:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:00:20,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:00:20,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:00:20,457 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:00:20,459 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:00:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:00:20,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:00:20,460 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-10-02 20:00:22,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:00:22,112 INFO L93 Difference]: Finished difference Result 825 states and 1184 transitions. [2019-10-02 20:00:22,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:00:22,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-10-02 20:00:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:00:22,120 INFO L225 Difference]: With dead ends: 825 [2019-10-02 20:00:22,120 INFO L226 Difference]: Without dead ends: 825 [2019-10-02 20:00:22,122 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 20:00:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-10-02 20:00:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-10-02 20:00:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-02 20:00:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-10-02 20:00:22,205 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 123 [2019-10-02 20:00:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:00:22,206 INFO L475 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-10-02 20:00:22,206 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:00:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-10-02 20:00:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-02 20:00:22,209 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:00:22,210 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, 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] [2019-10-02 20:00:22,210 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:00:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:00:22,211 INFO L82 PathProgramCache]: Analyzing trace with hash -654834599, now seen corresponding path program 1 times [2019-10-02 20:00:22,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:00:22,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:00:22,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:00:22,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:00:22,213 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:00:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:00:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:00:22,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:00:22,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:00:22,385 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:00:22,385 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:00:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:00:22,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:00:22,386 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 4 states. [2019-10-02 20:00:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:00:24,149 INFO L93 Difference]: Finished difference Result 1598 states and 2238 transitions. [2019-10-02 20:00:24,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:00:24,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-02 20:00:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:00:24,168 INFO L225 Difference]: With dead ends: 1598 [2019-10-02 20:00:24,168 INFO L226 Difference]: Without dead ends: 1598 [2019-10-02 20:00:24,169 INFO L640 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 [2019-10-02 20:00:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2019-10-02 20:00:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1393. [2019-10-02 20:00:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1393 states. [2019-10-02 20:00:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1963 transitions. [2019-10-02 20:00:24,228 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1963 transitions. Word has length 124 [2019-10-02 20:00:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:00:24,229 INFO L475 AbstractCegarLoop]: Abstraction has 1393 states and 1963 transitions. [2019-10-02 20:00:24,229 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:00:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1963 transitions. [2019-10-02 20:00:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-02 20:00:24,234 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:00:24,234 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, 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] [2019-10-02 20:00:24,234 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:00:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:00:24,235 INFO L82 PathProgramCache]: Analyzing trace with hash 649342070, now seen corresponding path program 1 times [2019-10-02 20:00:24,235 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:00:24,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:00:24,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:00:24,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:00:24,237 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:00:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:00:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:00:24,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:00:24,547 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:00:24,549 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2019-10-02 20:00:24,551 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], [297], [305], [313], [317], [319], [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], [594], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 20:00:24,648 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:00:24,648 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:02:28,950 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:02:28,951 INFO L272 AbstractInterpreter]: Visited 98 different actions 98 times. Never merged. Never widened. Performed 245 root evaluator evaluations with a maximum evaluation depth of 17. Performed 245 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-10-02 20:02:28,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:02:28,955 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:04:09,514 INFO L227 lantSequenceWeakener]: Weakened 131 states. On average, predicates are now at 74.23% of their original sizes. [2019-10-02 20:04:09,515 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:04:09,598 INFO L420 sIntCurrentIteration]: We unified 144 AI predicates to 144 [2019-10-02 20:04:09,598 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:04:09,599 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:04:09,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-10-02 20:04:09,600 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:04:09,601 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:04:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:04:09,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:04:09,602 INFO L87 Difference]: Start difference. First operand 1393 states and 1963 transitions. Second operand 10 states.