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/Problem03_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:52:25,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:52:25,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:52:25,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:52:25,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 17:52:25,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 17:52:25,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 17:52:25,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 17:52:25,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 17:52:25,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 17:52:25,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 17:52:25,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 17:52:25,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 17:52:25,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 17:52:25,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 17:52:25,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 17:52:25,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 17:52:25,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 17:52:25,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 17:52:25,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 17:52:25,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 17:52:25,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 17:52:25,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 17:52:25,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 17:52:25,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 17:52:25,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 17:52:25,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 17:52:25,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 17:52:25,476 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 17:52:25,492 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:52:25,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:52:25,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:52:25,493 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:52:25,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:52:25,494 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:52:25,494 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:52:25,494 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:52:25,494 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:52:25,494 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:52:25,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:52:25,495 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:52:25,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:52:25,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:52:25,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:52:25,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:52:25,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:52:25,496 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:52:25,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:52:25,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:52:25,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:52:25,497 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:52:25,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:52:25,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:52:25,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:52:25,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:52:25,498 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:52:25,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:52:25,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:52:25,499 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:52:25,527 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:52:25,540 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:52:25,543 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:52:25,545 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:52:25,545 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:52:25,546 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label30.c [2019-10-02 17:52:25,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fa8987fc/43965e2f79cf450481529710d70f2ff0/FLAG744a14a55 [2019-10-02 17:52:26,270 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:52:26,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label30.c [2019-10-02 17:52:26,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fa8987fc/43965e2f79cf450481529710d70f2ff0/FLAG744a14a55 [2019-10-02 17:52:26,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fa8987fc/43965e2f79cf450481529710d70f2ff0 [2019-10-02 17:52:26,437 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:52:26,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:52:26,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:52:26,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:52:26,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:52:26,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:52:26" (1/1) ... [2019-10-02 17:52:26,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba4e38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:26, skipping insertion in model container [2019-10-02 17:52:26,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:52:26" (1/1) ... [2019-10-02 17:52:26,457 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:52:26,558 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:52:27,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:52:27,423 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:52:27,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:52:27,820 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:52:27,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27 WrapperNode [2019-10-02 17:52:27,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:52:27,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:52:27,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:52:27,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:52:27,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27" (1/1) ... [2019-10-02 17:52:27,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27" (1/1) ... [2019-10-02 17:52:27,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27" (1/1) ... [2019-10-02 17:52:27,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27" (1/1) ... [2019-10-02 17:52:27,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27" (1/1) ... [2019-10-02 17:52:27,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27" (1/1) ... [2019-10-02 17:52:27,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27" (1/1) ... [2019-10-02 17:52:28,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:52:28,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:52:28,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:52:28,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:52:28,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27" (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 [2019-10-02 17:52:28,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:52:28,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:52:28,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:52:28,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:52:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:52:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:52:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:52:28,086 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:52:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:52:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:52:28,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:52:30,165 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:52:30,166 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:52:30,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:52:30 BoogieIcfgContainer [2019-10-02 17:52:30,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:52:30,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:52:30,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:52:30,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:52:30,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:52:26" (1/3) ... [2019-10-02 17:52:30,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5c312a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:52:30, skipping insertion in model container [2019-10-02 17:52:30,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:27" (2/3) ... [2019-10-02 17:52:30,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5c312a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:52:30, skipping insertion in model container [2019-10-02 17:52:30,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:52:30" (3/3) ... [2019-10-02 17:52:30,181 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label30.c [2019-10-02 17:52:30,195 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:52:30,209 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:52:30,231 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:52:30,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:52:30,276 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:52:30,276 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:52:30,276 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:52:30,276 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:52:30,276 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:52:30,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:52:30,277 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:52:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-02 17:52:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-02 17:52:30,357 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:30,359 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:30,362 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1701060184, now seen corresponding path program 1 times [2019-10-02 17:52:30,373 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:30,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:30,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:30,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:30,455 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:31,246 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 17:52:31,248 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:31,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:52:31,249 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:31,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:52:31,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:52:31,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:52:31,276 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-02 17:52:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:32,774 INFO L93 Difference]: Finished difference Result 530 states and 840 transitions. [2019-10-02 17:52:32,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:52:32,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-10-02 17:52:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:32,795 INFO L225 Difference]: With dead ends: 530 [2019-10-02 17:52:32,795 INFO L226 Difference]: Without dead ends: 462 [2019-10-02 17:52:32,797 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:52:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-10-02 17:52:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2019-10-02 17:52:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-10-02 17:52:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 739 transitions. [2019-10-02 17:52:32,882 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 739 transitions. Word has length 181 [2019-10-02 17:52:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:32,886 INFO L475 AbstractCegarLoop]: Abstraction has 460 states and 739 transitions. [2019-10-02 17:52:32,886 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:52:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 739 transitions. [2019-10-02 17:52:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-02 17:52:32,904 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:32,905 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:32,905 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash 902086427, now seen corresponding path program 1 times [2019-10-02 17:52:32,906 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:32,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:32,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:32,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:32,909 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:52:33,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:33,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:52:33,098 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:33,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:52:33,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:52:33,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:52:33,101 INFO L87 Difference]: Start difference. First operand 460 states and 739 transitions. Second operand 6 states. [2019-10-02 17:52:34,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:34,974 INFO L93 Difference]: Finished difference Result 937 states and 1533 transitions. [2019-10-02 17:52:34,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 17:52:34,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2019-10-02 17:52:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:34,984 INFO L225 Difference]: With dead ends: 937 [2019-10-02 17:52:34,984 INFO L226 Difference]: Without dead ends: 937 [2019-10-02 17:52:34,985 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 17:52:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-10-02 17:52:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 899. [2019-10-02 17:52:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-10-02 17:52:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1431 transitions. [2019-10-02 17:52:35,048 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1431 transitions. Word has length 190 [2019-10-02 17:52:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:35,048 INFO L475 AbstractCegarLoop]: Abstraction has 899 states and 1431 transitions. [2019-10-02 17:52:35,049 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:52:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1431 transitions. [2019-10-02 17:52:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-02 17:52:35,057 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:35,057 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:35,058 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash 73812076, now seen corresponding path program 1 times [2019-10-02 17:52:35,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:35,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:35,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:35,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:35,064 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:52:35,373 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:35,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:52:35,374 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:35,376 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:52:35,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:52:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:52:35,377 INFO L87 Difference]: Start difference. First operand 899 states and 1431 transitions. Second operand 3 states. [2019-10-02 17:52:36,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:36,533 INFO L93 Difference]: Finished difference Result 1742 states and 2663 transitions. [2019-10-02 17:52:36,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:52:36,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2019-10-02 17:52:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:36,545 INFO L225 Difference]: With dead ends: 1742 [2019-10-02 17:52:36,545 INFO L226 Difference]: Without dead ends: 1742 [2019-10-02 17:52:36,546 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:52:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2019-10-02 17:52:36,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1737. [2019-10-02 17:52:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2019-10-02 17:52:36,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2653 transitions. [2019-10-02 17:52:36,591 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2653 transitions. Word has length 193 [2019-10-02 17:52:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:36,592 INFO L475 AbstractCegarLoop]: Abstraction has 1737 states and 2653 transitions. [2019-10-02 17:52:36,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:52:36,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2653 transitions. [2019-10-02 17:52:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-02 17:52:36,602 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:36,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:36,603 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:36,603 INFO L82 PathProgramCache]: Analyzing trace with hash 975719227, now seen corresponding path program 1 times [2019-10-02 17:52:36,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:36,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:36,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:36,606 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:52:36,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:36,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:52:36,908 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:36,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:52:36,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:52:36,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:52:36,910 INFO L87 Difference]: Start difference. First operand 1737 states and 2653 transitions. Second operand 3 states. [2019-10-02 17:52:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:38,164 INFO L93 Difference]: Finished difference Result 3430 states and 5281 transitions. [2019-10-02 17:52:38,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:52:38,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2019-10-02 17:52:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:38,184 INFO L225 Difference]: With dead ends: 3430 [2019-10-02 17:52:38,185 INFO L226 Difference]: Without dead ends: 3430 [2019-10-02 17:52:38,185 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:52:38,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2019-10-02 17:52:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 3408. [2019-10-02 17:52:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3408 states. [2019-10-02 17:52:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 5237 transitions. [2019-10-02 17:52:38,284 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 5237 transitions. Word has length 213 [2019-10-02 17:52:38,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:38,285 INFO L475 AbstractCegarLoop]: Abstraction has 3408 states and 5237 transitions. [2019-10-02 17:52:38,285 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:52:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 5237 transitions. [2019-10-02 17:52:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-10-02 17:52:38,300 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:38,300 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:38,300 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1795381322, now seen corresponding path program 1 times [2019-10-02 17:52:38,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:38,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:38,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:38,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:38,303 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:52:38,502 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:38,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:52:38,502 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:38,503 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:52:38,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:52:38,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:52:38,504 INFO L87 Difference]: Start difference. First operand 3408 states and 5237 transitions. Second operand 6 states. [2019-10-02 17:52:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:39,890 INFO L93 Difference]: Finished difference Result 3485 states and 5232 transitions. [2019-10-02 17:52:39,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:52:39,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 239 [2019-10-02 17:52:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:39,917 INFO L225 Difference]: With dead ends: 3485 [2019-10-02 17:52:39,918 INFO L226 Difference]: Without dead ends: 3485 [2019-10-02 17:52:39,918 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 17:52:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2019-10-02 17:52:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 3442. [2019-10-02 17:52:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3442 states. [2019-10-02 17:52:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 5046 transitions. [2019-10-02 17:52:40,078 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 5046 transitions. Word has length 239 [2019-10-02 17:52:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:40,079 INFO L475 AbstractCegarLoop]: Abstraction has 3442 states and 5046 transitions. [2019-10-02 17:52:40,079 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:52:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 5046 transitions. [2019-10-02 17:52:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-10-02 17:52:40,091 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:40,091 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:40,092 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash 793399498, now seen corresponding path program 1 times [2019-10-02 17:52:40,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:40,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:40,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:40,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:40,097 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:52:40,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:52:40,402 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:52:40,403 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2019-10-02 17:52:40,405 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [917], [919], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-10-02 17:52:40,472 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:52:40,472 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)