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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:52:07,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:52:07,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:52:07,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:52:07,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 17:52:07,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 17:52:07,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 17:52:07,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 17:52:07,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 17:52:07,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 17:52:07,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 17:52:07,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 17:52:08,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 17:52:08,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 17:52:08,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 17:52:08,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 17:52:08,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 17:52:08,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 17:52:08,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 17:52:08,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 17:52:08,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 17:52:08,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 17:52:08,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 17:52:08,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 17:52:08,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 17:52:08,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 17:52:08,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 17:52:08,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 17:52:08,027 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 17:52:08,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:52:08,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:52:08,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:52:08,052 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:52:08,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:52:08,053 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:52:08,053 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:52:08,053 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:52:08,054 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:52:08,054 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:52:08,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:52:08,056 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:52:08,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:52:08,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:52:08,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:52:08,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:52:08,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:52:08,057 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:52:08,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:52:08,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:52:08,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:52:08,058 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:52:08,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:52:08,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:52:08,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:52:08,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:52:08,059 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:52:08,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:52:08,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:52:08,060 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:52:08,099 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:52:08,110 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:52:08,114 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:52:08,115 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:52:08,115 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:52:08,116 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-10-02 17:52:08,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2babe3d2b/8beb653ec1b440849e767e046c0b8e33/FLAG58c630eb2 [2019-10-02 17:52:08,863 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:52:08,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-10-02 17:52:08,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2babe3d2b/8beb653ec1b440849e767e046c0b8e33/FLAG58c630eb2 [2019-10-02 17:52:09,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2babe3d2b/8beb653ec1b440849e767e046c0b8e33 [2019-10-02 17:52:09,027 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:52:09,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:52:09,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:52:09,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:52:09,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:52:09,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:52:09" (1/1) ... [2019-10-02 17:52:09,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c82782f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:09, skipping insertion in model container [2019-10-02 17:52:09,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:52:09" (1/1) ... [2019-10-02 17:52:09,045 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:52:09,124 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:52:09,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:52:09,871 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:52:10,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:52:10,120 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:52:10,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10 WrapperNode [2019-10-02 17:52:10,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:52:10,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:52:10,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:52:10,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:52:10,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10" (1/1) ... [2019-10-02 17:52:10,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10" (1/1) ... [2019-10-02 17:52:10,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10" (1/1) ... [2019-10-02 17:52:10,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10" (1/1) ... [2019-10-02 17:52:10,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10" (1/1) ... [2019-10-02 17:52:10,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10" (1/1) ... [2019-10-02 17:52:10,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10" (1/1) ... [2019-10-02 17:52:10,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:52:10,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:52:10,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:52:10,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:52:10,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10" (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 17:52:10,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:52:10,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:52:10,366 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:52:10,366 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:52:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:52:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:52:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:52:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:52:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:52:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:52:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:52:12,297 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:52:12,298 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:52:12,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:52:12 BoogieIcfgContainer [2019-10-02 17:52:12,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:52:12,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:52:12,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:52:12,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:52:12,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:52:09" (1/3) ... [2019-10-02 17:52:12,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2eeca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:52:12, skipping insertion in model container [2019-10-02 17:52:12,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:52:10" (2/3) ... [2019-10-02 17:52:12,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2eeca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:52:12, skipping insertion in model container [2019-10-02 17:52:12,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:52:12" (3/3) ... [2019-10-02 17:52:12,311 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label27.c [2019-10-02 17:52:12,322 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:52:12,334 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:52:12,352 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:52:12,389 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:52:12,390 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:52:12,390 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:52:12,391 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:52:12,391 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:52:12,391 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:52:12,391 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:52:12,391 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:52:12,431 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-02 17:52:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-02 17:52:12,459 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:12,461 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] [2019-10-02 17:52:12,463 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:12,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1303003168, now seen corresponding path program 1 times [2019-10-02 17:52:12,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:12,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:12,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:12,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:12,533 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:13,316 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 17:52:13,318 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:13,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:52:13,319 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:13,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:52:13,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:52:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:52:13,345 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-02 17:52:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:14,695 INFO L93 Difference]: Finished difference Result 547 states and 875 transitions. [2019-10-02 17:52:14,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:52:14,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2019-10-02 17:52:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:14,719 INFO L225 Difference]: With dead ends: 547 [2019-10-02 17:52:14,720 INFO L226 Difference]: Without dead ends: 479 [2019-10-02 17:52:14,721 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 17:52:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2019-10-02 17:52:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 465. [2019-10-02 17:52:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-10-02 17:52:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 749 transitions. [2019-10-02 17:52:14,804 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 749 transitions. Word has length 159 [2019-10-02 17:52:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:14,806 INFO L475 AbstractCegarLoop]: Abstraction has 465 states and 749 transitions. [2019-10-02 17:52:14,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:52:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 749 transitions. [2019-10-02 17:52:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-02 17:52:14,813 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:14,813 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] [2019-10-02 17:52:14,814 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash 436458787, now seen corresponding path program 1 times [2019-10-02 17:52:14,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:14,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:14,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:14,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:14,822 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:15,016 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 17:52:15,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:15,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:52:15,017 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:15,020 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:52:15,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:52:15,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:52:15,021 INFO L87 Difference]: Start difference. First operand 465 states and 749 transitions. Second operand 6 states. [2019-10-02 17:52:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:16,822 INFO L93 Difference]: Finished difference Result 941 states and 1549 transitions. [2019-10-02 17:52:16,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 17:52:16,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2019-10-02 17:52:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:16,835 INFO L225 Difference]: With dead ends: 941 [2019-10-02 17:52:16,836 INFO L226 Difference]: Without dead ends: 941 [2019-10-02 17:52:16,837 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 17:52:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2019-10-02 17:52:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 900. [2019-10-02 17:52:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2019-10-02 17:52:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1440 transitions. [2019-10-02 17:52:16,910 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1440 transitions. Word has length 168 [2019-10-02 17:52:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:16,910 INFO L475 AbstractCegarLoop]: Abstraction has 900 states and 1440 transitions. [2019-10-02 17:52:16,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:52:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1440 transitions. [2019-10-02 17:52:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-02 17:52:16,919 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:16,919 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 17:52:16,919 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:16,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1302221225, now seen corresponding path program 1 times [2019-10-02 17:52:16,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:16,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:16,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:16,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:16,925 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:52:17,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:17,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 17:52:17,053 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:17,055 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 17:52:17,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 17:52:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 17:52:17,056 INFO L87 Difference]: Start difference. First operand 900 states and 1440 transitions. Second operand 5 states. [2019-10-02 17:52:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:18,693 INFO L93 Difference]: Finished difference Result 1796 states and 2838 transitions. [2019-10-02 17:52:18,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:52:18,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2019-10-02 17:52:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:18,710 INFO L225 Difference]: With dead ends: 1796 [2019-10-02 17:52:18,710 INFO L226 Difference]: Without dead ends: 1796 [2019-10-02 17:52:18,711 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 17:52:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2019-10-02 17:52:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1763. [2019-10-02 17:52:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2019-10-02 17:52:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2724 transitions. [2019-10-02 17:52:18,785 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2724 transitions. Word has length 169 [2019-10-02 17:52:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:18,785 INFO L475 AbstractCegarLoop]: Abstraction has 1763 states and 2724 transitions. [2019-10-02 17:52:18,785 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 17:52:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2724 transitions. [2019-10-02 17:52:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-02 17:52:18,797 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:18,798 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] [2019-10-02 17:52:18,798 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:18,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1015492916, now seen corresponding path program 1 times [2019-10-02 17:52:18,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:18,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:18,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:18,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:18,805 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:19,010 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 17:52:19,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:19,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:52:19,011 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:19,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:52:19,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:52:19,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:52:19,013 INFO L87 Difference]: Start difference. First operand 1763 states and 2724 transitions. Second operand 3 states. [2019-10-02 17:52:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:20,119 INFO L93 Difference]: Finished difference Result 3249 states and 4940 transitions. [2019-10-02 17:52:20,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:52:20,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-10-02 17:52:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:20,142 INFO L225 Difference]: With dead ends: 3249 [2019-10-02 17:52:20,142 INFO L226 Difference]: Without dead ends: 3249 [2019-10-02 17:52:20,143 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 17:52:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2019-10-02 17:52:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 3246. [2019-10-02 17:52:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3246 states. [2019-10-02 17:52:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4935 transitions. [2019-10-02 17:52:20,245 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4935 transitions. Word has length 171 [2019-10-02 17:52:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:20,246 INFO L475 AbstractCegarLoop]: Abstraction has 3246 states and 4935 transitions. [2019-10-02 17:52:20,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:52:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4935 transitions. [2019-10-02 17:52:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-02 17:52:20,256 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:20,257 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 17:52:20,257 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1082780184, now seen corresponding path program 1 times [2019-10-02 17:52:20,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:20,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:20,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:20,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:20,259 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:52:20,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:20,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:52:20,495 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:20,496 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:52:20,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:52:20,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:52:20,497 INFO L87 Difference]: Start difference. First operand 3246 states and 4935 transitions. Second operand 3 states. [2019-10-02 17:52:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:21,592 INFO L93 Difference]: Finished difference Result 6202 states and 9383 transitions. [2019-10-02 17:52:21,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:52:21,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-10-02 17:52:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:21,632 INFO L225 Difference]: With dead ends: 6202 [2019-10-02 17:52:21,633 INFO L226 Difference]: Without dead ends: 6202 [2019-10-02 17:52:21,633 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 17:52:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6202 states. [2019-10-02 17:52:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6202 to 6194. [2019-10-02 17:52:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6194 states. [2019-10-02 17:52:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 9368 transitions. [2019-10-02 17:52:21,824 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 9368 transitions. Word has length 173 [2019-10-02 17:52:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:21,825 INFO L475 AbstractCegarLoop]: Abstraction has 6194 states and 9368 transitions. [2019-10-02 17:52:21,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:52:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 9368 transitions. [2019-10-02 17:52:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-02 17:52:21,845 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:21,845 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 17:52:21,846 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:21,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1343685801, now seen corresponding path program 1 times [2019-10-02 17:52:21,846 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:21,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:21,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:21,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:21,848 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:52:21,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:52:21,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:52:21,956 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:52:21,957 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:52:21,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:52:21,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:52:21,958 INFO L87 Difference]: Start difference. First operand 6194 states and 9368 transitions. Second operand 6 states. [2019-10-02 17:52:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:52:23,499 INFO L93 Difference]: Finished difference Result 6377 states and 9611 transitions. [2019-10-02 17:52:23,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:52:23,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 178 [2019-10-02 17:52:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:52:23,536 INFO L225 Difference]: With dead ends: 6377 [2019-10-02 17:52:23,536 INFO L226 Difference]: Without dead ends: 6377 [2019-10-02 17:52:23,538 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 17:52:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6377 states. [2019-10-02 17:52:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6377 to 6306. [2019-10-02 17:52:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6306 states. [2019-10-02 17:52:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 9051 transitions. [2019-10-02 17:52:23,721 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 9051 transitions. Word has length 178 [2019-10-02 17:52:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:52:23,723 INFO L475 AbstractCegarLoop]: Abstraction has 6306 states and 9051 transitions. [2019-10-02 17:52:23,723 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:52:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 9051 transitions. [2019-10-02 17:52:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-02 17:52:23,746 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:52:23,747 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-02 17:52:23,747 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:52:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:23,748 INFO L82 PathProgramCache]: Analyzing trace with hash -993562373, now seen corresponding path program 1 times [2019-10-02 17:52:23,748 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:52:23,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:23,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:52:23,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:52:23,753 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:52:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:52:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:52:23,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:52:23,908 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:52:23,909 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 182 with the following transitions: [2019-10-02 17:52:23,912 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [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], [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], [741], [743], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-10-02 17:52:23,969 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:52:23,969 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)