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/Problem01_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 16:45:34,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 16:45:34,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 16:45:34,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 16:45:34,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 16:45:34,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 16:45:34,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 16:45:34,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 16:45:34,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 16:45:34,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 16:45:34,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 16:45:34,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 16:45:34,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 16:45:34,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 16:45:34,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 16:45:34,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 16:45:34,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 16:45:34,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 16:45:34,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 16:45:34,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 16:45:34,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 16:45:34,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 16:45:34,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 16:45:34,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 16:45:34,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 16:45:34,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 16:45:34,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 16:45:34,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 16:45:34,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 16:45:34,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 16:45:34,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 16:45:34,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 16:45:34,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 16:45:34,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 16:45:34,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 16:45:34,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 16:45:34,380 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 16:45:34,398 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 16:45:34,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 16:45:34,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 16:45:34,399 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 16:45:34,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 16:45:34,401 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 16:45:34,401 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 16:45:34,401 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 16:45:34,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 16:45:34,401 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 16:45:34,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 16:45:34,404 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 16:45:34,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 16:45:34,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 16:45:34,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 16:45:34,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 16:45:34,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 16:45:34,405 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 16:45:34,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 16:45:34,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 16:45:34,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 16:45:34,406 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 16:45:34,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 16:45:34,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:45:34,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 16:45:34,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 16:45:34,407 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 16:45:34,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 16:45:34,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 16:45:34,408 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 16:45:34,442 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 16:45:34,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 16:45:34,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 16:45:34,464 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 16:45:34,464 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 16:45:34,465 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label30.c [2019-10-02 16:45:34,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a653fe056/70be2f0bedf54d258f0f41ff3be25e91/FLAGd808afed1 [2019-10-02 16:45:35,111 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 16:45:35,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label30.c [2019-10-02 16:45:35,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a653fe056/70be2f0bedf54d258f0f41ff3be25e91/FLAGd808afed1 [2019-10-02 16:45:35,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a653fe056/70be2f0bedf54d258f0f41ff3be25e91 [2019-10-02 16:45:35,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 16:45:35,401 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 16:45:35,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 16:45:35,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 16:45:35,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 16:45:35,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:45:35" (1/1) ... [2019-10-02 16:45:35,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8962239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:35, skipping insertion in model container [2019-10-02 16:45:35,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:45:35" (1/1) ... [2019-10-02 16:45:35,428 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 16:45:35,482 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 16:45:36,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:45:36,008 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 16:45:36,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:45:36,148 INFO L192 MainTranslator]: Completed translation [2019-10-02 16:45:36,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36 WrapperNode [2019-10-02 16:45:36,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 16:45:36,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 16:45:36,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 16:45:36,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 16:45:36,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36" (1/1) ... [2019-10-02 16:45:36,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36" (1/1) ... [2019-10-02 16:45:36,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36" (1/1) ... [2019-10-02 16:45:36,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36" (1/1) ... [2019-10-02 16:45:36,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36" (1/1) ... [2019-10-02 16:45:36,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36" (1/1) ... [2019-10-02 16:45:36,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36" (1/1) ... [2019-10-02 16:45:36,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 16:45:36,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 16:45:36,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 16:45:36,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 16:45:36,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36" (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 16:45:36,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 16:45:36,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 16:45:36,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 16:45:36,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 16:45:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 16:45:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 16:45:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 16:45:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 16:45:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 16:45:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 16:45:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 16:45:37,722 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 16:45:37,723 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 16:45:37,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:45:37 BoogieIcfgContainer [2019-10-02 16:45:37,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 16:45:37,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 16:45:37,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 16:45:37,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 16:45:37,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 04:45:35" (1/3) ... [2019-10-02 16:45:37,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4599e769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:45:37, skipping insertion in model container [2019-10-02 16:45:37,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:36" (2/3) ... [2019-10-02 16:45:37,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4599e769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:45:37, skipping insertion in model container [2019-10-02 16:45:37,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:45:37" (3/3) ... [2019-10-02 16:45:37,736 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label30.c [2019-10-02 16:45:37,747 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 16:45:37,758 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 16:45:37,776 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 16:45:37,809 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 16:45:37,810 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 16:45:37,810 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 16:45:37,810 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 16:45:37,811 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 16:45:37,811 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 16:45:37,811 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 16:45:37,811 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 16:45:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 16:45:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-02 16:45:37,858 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:37,859 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] [2019-10-02 16:45:37,861 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:37,867 INFO L82 PathProgramCache]: Analyzing trace with hash -152148385, now seen corresponding path program 1 times [2019-10-02 16:45:37,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:37,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:37,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:37,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:37,919 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:38,525 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 16:45:38,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:45:38,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 16:45:38,528 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:45:38,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 16:45:38,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 16:45:38,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 16:45:38,566 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 4 states. [2019-10-02 16:45:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:45:40,045 INFO L93 Difference]: Finished difference Result 497 states and 763 transitions. [2019-10-02 16:45:40,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 16:45:40,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-02 16:45:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:45:40,067 INFO L225 Difference]: With dead ends: 497 [2019-10-02 16:45:40,067 INFO L226 Difference]: Without dead ends: 413 [2019-10-02 16:45:40,069 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 16:45:40,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2019-10-02 16:45:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 278. [2019-10-02 16:45:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 16:45:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-10-02 16:45:40,169 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 131 [2019-10-02 16:45:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:45:40,170 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-10-02 16:45:40,170 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 16:45:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-10-02 16:45:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-02 16:45:40,176 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:40,176 INFO L411 BasicCegarLoop]: trace histogram [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 16:45:40,177 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1159631208, now seen corresponding path program 1 times [2019-10-02 16:45:40,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:40,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:40,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:40,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:40,180 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:45:40,335 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:45:40,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 16:45:40,335 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:45:40,337 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 16:45:40,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 16:45:40,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 16:45:40,338 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 6 states. [2019-10-02 16:45:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:45:41,166 INFO L93 Difference]: Finished difference Result 431 states and 625 transitions. [2019-10-02 16:45:41,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 16:45:41,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-02 16:45:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:45:41,174 INFO L225 Difference]: With dead ends: 431 [2019-10-02 16:45:41,174 INFO L226 Difference]: Without dead ends: 431 [2019-10-02 16:45:41,177 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 16:45:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-02 16:45:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 417. [2019-10-02 16:45:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-10-02 16:45:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 597 transitions. [2019-10-02 16:45:41,234 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 597 transitions. Word has length 141 [2019-10-02 16:45:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:45:41,235 INFO L475 AbstractCegarLoop]: Abstraction has 417 states and 597 transitions. [2019-10-02 16:45:41,235 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 16:45:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 597 transitions. [2019-10-02 16:45:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-02 16:45:41,241 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:41,241 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 16:45:41,242 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1563736858, now seen corresponding path program 1 times [2019-10-02 16:45:41,243 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:41,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:41,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:41,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:41,248 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:45:41,617 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:45:41,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 16:45:41,618 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:45:41,619 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 16:45:41,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 16:45:41,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-02 16:45:41,619 INFO L87 Difference]: Start difference. First operand 417 states and 597 transitions. Second operand 5 states. [2019-10-02 16:45:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:45:42,362 INFO L93 Difference]: Finished difference Result 516 states and 697 transitions. [2019-10-02 16:45:42,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 16:45:42,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2019-10-02 16:45:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:45:42,367 INFO L225 Difference]: With dead ends: 516 [2019-10-02 16:45:42,367 INFO L226 Difference]: Without dead ends: 415 [2019-10-02 16:45:42,368 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-02 16:45:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2019-10-02 16:45:42,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2019-10-02 16:45:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2019-10-02 16:45:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 545 transitions. [2019-10-02 16:45:42,386 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 545 transitions. Word has length 142 [2019-10-02 16:45:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:45:42,387 INFO L475 AbstractCegarLoop]: Abstraction has 415 states and 545 transitions. [2019-10-02 16:45:42,387 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 16:45:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 545 transitions. [2019-10-02 16:45:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-02 16:45:42,391 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:42,391 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 16:45:42,391 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:42,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash -77416850, now seen corresponding path program 1 times [2019-10-02 16:45:42,392 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:42,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:42,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:42,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:42,395 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:45:42,511 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:45:42,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:45:42,512 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:45:42,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:45:42,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:45:42,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:45:42,513 INFO L87 Difference]: Start difference. First operand 415 states and 545 transitions. Second operand 3 states. [2019-10-02 16:45:43,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:45:43,005 INFO L93 Difference]: Finished difference Result 822 states and 1060 transitions. [2019-10-02 16:45:43,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:45:43,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-10-02 16:45:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:45:43,011 INFO L225 Difference]: With dead ends: 822 [2019-10-02 16:45:43,011 INFO L226 Difference]: Without dead ends: 822 [2019-10-02 16:45:43,011 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 16:45:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2019-10-02 16:45:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2019-10-02 16:45:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 822 states. [2019-10-02 16:45:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1060 transitions. [2019-10-02 16:45:43,039 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1060 transitions. Word has length 146 [2019-10-02 16:45:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:45:43,040 INFO L475 AbstractCegarLoop]: Abstraction has 822 states and 1060 transitions. [2019-10-02 16:45:43,040 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:45:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1060 transitions. [2019-10-02 16:45:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-02 16:45:43,044 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:43,044 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:43,045 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1784447858, now seen corresponding path program 1 times [2019-10-02 16:45:43,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:43,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:43,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:43,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:43,047 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:45:43,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:45:43,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 16:45:43,139 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:45:43,139 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 16:45:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 16:45:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 16:45:43,140 INFO L87 Difference]: Start difference. First operand 822 states and 1060 transitions. Second operand 6 states. [2019-10-02 16:45:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:45:43,888 INFO L93 Difference]: Finished difference Result 1267 states and 1646 transitions. [2019-10-02 16:45:43,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 16:45:43,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-10-02 16:45:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:45:43,901 INFO L225 Difference]: With dead ends: 1267 [2019-10-02 16:45:43,902 INFO L226 Difference]: Without dead ends: 1267 [2019-10-02 16:45:43,902 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 16:45:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2019-10-02 16:45:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1112. [2019-10-02 16:45:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-02 16:45:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1401 transitions. [2019-10-02 16:45:43,946 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1401 transitions. Word has length 162 [2019-10-02 16:45:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:45:43,947 INFO L475 AbstractCegarLoop]: Abstraction has 1112 states and 1401 transitions. [2019-10-02 16:45:43,947 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 16:45:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1401 transitions. [2019-10-02 16:45:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-02 16:45:43,952 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:43,953 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:43,953 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash 800655393, now seen corresponding path program 1 times [2019-10-02 16:45:43,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:43,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:43,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:43,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:43,955 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:45:44,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 16:45:44,100 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 16:45:44,101 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 175 with the following transitions: [2019-10-02 16:45:44,103 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [21], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [66], [70], [74], [78], [82], [86], [90], [94], [97], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [162], [166], [170], [174], [178], [182], [186], [190], [194], [198], [202], [206], [210], [214], [218], [222], [226], [230], [234], [238], [242], [246], [250], [254], [258], [262], [266], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [489], [497], [505], [513], [521], [529], [537], [545], [553], [561], [569], [577], [585], [593], [601], [609], [617], [625], [633], [641], [649], [657], [665], [673], [681], [689], [693], [695], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 16:45:44,209 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 16:45:44,209 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)