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/Problem13_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:58:38,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:58:38,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:58:38,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 16:58:38,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 16:58:38,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 16:58:38,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 16:58:38,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 16:58:38,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 16:58:38,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 16:58:38,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 16:58:38,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 16:58:38,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 16:58:38,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 16:58:38,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 16:58:38,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 16:58:38,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 16:58:38,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 16:58:38,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 16:58:38,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 16:58:38,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 16:58:38,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 16:58:38,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 16:58:38,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 16:58:38,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 16:58:38,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:58:38,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:58:38,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:58:38,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:58:38,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:58:38,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:58:38,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:58:38,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:58:38,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:58:38,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:58:38,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:58:38,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 16:58:38,307 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:58:38,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:58:38,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:58:38,308 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:58:38,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:58:38,308 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:58:38,309 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:58:38,309 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:58:38,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:58:38,309 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:58:38,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:58:38,310 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:58:38,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:58:38,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:58:38,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:58:38,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:58:38,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:58:38,311 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:58:38,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:58:38,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:58:38,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:58:38,312 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:58:38,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:58:38,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:58:38,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:58:38,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:58:38,313 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:58:38,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:58:38,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:58:38,314 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:58:38,342 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:58:38,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:58:38,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:58:38,359 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:58:38,360 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:58:38,360 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label03.c [2019-09-09 16:58:38,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15dda44f4/0180b4d25c88448dbfc356a95c07b13b/FLAG083bec8b6 [2019-09-09 16:58:39,242 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:58:39,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label03.c [2019-09-09 16:58:39,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15dda44f4/0180b4d25c88448dbfc356a95c07b13b/FLAG083bec8b6 [2019-09-09 16:58:39,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15dda44f4/0180b4d25c88448dbfc356a95c07b13b [2019-09-09 16:58:39,757 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:58:39,759 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:58:39,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:58:39,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:58:39,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:58:39,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:58:39" (1/1) ... [2019-09-09 16:58:39,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1371313d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:39, skipping insertion in model container [2019-09-09 16:58:39,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:58:39" (1/1) ... [2019-09-09 16:58:39,776 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:58:39,987 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:58:41,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:58:41,439 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:58:42,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:58:42,451 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:58:42,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42 WrapperNode [2019-09-09 16:58:42,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:58:42,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:58:42,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:58:42,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:58:42,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42" (1/1) ... [2019-09-09 16:58:42,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42" (1/1) ... [2019-09-09 16:58:42,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42" (1/1) ... [2019-09-09 16:58:42,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42" (1/1) ... [2019-09-09 16:58:42,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42" (1/1) ... [2019-09-09 16:58:42,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42" (1/1) ... [2019-09-09 16:58:42,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42" (1/1) ... [2019-09-09 16:58:42,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:58:42,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:58:42,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:58:42,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:58:42,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:58:42,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:58:42,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:58:42,933 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:58:42,934 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:58:42,935 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:58:42,935 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:58:42,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:58:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:58:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:58:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:58:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:58:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:58:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:58:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:58:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:58:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:58:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:58:49,454 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:58:49,455 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:58:49,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:58:49 BoogieIcfgContainer [2019-09-09 16:58:49,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:58:49,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:58:49,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:58:49,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:58:49,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:58:39" (1/3) ... [2019-09-09 16:58:49,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194ce470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:58:49, skipping insertion in model container [2019-09-09 16:58:49,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:58:42" (2/3) ... [2019-09-09 16:58:49,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194ce470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:58:49, skipping insertion in model container [2019-09-09 16:58:49,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:58:49" (3/3) ... [2019-09-09 16:58:49,477 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label03.c [2019-09-09 16:58:49,488 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:58:49,498 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:58:49,516 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:58:49,546 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:58:49,546 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:58:49,547 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:58:49,547 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:58:49,547 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:58:49,547 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:58:49,547 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:58:49,548 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:58:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 16:58:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-09 16:58:49,605 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:58:49,606 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:58:49,608 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:58:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:58:49,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1631378225, now seen corresponding path program 1 times [2019-09-09 16:58:49,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:58:49,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:58:49,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:58:49,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:58:49,666 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:58:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:58:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:58:49,885 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:58:49,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:58:49,885 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:58:49,891 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:58:49,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:58:49,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:58:49,910 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-09-09 16:59:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:59:00,525 INFO L93 Difference]: Finished difference Result 2948 states and 5337 transitions. [2019-09-09 16:59:00,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:59:00,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-09-09 16:59:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:59:00,565 INFO L225 Difference]: With dead ends: 2948 [2019-09-09 16:59:00,565 INFO L226 Difference]: Without dead ends: 2861 [2019-09-09 16:59:00,568 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:59:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2019-09-09 16:59:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 1910. [2019-09-09 16:59:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1910 states. [2019-09-09 16:59:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3427 transitions. [2019-09-09 16:59:00,763 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3427 transitions. Word has length 40 [2019-09-09 16:59:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:59:00,764 INFO L475 AbstractCegarLoop]: Abstraction has 1910 states and 3427 transitions. [2019-09-09 16:59:00,764 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:59:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3427 transitions. [2019-09-09 16:59:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-09 16:59:00,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:59:00,774 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:59:00,774 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:59:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:59:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1540007170, now seen corresponding path program 1 times [2019-09-09 16:59:00,775 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:59:00,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:00,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:59:00,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:00,778 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:59:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:59:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:59:01,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:59:01,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:59:01,094 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:59:01,096 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:59:01,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:59:01,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:59:01,097 INFO L87 Difference]: Start difference. First operand 1910 states and 3427 transitions. Second operand 6 states. [2019-09-09 16:59:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:59:08,657 INFO L93 Difference]: Finished difference Result 3633 states and 5971 transitions. [2019-09-09 16:59:08,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:59:08,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2019-09-09 16:59:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:59:08,682 INFO L225 Difference]: With dead ends: 3633 [2019-09-09 16:59:08,682 INFO L226 Difference]: Without dead ends: 3633 [2019-09-09 16:59:08,683 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 16:59:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2019-09-09 16:59:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 3606. [2019-09-09 16:59:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3606 states. [2019-09-09 16:59:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5912 transitions. [2019-09-09 16:59:08,806 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5912 transitions. Word has length 112 [2019-09-09 16:59:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:59:08,808 INFO L475 AbstractCegarLoop]: Abstraction has 3606 states and 5912 transitions. [2019-09-09 16:59:08,808 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:59:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5912 transitions. [2019-09-09 16:59:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 16:59:08,819 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:59:08,820 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:59:08,820 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:59:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:59:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1685674647, now seen corresponding path program 1 times [2019-09-09 16:59:08,821 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:59:08,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:08,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:59:08,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:08,824 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:59:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:59:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:59:09,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:59:09,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 16:59:09,011 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:59:09,013 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 16:59:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 16:59:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 16:59:09,014 INFO L87 Difference]: Start difference. First operand 3606 states and 5912 transitions. Second operand 5 states. [2019-09-09 16:59:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:59:17,780 INFO L93 Difference]: Finished difference Result 7292 states and 11257 transitions. [2019-09-09 16:59:17,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 16:59:17,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-09-09 16:59:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:59:17,818 INFO L225 Difference]: With dead ends: 7292 [2019-09-09 16:59:17,818 INFO L226 Difference]: Without dead ends: 7292 [2019-09-09 16:59:17,819 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 16:59:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7292 states. [2019-09-09 16:59:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7292 to 7096. [2019-09-09 16:59:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7096 states. [2019-09-09 16:59:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 10797 transitions. [2019-09-09 16:59:18,015 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 10797 transitions. Word has length 141 [2019-09-09 16:59:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:59:18,016 INFO L475 AbstractCegarLoop]: Abstraction has 7096 states and 10797 transitions. [2019-09-09 16:59:18,016 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 16:59:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 10797 transitions. [2019-09-09 16:59:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-09 16:59:18,018 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:59:18,018 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:59:18,018 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:59:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:59:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1620335089, now seen corresponding path program 1 times [2019-09-09 16:59:18,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:59:18,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:18,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:59:18,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:18,021 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:59:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:59:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:59:18,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:59:18,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 16:59:18,159 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:59:18,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 16:59:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 16:59:18,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 16:59:18,161 INFO L87 Difference]: Start difference. First operand 7096 states and 10797 transitions. Second operand 5 states. [2019-09-09 16:59:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:59:28,934 INFO L93 Difference]: Finished difference Result 14397 states and 22090 transitions. [2019-09-09 16:59:28,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 16:59:28,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-09-09 16:59:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:59:29,002 INFO L225 Difference]: With dead ends: 14397 [2019-09-09 16:59:29,003 INFO L226 Difference]: Without dead ends: 14397 [2019-09-09 16:59:29,003 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 16:59:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2019-09-09 16:59:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 14161. [2019-09-09 16:59:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14161 states. [2019-09-09 16:59:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14161 states to 14161 states and 21540 transitions. [2019-09-09 16:59:29,379 INFO L78 Accepts]: Start accepts. Automaton has 14161 states and 21540 transitions. Word has length 145 [2019-09-09 16:59:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:59:29,382 INFO L475 AbstractCegarLoop]: Abstraction has 14161 states and 21540 transitions. [2019-09-09 16:59:29,382 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 16:59:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 14161 states and 21540 transitions. [2019-09-09 16:59:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-09 16:59:29,385 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:59:29,385 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:59:29,386 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:59:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:59:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash -820048069, now seen corresponding path program 1 times [2019-09-09 16:59:29,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:59:29,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:29,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:59:29,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:29,387 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:59:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:59:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:59:29,544 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:59:29,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:59:29,544 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:59:29,545 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:59:29,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:59:29,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:59:29,546 INFO L87 Difference]: Start difference. First operand 14161 states and 21540 transitions. Second operand 4 states. [2019-09-09 16:59:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:59:38,298 INFO L93 Difference]: Finished difference Result 39872 states and 60327 transitions. [2019-09-09 16:59:38,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:59:38,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-09-09 16:59:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:59:38,490 INFO L225 Difference]: With dead ends: 39872 [2019-09-09 16:59:38,490 INFO L226 Difference]: Without dead ends: 39872 [2019-09-09 16:59:38,491 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:59:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39872 states. [2019-09-09 16:59:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39872 to 39840. [2019-09-09 16:59:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39840 states. [2019-09-09 16:59:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39840 states to 39840 states and 60272 transitions. [2019-09-09 16:59:39,381 INFO L78 Accepts]: Start accepts. Automaton has 39840 states and 60272 transitions. Word has length 155 [2019-09-09 16:59:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:59:39,381 INFO L475 AbstractCegarLoop]: Abstraction has 39840 states and 60272 transitions. [2019-09-09 16:59:39,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:59:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 39840 states and 60272 transitions. [2019-09-09 16:59:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2019-09-09 16:59:39,394 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:59:39,395 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 16:59:39,395 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:59:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:59:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash -10269026, now seen corresponding path program 1 times [2019-09-09 16:59:39,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:59:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:39,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:59:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:59:39,399 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:59:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:59:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 16:59:39,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:59:39,704 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:59:39,705 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 308 with the following transitions: [2019-09-09 16:59:39,709 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2855], [2857], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3336], [3341], [3343], [3344], [3355], [3366], [3370], [3374], [3378], [3382], [3386], [3390], [3394], [3398], [3402], [3406], [3410], [3414], [3425], [3429], [3440], [3451], [3455], [3459], [3463], [3467], [3471], [3475], [3479], [3483], [3487], [3498], [3502], [3506], [3517], [3521], [3524], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 16:59:39,785 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:59:39,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:01:10,769 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:01:10,771 INFO L272 AbstractInterpreter]: Visited 154 different actions 154 times. Never merged. Never widened. Performed 195 root evaluator evaluations with a maximum evaluation depth of 18. Performed 195 inverse root evaluator evaluations with a maximum inverse evaluation depth of 18. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:01:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:01:10,776 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:03:13,518 INFO L227 lantSequenceWeakener]: Weakened 296 states. On average, predicates are now at 71.01% of their original sizes. [2019-09-09 17:03:13,518 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:03:13,562 INFO L420 sIntCurrentIteration]: We unified 306 AI predicates to 306 [2019-09-09 17:03:13,562 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:03:13,563 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:03:13,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:03:13,563 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:03:13,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:03:13,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:03:13,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:03:13,565 INFO L87 Difference]: Start difference. First operand 39840 states and 60272 transitions. Second operand 8 states. [2019-09-09 17:06:40,796 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.