java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:42:22,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:42:22,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:42:22,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:42:22,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 19:42:22,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 19:42:22,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 19:42:22,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 19:42:22,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 19:42:22,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 19:42:22,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 19:42:22,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 19:42:22,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 19:42:22,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 19:42:22,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 19:42:22,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 19:42:22,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 19:42:22,234 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 19:42:22,250 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:42:22,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:42:22,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:42:22,251 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:42:22,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:42:22,252 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:42:22,252 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:42:22,252 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:42:22,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:42:22,252 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:42:22,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:42:22,253 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:42:22,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:42:22,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:42:22,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:42:22,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:42:22,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:42:22,255 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:42:22,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:42:22,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:42:22,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:42:22,255 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:42:22,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:42:22,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:42:22,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:42:22,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:42:22,257 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:42:22,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:42:22,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:42:22,257 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:42:22,286 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:42:22,299 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:42:22,303 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:42:22,304 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:42:22,305 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:42:22,305 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-10-02 19:42:22,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cada6dc6/03e8fce94a0f4bf3bdd13bdbb0108fb5/FLAGec08c18de [2019-10-02 19:42:23,002 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:42:23,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-10-02 19:42:23,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cada6dc6/03e8fce94a0f4bf3bdd13bdbb0108fb5/FLAGec08c18de [2019-10-02 19:42:23,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cada6dc6/03e8fce94a0f4bf3bdd13bdbb0108fb5 [2019-10-02 19:42:23,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:42:23,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:42:23,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:42:23,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:42:23,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:42:23,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:42:23" (1/1) ... [2019-10-02 19:42:23,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a73aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:23, skipping insertion in model container [2019-10-02 19:42:23,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:42:23" (1/1) ... [2019-10-02 19:42:23,290 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:42:23,366 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:42:24,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:42:24,148 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:42:24,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:42:24,429 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:42:24,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24 WrapperNode [2019-10-02 19:42:24,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:42:24,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:42:24,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:42:24,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:42:24,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24" (1/1) ... [2019-10-02 19:42:24,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24" (1/1) ... [2019-10-02 19:42:24,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24" (1/1) ... [2019-10-02 19:42:24,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24" (1/1) ... [2019-10-02 19:42:24,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24" (1/1) ... [2019-10-02 19:42:24,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24" (1/1) ... [2019-10-02 19:42:24,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24" (1/1) ... [2019-10-02 19:42:24,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:42:24,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:42:24,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:42:24,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:42:24,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24" (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 19:42:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:42:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:42:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:42:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:42:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:42:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:42:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:42:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:42:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:42:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:42:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:42:26,624 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:42:26,625 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:42:26,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:42:26 BoogieIcfgContainer [2019-10-02 19:42:26,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:42:26,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:42:26,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:42:26,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:42:26,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:42:23" (1/3) ... [2019-10-02 19:42:26,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afb9909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:42:26, skipping insertion in model container [2019-10-02 19:42:26,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:42:24" (2/3) ... [2019-10-02 19:42:26,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afb9909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:42:26, skipping insertion in model container [2019-10-02 19:42:26,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:42:26" (3/3) ... [2019-10-02 19:42:26,638 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label28.c [2019-10-02 19:42:26,649 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:42:26,661 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:42:26,680 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:42:26,717 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:42:26,718 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:42:26,718 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:42:26,718 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:42:26,718 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:42:26,718 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:42:26,719 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:42:26,719 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:42:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:42:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-02 19:42:26,770 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:42:26,771 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] [2019-10-02 19:42:26,773 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:42:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:42:26,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1610348989, now seen corresponding path program 1 times [2019-10-02 19:42:26,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:42:26,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:42:26,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:42:26,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:42:26,836 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:42:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:42:27,239 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 19:42:27,242 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:42:27,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:42:27,243 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:42:27,249 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:42:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:42:27,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:42:27,274 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-02 19:42:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:42:29,487 INFO L93 Difference]: Finished difference Result 692 states and 953 transitions. [2019-10-02 19:42:29,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:42:29,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2019-10-02 19:42:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:42:29,512 INFO L225 Difference]: With dead ends: 692 [2019-10-02 19:42:29,512 INFO L226 Difference]: Without dead ends: 619 [2019-10-02 19:42:29,514 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 19:42:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-10-02 19:42:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2019-10-02 19:42:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-10-02 19:42:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2019-10-02 19:42:29,608 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 54 [2019-10-02 19:42:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:42:29,609 INFO L475 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2019-10-02 19:42:29,609 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:42:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2019-10-02 19:42:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-02 19:42:29,616 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:42:29,616 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:29,617 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:42:29,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:42:29,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1973618443, now seen corresponding path program 1 times [2019-10-02 19:42:29,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:42:29,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:42:29,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:42:29,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:42:29,620 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:42:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:42:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:42:29,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:42:29,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:42:29,783 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:42:29,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:42:29,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:42:29,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:42:29,785 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand 4 states. [2019-10-02 19:42:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:42:31,734 INFO L93 Difference]: Finished difference Result 1765 states and 2376 transitions. [2019-10-02 19:42:31,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:42:31,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-02 19:42:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:42:31,747 INFO L225 Difference]: With dead ends: 1765 [2019-10-02 19:42:31,747 INFO L226 Difference]: Without dead ends: 1765 [2019-10-02 19:42:31,748 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:42:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2019-10-02 19:42:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1750. [2019-10-02 19:42:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1750 states. [2019-10-02 19:42:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2347 transitions. [2019-10-02 19:42:31,819 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2347 transitions. Word has length 127 [2019-10-02 19:42:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:42:31,821 INFO L475 AbstractCegarLoop]: Abstraction has 1750 states and 2347 transitions. [2019-10-02 19:42:31,821 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:42:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2347 transitions. [2019-10-02 19:42:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-02 19:42:31,828 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:42:31,828 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:31,828 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:42:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:42:31,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1199392174, now seen corresponding path program 1 times [2019-10-02 19:42:31,829 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:42:31,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:42:31,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:42:31,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:42:31,831 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:42:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:42:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:42:31,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:42:31,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:42:31,994 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:42:31,994 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:42:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:42:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:42:31,995 INFO L87 Difference]: Start difference. First operand 1750 states and 2347 transitions. Second operand 6 states. [2019-10-02 19:42:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:42:33,817 INFO L93 Difference]: Finished difference Result 2944 states and 3786 transitions. [2019-10-02 19:42:33,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:42:33,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-02 19:42:33,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:42:33,839 INFO L225 Difference]: With dead ends: 2944 [2019-10-02 19:42:33,840 INFO L226 Difference]: Without dead ends: 2944 [2019-10-02 19:42:33,840 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-02 19:42:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2019-10-02 19:42:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2929. [2019-10-02 19:42:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2929 states. [2019-10-02 19:42:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 3748 transitions. [2019-10-02 19:42:33,963 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 3748 transitions. Word has length 134 [2019-10-02 19:42:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:42:33,973 INFO L475 AbstractCegarLoop]: Abstraction has 2929 states and 3748 transitions. [2019-10-02 19:42:33,973 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:42:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 3748 transitions. [2019-10-02 19:42:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-02 19:42:33,996 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:42:33,996 INFO L411 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:42:33,997 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:42:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:42:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash -91916028, now seen corresponding path program 1 times [2019-10-02 19:42:34,001 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:42:34,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:42:34,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:42:34,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:42:34,003 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:42:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:42:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 44 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:42:34,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:42:34,507 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:42:34,508 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 208 with the following transitions: [2019-10-02 19:42:34,510 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [538], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:42:34,557 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:42:34,557 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:43:33,272 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:43:33,274 INFO L272 AbstractInterpreter]: Visited 85 different actions 85 times. Never merged. Never widened. Performed 219 root evaluator evaluations with a maximum evaluation depth of 17. Performed 219 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-10-02 19:43:33,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:43:33,279 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:44:46,689 INFO L227 lantSequenceWeakener]: Weakened 188 states. On average, predicates are now at 73.94% of their original sizes. [2019-10-02 19:44:46,689 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:44:46,798 INFO L420 sIntCurrentIteration]: We unified 206 AI predicates to 206 [2019-10-02 19:44:46,799 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:44:46,800 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:44:46,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2019-10-02 19:44:46,800 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:44:46,801 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:44:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:44:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:44:46,802 INFO L87 Difference]: Start difference. First operand 2929 states and 3748 transitions. Second operand 10 states.