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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:00:45,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:00:45,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:00:45,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:00:45,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 17:00:45,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 17:00:45,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 17:00:45,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 17:00:45,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 17:00:45,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 17:00:45,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 17:00:45,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 17:00:45,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 17:00:45,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 17:00:45,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 17:00:45,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 17:00:45,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 17:00:45,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 17:00:45,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 17:00:45,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 17:00:45,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 17:00:45,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 17:00:45,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 17:00:45,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 17:00:45,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 17:00:45,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 17:00:45,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 17:00:45,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 17:00:45,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 17:00:45,170 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:00:45,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:00:45,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:00:45,171 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:00:45,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:00:45,172 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:00:45,172 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:00:45,172 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:00:45,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:00:45,172 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:00:45,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:00:45,173 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:00:45,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:00:45,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:00:45,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:00:45,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:00:45,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:00:45,174 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:00:45,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:00:45,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:00:45,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:00:45,175 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:00:45,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:00:45,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:00:45,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:00:45,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:00:45,176 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:00:45,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:00:45,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:00:45,177 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:00:45,205 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:00:45,217 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:00:45,221 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:00:45,222 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:00:45,222 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:00:45,223 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label53.c [2019-10-02 17:00:45,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8dcebb5/965a0daafdf44ad2858be4d54905943d/FLAG78c5d2d0f [2019-10-02 17:00:45,814 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:00:45,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label53.c [2019-10-02 17:00:45,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8dcebb5/965a0daafdf44ad2858be4d54905943d/FLAG78c5d2d0f [2019-10-02 17:00:46,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8dcebb5/965a0daafdf44ad2858be4d54905943d [2019-10-02 17:00:46,063 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:00:46,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:00:46,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:00:46,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:00:46,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:00:46,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:00:46" (1/1) ... [2019-10-02 17:00:46,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112cb494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46, skipping insertion in model container [2019-10-02 17:00:46,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:00:46" (1/1) ... [2019-10-02 17:00:46,081 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:00:46,138 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:00:46,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:00:46,655 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:00:46,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:00:46,819 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:00:46,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46 WrapperNode [2019-10-02 17:00:46,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:00:46,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:00:46,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:00:46,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:00:46,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46" (1/1) ... [2019-10-02 17:00:46,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46" (1/1) ... [2019-10-02 17:00:46,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46" (1/1) ... [2019-10-02 17:00:46,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46" (1/1) ... [2019-10-02 17:00:46,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46" (1/1) ... [2019-10-02 17:00:46,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46" (1/1) ... [2019-10-02 17:00:46,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46" (1/1) ... [2019-10-02 17:00:46,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:00:46,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:00:46,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:00:46,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:00:46,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:00:46,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:00:46,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:00:46,991 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:00:46,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:00:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:00:46,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:00:46,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:00:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:00:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:00:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:00:46,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:00:48,173 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:00:48,174 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:00:48,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:00:48 BoogieIcfgContainer [2019-10-02 17:00:48,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:00:48,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:00:48,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:00:48,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:00:48,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:00:46" (1/3) ... [2019-10-02 17:00:48,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209de5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:00:48, skipping insertion in model container [2019-10-02 17:00:48,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:46" (2/3) ... [2019-10-02 17:00:48,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209de5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:00:48, skipping insertion in model container [2019-10-02 17:00:48,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:00:48" (3/3) ... [2019-10-02 17:00:48,183 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label53.c [2019-10-02 17:00:48,193 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:00:48,201 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:00:48,217 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:00:48,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:00:48,244 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:00:48,244 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:00:48,244 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:00:48,245 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:00:48,245 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:00:48,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:00:48,245 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:00:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 17:00:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-02 17:00:48,284 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:48,285 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] [2019-10-02 17:00:48,288 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash 597031182, now seen corresponding path program 1 times [2019-10-02 17:00:48,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:48,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:48,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:48,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:48,340 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:48,781 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:48,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:00:48,782 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:48,790 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:00:48,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:00:48,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:48,808 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-02 17:00:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:49,797 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2019-10-02 17:00:49,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:00:49,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-10-02 17:00:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:49,831 INFO L225 Difference]: With dead ends: 346 [2019-10-02 17:00:49,831 INFO L226 Difference]: Without dead ends: 278 [2019-10-02 17:00:49,835 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-02 17:00:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-02 17:00:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 17:00:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-02 17:00:49,943 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 120 [2019-10-02 17:00:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:49,945 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-02 17:00:49,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:00:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-02 17:00:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-02 17:00:49,957 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:49,957 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] [2019-10-02 17:00:49,958 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:49,959 INFO L82 PathProgramCache]: Analyzing trace with hash 330455461, now seen corresponding path program 1 times [2019-10-02 17:00:49,959 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:49,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:49,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:49,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:49,963 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:50,113 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 17:00:50,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:50,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:00:50,113 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:50,115 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:00:50,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:00:50,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:00:50,116 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-02 17:00:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:50,882 INFO L93 Difference]: Finished difference Result 431 states and 612 transitions. [2019-10-02 17:00:50,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:00:50,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2019-10-02 17:00:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:50,890 INFO L225 Difference]: With dead ends: 431 [2019-10-02 17:00:50,890 INFO L226 Difference]: Without dead ends: 431 [2019-10-02 17:00:50,891 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 17:00:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-02 17:00:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-02 17:00:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-02 17:00:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-02 17:00:50,921 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 130 [2019-10-02 17:00:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:50,924 INFO L475 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-02 17:00:50,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:00:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-02 17:00:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-02 17:00:50,927 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:50,927 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] [2019-10-02 17:00:50,928 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:50,928 INFO L82 PathProgramCache]: Analyzing trace with hash -46995225, now seen corresponding path program 1 times [2019-10-02 17:00:50,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:50,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:50,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:50,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:50,936 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:51,250 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 17:00:51,250 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:51,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 17:00:51,251 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:51,251 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 17:00:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 17:00:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-02 17:00:51,252 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 5 states. [2019-10-02 17:00:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:51,938 INFO L93 Difference]: Finished difference Result 520 states and 690 transitions. [2019-10-02 17:00:51,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 17:00:51,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-10-02 17:00:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:51,945 INFO L225 Difference]: With dead ends: 520 [2019-10-02 17:00:51,945 INFO L226 Difference]: Without dead ends: 417 [2019-10-02 17:00:51,946 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 17:00:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-10-02 17:00:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2019-10-02 17:00:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-10-02 17:00:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 550 transitions. [2019-10-02 17:00:51,960 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 550 transitions. Word has length 131 [2019-10-02 17:00:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:51,960 INFO L475 AbstractCegarLoop]: Abstraction has 417 states and 550 transitions. [2019-10-02 17:00:51,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 17:00:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 550 transitions. [2019-10-02 17:00:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-02 17:00:51,962 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:51,963 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:51,963 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:51,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1746951265, now seen corresponding path program 1 times [2019-10-02 17:00:51,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:51,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:51,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:51,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:51,965 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:52,261 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:52,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 17:00:52,261 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:52,262 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 17:00:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 17:00:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-02 17:00:52,262 INFO L87 Difference]: Start difference. First operand 417 states and 550 transitions. Second operand 5 states. [2019-10-02 17:00:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:52,870 INFO L93 Difference]: Finished difference Result 501 states and 634 transitions. [2019-10-02 17:00:52,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 17:00:52,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-02 17:00:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:52,875 INFO L225 Difference]: With dead ends: 501 [2019-10-02 17:00:52,875 INFO L226 Difference]: Without dead ends: 417 [2019-10-02 17:00:52,875 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-02 17:00:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-10-02 17:00:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2019-10-02 17:00:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-10-02 17:00:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 547 transitions. [2019-10-02 17:00:52,888 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 547 transitions. Word has length 132 [2019-10-02 17:00:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:52,889 INFO L475 AbstractCegarLoop]: Abstraction has 417 states and 547 transitions. [2019-10-02 17:00:52,889 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 17:00:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 547 transitions. [2019-10-02 17:00:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-02 17:00:52,891 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:52,891 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:52,891 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:52,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1219225115, now seen corresponding path program 1 times [2019-10-02 17:00:52,892 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:52,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:52,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:52,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:52,894 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:53,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:53,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:00:53,029 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:53,029 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:00:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:00:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:53,031 INFO L87 Difference]: Start difference. First operand 417 states and 547 transitions. Second operand 3 states. [2019-10-02 17:00:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:53,620 INFO L93 Difference]: Finished difference Result 826 states and 1069 transitions. [2019-10-02 17:00:53,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:00:53,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2019-10-02 17:00:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:53,625 INFO L225 Difference]: With dead ends: 826 [2019-10-02 17:00:53,626 INFO L226 Difference]: Without dead ends: 826 [2019-10-02 17:00:53,626 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2019-10-02 17:00:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2019-10-02 17:00:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2019-10-02 17:00:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1069 transitions. [2019-10-02 17:00:53,652 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1069 transitions. Word has length 137 [2019-10-02 17:00:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:53,652 INFO L475 AbstractCegarLoop]: Abstraction has 826 states and 1069 transitions. [2019-10-02 17:00:53,653 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:00:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1069 transitions. [2019-10-02 17:00:53,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-02 17:00:53,656 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:53,656 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:53,656 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:53,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1710204053, now seen corresponding path program 1 times [2019-10-02 17:00:53,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:53,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:53,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:53,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:53,659 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:53,735 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:53,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:00:53,735 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:53,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:00:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:00:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:00:53,737 INFO L87 Difference]: Start difference. First operand 826 states and 1069 transitions. Second operand 6 states. [2019-10-02 17:00:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:54,366 INFO L93 Difference]: Finished difference Result 1555 states and 2007 transitions. [2019-10-02 17:00:54,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:00:54,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-10-02 17:00:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:54,380 INFO L225 Difference]: With dead ends: 1555 [2019-10-02 17:00:54,380 INFO L226 Difference]: Without dead ends: 1555 [2019-10-02 17:00:54,382 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 17:00:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2019-10-02 17:00:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1531. [2019-10-02 17:00:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1531 states. [2019-10-02 17:00:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1928 transitions. [2019-10-02 17:00:54,462 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1928 transitions. Word has length 138 [2019-10-02 17:00:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:54,462 INFO L475 AbstractCegarLoop]: Abstraction has 1531 states and 1928 transitions. [2019-10-02 17:00:54,462 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:00:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1928 transitions. [2019-10-02 17:00:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-02 17:00:54,470 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:54,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:54,471 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:54,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:54,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2034569339, now seen corresponding path program 1 times [2019-10-02 17:00:54,472 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:54,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:54,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:54,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:54,479 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 17:00:54,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:00:54,635 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:00:54,637 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 147 with the following transitions: [2019-10-02 17:00:54,639 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [66], [70], [74], [77], [78], [82], [86], [90], [94], [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], [605], [607], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 17:00:54,689 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:00:54,689 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)