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/Problem10_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 18:44:58,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 18:44:58,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 18:44:58,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 18:44:58,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 18:44:58,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 18:44:58,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 18:44:58,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 18:44:58,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 18:44:58,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 18:44:58,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 18:44:58,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 18:44:58,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 18:44:58,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 18:44:58,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 18:44:58,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 18:44:58,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 18:44:58,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 18:44:58,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 18:44:58,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 18:44:58,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 18:44:58,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 18:44:58,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 18:44:58,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 18:44:58,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 18:44:58,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 18:44:58,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 18:44:58,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 18:44:58,168 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 18:44:58,183 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 18:44:58,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 18:44:58,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 18:44:58,184 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 18:44:58,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 18:44:58,185 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 18:44:58,185 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 18:44:58,186 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 18:44:58,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 18:44:58,186 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 18:44:58,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 18:44:58,187 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 18:44:58,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 18:44:58,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 18:44:58,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 18:44:58,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 18:44:58,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 18:44:58,188 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 18:44:58,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 18:44:58,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 18:44:58,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 18:44:58,189 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 18:44:58,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 18:44:58,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:44:58,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 18:44:58,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 18:44:58,190 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 18:44:58,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 18:44:58,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 18:44:58,191 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 18:44:58,224 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 18:44:58,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 18:44:58,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 18:44:58,241 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 18:44:58,242 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 18:44:58,242 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label18.c [2019-10-02 18:44:58,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99b2a8397/76f6b44787904f7cb897d06e0874eafa/FLAGfcc98eb97 [2019-10-02 18:44:58,919 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 18:44:58,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label18.c [2019-10-02 18:44:58,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99b2a8397/76f6b44787904f7cb897d06e0874eafa/FLAGfcc98eb97 [2019-10-02 18:44:59,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99b2a8397/76f6b44787904f7cb897d06e0874eafa [2019-10-02 18:44:59,194 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 18:44:59,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 18:44:59,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 18:44:59,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 18:44:59,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 18:44:59,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:44:59" (1/1) ... [2019-10-02 18:44:59,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f01cc96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:59, skipping insertion in model container [2019-10-02 18:44:59,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:44:59" (1/1) ... [2019-10-02 18:44:59,213 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 18:44:59,270 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 18:44:59,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:44:59,964 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 18:45:00,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:45:00,107 INFO L192 MainTranslator]: Completed translation [2019-10-02 18:45:00,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00 WrapperNode [2019-10-02 18:45:00,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 18:45:00,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 18:45:00,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 18:45:00,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 18:45:00,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00" (1/1) ... [2019-10-02 18:45:00,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00" (1/1) ... [2019-10-02 18:45:00,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00" (1/1) ... [2019-10-02 18:45:00,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00" (1/1) ... [2019-10-02 18:45:00,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00" (1/1) ... [2019-10-02 18:45:00,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00" (1/1) ... [2019-10-02 18:45:00,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00" (1/1) ... [2019-10-02 18:45:00,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 18:45:00,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 18:45:00,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 18:45:00,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 18:45:00,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00" (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 18:45:00,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 18:45:00,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 18:45:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 18:45:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 18:45:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 18:45:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 18:45:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 18:45:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 18:45:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 18:45:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 18:45:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 18:45:01,701 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 18:45:01,701 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 18:45:01,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:45:01 BoogieIcfgContainer [2019-10-02 18:45:01,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 18:45:01,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 18:45:01,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 18:45:01,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 18:45:01,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 06:44:59" (1/3) ... [2019-10-02 18:45:01,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22898836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:45:01, skipping insertion in model container [2019-10-02 18:45:01,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:45:00" (2/3) ... [2019-10-02 18:45:01,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22898836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:45:01, skipping insertion in model container [2019-10-02 18:45:01,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:45:01" (3/3) ... [2019-10-02 18:45:01,711 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label18.c [2019-10-02 18:45:01,719 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 18:45:01,726 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 18:45:01,741 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 18:45:01,769 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 18:45:01,770 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 18:45:01,770 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 18:45:01,770 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 18:45:01,770 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 18:45:01,771 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 18:45:01,771 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 18:45:01,771 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 18:45:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 18:45:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-02 18:45:01,808 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:45:01,809 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] [2019-10-02 18:45:01,811 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:45:01,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:45:01,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1635976175, now seen corresponding path program 1 times [2019-10-02 18:45:01,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:45:01,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:45:01,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:45:01,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:45:01,867 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:45:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:45:02,198 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 18:45:02,201 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:45:02,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 18:45:02,201 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:45:02,210 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 18:45:02,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 18:45:02,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:45:02,224 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 18:45:03,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:45:03,298 INFO L93 Difference]: Finished difference Result 362 states and 553 transitions. [2019-10-02 18:45:03,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 18:45:03,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-10-02 18:45:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:45:03,324 INFO L225 Difference]: With dead ends: 362 [2019-10-02 18:45:03,325 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 18:45:03,328 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 18:45:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 18:45:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 18:45:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 18:45:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 436 transitions. [2019-10-02 18:45:03,421 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 436 transitions. Word has length 64 [2019-10-02 18:45:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:45:03,422 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 436 transitions. [2019-10-02 18:45:03,422 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 18:45:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 436 transitions. [2019-10-02 18:45:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-02 18:45:03,430 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:45:03,431 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, 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] [2019-10-02 18:45:03,431 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:45:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:45:03,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1834803011, now seen corresponding path program 1 times [2019-10-02 18:45:03,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:45:03,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:45:03,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:45:03,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:45:03,434 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:45:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:45:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 18:45:03,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:45:03,725 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:45:03,726 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 152 with the following transitions: [2019-10-02 18:45:03,729 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], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:45:03,781 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:45:03,782 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:45:20,601 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:45:20,604 INFO L272 AbstractInterpreter]: Visited 91 different actions 91 times. Never merged. Never widened. Performed 128 root evaluator evaluations with a maximum evaluation depth of 16. Performed 128 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 18:45:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:45:20,608 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:45:34,121 INFO L227 lantSequenceWeakener]: Weakened 145 states. On average, predicates are now at 73.96% of their original sizes. [2019-10-02 18:45:34,122 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:45:34,172 INFO L420 sIntCurrentIteration]: We unified 150 AI predicates to 150 [2019-10-02 18:45:34,173 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:45:34,174 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:45:34,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-10-02 18:45:34,174 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:45:34,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 18:45:34,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 18:45:34,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 18:45:34,176 INFO L87 Difference]: Start difference. First operand 294 states and 436 transitions. Second operand 7 states. [2019-10-02 18:45:38,690 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:48:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:48:31,631 INFO L93 Difference]: Finished difference Result 438 states and 586 transitions. [2019-10-02 18:48:31,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:48:31,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 151 [2019-10-02 18:48:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:48:31,636 INFO L225 Difference]: With dead ends: 438 [2019-10-02 18:48:31,636 INFO L226 Difference]: Without dead ends: 438 [2019-10-02 18:48:31,637 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-02 18:48:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-10-02 18:48:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2019-10-02 18:48:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-02 18:48:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 585 transitions. [2019-10-02 18:48:31,679 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 585 transitions. Word has length 151 [2019-10-02 18:48:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:48:31,680 INFO L475 AbstractCegarLoop]: Abstraction has 437 states and 585 transitions. [2019-10-02 18:48:31,680 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 18:48:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 585 transitions. [2019-10-02 18:48:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-10-02 18:48:31,695 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:48:31,696 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 18:48:31,696 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:48:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:48:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1798357382, now seen corresponding path program 1 times [2019-10-02 18:48:31,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:48:31,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:48:31,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:48:31,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:48:31,699 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:48:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:48:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-02 18:48:31,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:48:31,972 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:48:31,972 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 222 with the following transitions: [2019-10-02 18:48:31,974 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], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:48:31,984 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:48:31,990 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:48:34,902 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:49:15,084 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:49:15,085 INFO L272 AbstractInterpreter]: Visited 95 different actions 184 times. Merged at 4 different actions 4 times. Never widened. Performed 380 root evaluator evaluations with a maximum evaluation depth of 16. Performed 380 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 18:49:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:49:15,086 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:49:45,714 INFO L227 lantSequenceWeakener]: Weakened 218 states. On average, predicates are now at 73.61% of their original sizes. [2019-10-02 18:49:45,714 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:49:45,807 INFO L420 sIntCurrentIteration]: We unified 220 AI predicates to 220 [2019-10-02 18:49:45,808 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:49:45,808 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:49:45,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2019-10-02 18:49:45,809 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:49:45,809 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 18:49:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 18:49:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 18:49:45,810 INFO L87 Difference]: Start difference. First operand 437 states and 585 transitions. Second operand 10 states. [2019-10-02 18:54:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:54:06,675 INFO L93 Difference]: Finished difference Result 584 states and 744 transitions. [2019-10-02 18:54:06,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 18:54:06,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 221 [2019-10-02 18:54:06,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:54:06,680 INFO L225 Difference]: With dead ends: 584 [2019-10-02 18:54:06,681 INFO L226 Difference]: Without dead ends: 584 [2019-10-02 18:54:06,681 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 18:54:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-02 18:54:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2019-10-02 18:54:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-10-02 18:54:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 742 transitions. [2019-10-02 18:54:06,702 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 742 transitions. Word has length 221 [2019-10-02 18:54:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:54:06,702 INFO L475 AbstractCegarLoop]: Abstraction has 582 states and 742 transitions. [2019-10-02 18:54:06,703 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 18:54:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 742 transitions. [2019-10-02 18:54:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-02 18:54:06,707 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:54:06,708 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:54:06,708 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:54:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:54:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash -416252769, now seen corresponding path program 1 times [2019-10-02 18:54:06,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:54:06,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:54:06,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:54:06,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:54:06,710 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:54:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:54:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 115 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 18:54:06,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:54:06,951 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:54:06,951 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 231 with the following transitions: [2019-10-02 18:54:06,952 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], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:54:06,955 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:54:06,956 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:54:17,641 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:54:37,279 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:54:37,280 INFO L272 AbstractInterpreter]: Visited 95 different actions 183 times. Merged at 3 different actions 3 times. Never widened. Performed 317 root evaluator evaluations with a maximum evaluation depth of 16. Performed 317 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 18:54:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:54:37,280 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:55:00,801 INFO L227 lantSequenceWeakener]: Weakened 227 states. On average, predicates are now at 73.57% of their original sizes. [2019-10-02 18:55:00,802 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:55:00,898 INFO L420 sIntCurrentIteration]: We unified 229 AI predicates to 229 [2019-10-02 18:55:00,898 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:55:00,898 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:55:00,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 18:55:00,899 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:55:00,900 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 18:55:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 18:55:00,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 18:55:00,900 INFO L87 Difference]: Start difference. First operand 582 states and 742 transitions. Second operand 11 states. [2019-10-02 18:58:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:58:07,315 INFO L93 Difference]: Finished difference Result 749 states and 919 transitions. [2019-10-02 18:58:07,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 18:58:07,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 230 [2019-10-02 18:58:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:58:07,320 INFO L225 Difference]: With dead ends: 749 [2019-10-02 18:58:07,320 INFO L226 Difference]: Without dead ends: 749 [2019-10-02 18:58:07,321 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 18:58:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2019-10-02 18:58:07,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 727. [2019-10-02 18:58:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2019-10-02 18:58:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 894 transitions. [2019-10-02 18:58:07,341 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 894 transitions. Word has length 230 [2019-10-02 18:58:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:58:07,342 INFO L475 AbstractCegarLoop]: Abstraction has 727 states and 894 transitions. [2019-10-02 18:58:07,342 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 18:58:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 894 transitions. [2019-10-02 18:58:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-10-02 18:58:07,347 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:58:07,347 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:07,347 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:58:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:58:07,348 INFO L82 PathProgramCache]: Analyzing trace with hash 866632359, now seen corresponding path program 1 times [2019-10-02 18:58:07,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:58:07,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:58:07,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:58:07,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:58:07,350 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:58:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:58:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 141 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:58:07,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:58:07,939 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:58:07,940 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 267 with the following transitions: [2019-10-02 18:58:07,940 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], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:58:07,946 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:58:07,946 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:58:40,509 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.