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/Problem03_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 07:46:52,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 07:46:52,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 07:46:52,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 07:46:52,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 07:46:52,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 07:46:52,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 07:46:52,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 07:46:52,772 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 07:46:52,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 07:46:52,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 07:46:52,776 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 07:46:52,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 07:46:52,776 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 07:46:52,777 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 07:46:52,777 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 07:46:52,777 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 07:46:52,777 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 07:46:52,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 07:46:52,778 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 07:46:52,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 07:46:52,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 07:46:52,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 07:46:52,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 07:46:52,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 07:46:52,782 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 07:46:52,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 07:46:52,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 07:46:52,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 07:46:52,783 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 07:46:52,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 07:46:52,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 07:46:52,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 07:46:52,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 07:46:52,784 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 07:46:52,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 07:46:52,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 07:46:52,787 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 07:46:52,838 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 07:46:52,858 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 07:46:52,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 07:46:52,865 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 07:46:52,866 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 07:46:52,867 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label33.c [2019-09-09 07:46:52,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b9e85f9/e19b93b79a74410e92db7018a19389aa/FLAGc7859a700 [2019-09-09 07:46:53,576 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 07:46:53,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label33.c [2019-09-09 07:46:53,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b9e85f9/e19b93b79a74410e92db7018a19389aa/FLAGc7859a700 [2019-09-09 07:46:53,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b9e85f9/e19b93b79a74410e92db7018a19389aa [2019-09-09 07:46:53,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 07:46:53,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 07:46:53,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 07:46:53,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 07:46:53,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 07:46:53,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:46:53" (1/1) ... [2019-09-09 07:46:53,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aedc329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:53, skipping insertion in model container [2019-09-09 07:46:53,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:46:53" (1/1) ... [2019-09-09 07:46:53,740 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 07:46:53,828 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 07:46:54,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:46:54,611 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 07:46:55,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:46:55,090 INFO L192 MainTranslator]: Completed translation [2019-09-09 07:46:55,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55 WrapperNode [2019-09-09 07:46:55,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 07:46:55,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 07:46:55,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 07:46:55,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 07:46:55,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55" (1/1) ... [2019-09-09 07:46:55,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55" (1/1) ... [2019-09-09 07:46:55,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55" (1/1) ... [2019-09-09 07:46:55,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55" (1/1) ... [2019-09-09 07:46:55,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55" (1/1) ... [2019-09-09 07:46:55,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55" (1/1) ... [2019-09-09 07:46:55,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55" (1/1) ... [2019-09-09 07:46:55,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 07:46:55,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 07:46:55,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 07:46:55,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 07:46:55,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 07:46:55,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 07:46:55,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 07:46:55,314 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 07:46:55,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 07:46:55,315 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 07:46:55,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 07:46:55,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 07:46:55,315 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 07:46:55,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 07:46:55,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 07:46:55,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 07:46:57,258 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 07:46:57,258 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 07:46:57,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:46:57 BoogieIcfgContainer [2019-09-09 07:46:57,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 07:46:57,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 07:46:57,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 07:46:57,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 07:46:57,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:46:53" (1/3) ... [2019-09-09 07:46:57,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2990a819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:46:57, skipping insertion in model container [2019-09-09 07:46:57,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:46:55" (2/3) ... [2019-09-09 07:46:57,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2990a819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:46:57, skipping insertion in model container [2019-09-09 07:46:57,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:46:57" (3/3) ... [2019-09-09 07:46:57,269 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label33.c [2019-09-09 07:46:57,279 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 07:46:57,288 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 07:46:57,306 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 07:46:57,334 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 07:46:57,335 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 07:46:57,335 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 07:46:57,335 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 07:46:57,335 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 07:46:57,335 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 07:46:57,336 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 07:46:57,336 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 07:46:57,362 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-09-09 07:46:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-09-09 07:46:57,384 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:46:57,386 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 07:46:57,388 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:46:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:46:57,397 INFO L82 PathProgramCache]: Analyzing trace with hash 10375448, now seen corresponding path program 1 times [2019-09-09 07:46:57,400 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:46:57,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:46:57,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:46:57,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:46:57,477 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:46:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:46:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:46:58,424 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:46:58,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 07:46:58,425 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:46:58,431 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 07:46:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 07:46:58,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 07:46:58,449 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2019-09-09 07:47:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:47:00,764 INFO L93 Difference]: Finished difference Result 765 states and 1280 transitions. [2019-09-09 07:47:00,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 07:47:00,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-09-09 07:47:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:47:00,792 INFO L225 Difference]: With dead ends: 765 [2019-09-09 07:47:00,792 INFO L226 Difference]: Without dead ends: 677 [2019-09-09 07:47:00,794 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 07:47:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2019-09-09 07:47:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 458. [2019-09-09 07:47:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2019-09-09 07:47:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 752 transitions. [2019-09-09 07:47:00,885 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 752 transitions. Word has length 165 [2019-09-09 07:47:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:47:00,886 INFO L475 AbstractCegarLoop]: Abstraction has 458 states and 752 transitions. [2019-09-09 07:47:00,886 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 07:47:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 752 transitions. [2019-09-09 07:47:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-09-09 07:47:00,893 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:47:00,894 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 07:47:00,894 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:47:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:47:00,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1859025983, now seen corresponding path program 1 times [2019-09-09 07:47:00,895 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:47:00,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:00,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:47:00,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:00,897 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:47:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:47:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:47:01,143 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:47:01,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 07:47:01,143 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:47:01,145 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 07:47:01,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 07:47:01,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 07:47:01,146 INFO L87 Difference]: Start difference. First operand 458 states and 752 transitions. Second operand 6 states. [2019-09-09 07:47:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:47:02,839 INFO L93 Difference]: Finished difference Result 902 states and 1338 transitions. [2019-09-09 07:47:02,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 07:47:02,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 192 [2019-09-09 07:47:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:47:02,847 INFO L225 Difference]: With dead ends: 902 [2019-09-09 07:47:02,847 INFO L226 Difference]: Without dead ends: 902 [2019-09-09 07:47:02,848 INFO L628 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 [2019-09-09 07:47:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-09-09 07:47:02,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 885. [2019-09-09 07:47:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 885 states. [2019-09-09 07:47:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1304 transitions. [2019-09-09 07:47:02,917 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1304 transitions. Word has length 192 [2019-09-09 07:47:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:47:02,918 INFO L475 AbstractCegarLoop]: Abstraction has 885 states and 1304 transitions. [2019-09-09 07:47:02,918 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 07:47:02,918 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1304 transitions. [2019-09-09 07:47:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-09-09 07:47:02,927 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:47:02,928 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 07:47:02,928 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:47:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:47:02,928 INFO L82 PathProgramCache]: Analyzing trace with hash 905284202, now seen corresponding path program 1 times [2019-09-09 07:47:02,929 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:47:02,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:02,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:47:02,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:02,931 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:47:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:47:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:47:03,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:47:03,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 07:47:03,284 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:47:03,285 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 07:47:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 07:47:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 07:47:03,286 INFO L87 Difference]: Start difference. First operand 885 states and 1304 transitions. Second operand 4 states. [2019-09-09 07:47:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:47:05,262 INFO L93 Difference]: Finished difference Result 2371 states and 3416 transitions. [2019-09-09 07:47:05,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 07:47:05,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 210 [2019-09-09 07:47:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:47:05,292 INFO L225 Difference]: With dead ends: 2371 [2019-09-09 07:47:05,292 INFO L226 Difference]: Without dead ends: 2371 [2019-09-09 07:47:05,293 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 07:47:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2019-09-09 07:47:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1938. [2019-09-09 07:47:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1938 states. [2019-09-09 07:47:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2697 transitions. [2019-09-09 07:47:05,397 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2697 transitions. Word has length 210 [2019-09-09 07:47:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:47:05,409 INFO L475 AbstractCegarLoop]: Abstraction has 1938 states and 2697 transitions. [2019-09-09 07:47:05,409 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 07:47:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2697 transitions. [2019-09-09 07:47:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-09-09 07:47:05,421 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:47:05,421 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 07:47:05,421 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:47:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:47:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash 841120803, now seen corresponding path program 1 times [2019-09-09 07:47:05,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:47:05,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:05,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:47:05,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:05,424 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:47:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:47:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 50 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-09 07:47:05,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 07:47:05,687 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 07:47:05,688 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 227 with the following transitions: [2019-09-09 07:47:05,692 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [71], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [789], [791], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-09-09 07:47:05,769 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 07:47:05,770 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)