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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 06:10:24,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 06:10:24,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 06:10:25,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 06:10:25,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 06:10:25,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 06:10:25,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 06:10:25,058 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 06:10:25,072 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 06:10:25,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 06:10:25,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 06:10:25,073 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 06:10:25,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 06:10:25,074 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 06:10:25,074 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 06:10:25,075 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 06:10:25,075 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 06:10:25,075 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 06:10:25,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 06:10:25,076 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 06:10:25,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 06:10:25,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 06:10:25,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 06:10:25,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 06:10:25,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 06:10:25,077 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 06:10:25,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 06:10:25,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 06:10:25,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 06:10:25,078 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 06:10:25,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 06:10:25,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 06:10:25,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 06:10:25,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 06:10:25,079 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 06:10:25,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 06:10:25,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 06:10:25,079 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 06:10:25,121 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 06:10:25,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 06:10:25,137 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 06:10:25,139 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 06:10:25,139 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 06:10:25,140 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label27.c [2019-09-09 06:10:25,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1730a7797/0f3d9510913a40cd8ef47255f579cd0a/FLAGa1ee22c0a [2019-09-09 06:10:25,693 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 06:10:25,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label27.c [2019-09-09 06:10:25,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1730a7797/0f3d9510913a40cd8ef47255f579cd0a/FLAGa1ee22c0a [2019-09-09 06:10:25,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1730a7797/0f3d9510913a40cd8ef47255f579cd0a [2019-09-09 06:10:25,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 06:10:25,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 06:10:25,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 06:10:25,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 06:10:25,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 06:10:25,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:10:25" (1/1) ... [2019-09-09 06:10:25,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1ae92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:25, skipping insertion in model container [2019-09-09 06:10:25,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:10:25" (1/1) ... [2019-09-09 06:10:25,987 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 06:10:26,030 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 06:10:26,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:10:26,585 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 06:10:26,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:10:26,732 INFO L192 MainTranslator]: Completed translation [2019-09-09 06:10:26,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26 WrapperNode [2019-09-09 06:10:26,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 06:10:26,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 06:10:26,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 06:10:26,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 06:10:26,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26" (1/1) ... [2019-09-09 06:10:26,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26" (1/1) ... [2019-09-09 06:10:26,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26" (1/1) ... [2019-09-09 06:10:26,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26" (1/1) ... [2019-09-09 06:10:26,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26" (1/1) ... [2019-09-09 06:10:26,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26" (1/1) ... [2019-09-09 06:10:26,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26" (1/1) ... [2019-09-09 06:10:26,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 06:10:26,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 06:10:26,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 06:10:26,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 06:10:26,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26" (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 06:10:26,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 06:10:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 06:10:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 06:10:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 06:10:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 06:10:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 06:10:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 06:10:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 06:10:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 06:10:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 06:10:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 06:10:28,091 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 06:10:28,092 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 06:10:28,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:10:28 BoogieIcfgContainer [2019-09-09 06:10:28,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 06:10:28,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 06:10:28,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 06:10:28,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 06:10:28,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:10:25" (1/3) ... [2019-09-09 06:10:28,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca9b2f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:10:28, skipping insertion in model container [2019-09-09 06:10:28,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:10:26" (2/3) ... [2019-09-09 06:10:28,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca9b2f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:10:28, skipping insertion in model container [2019-09-09 06:10:28,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:10:28" (3/3) ... [2019-09-09 06:10:28,115 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label27.c [2019-09-09 06:10:28,129 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 06:10:28,141 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 06:10:28,162 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 06:10:28,196 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 06:10:28,197 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 06:10:28,198 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 06:10:28,198 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 06:10:28,198 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 06:10:28,198 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 06:10:28,198 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 06:10:28,199 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 06:10:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-09-09 06:10:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-09 06:10:28,257 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:28,259 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] [2019-09-09 06:10:28,261 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:28,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2139727354, now seen corresponding path program 1 times [2019-09-09 06:10:28,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:28,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:28,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:28,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:28,316 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:28,806 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 06:10:28,808 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:10:28,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 06:10:28,809 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:10:28,818 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 06:10:28,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 06:10:28,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 06:10:28,837 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 4 states. [2019-09-09 06:10:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:10:30,144 INFO L93 Difference]: Finished difference Result 497 states and 751 transitions. [2019-09-09 06:10:30,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 06:10:30,146 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-09-09 06:10:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:10:30,164 INFO L225 Difference]: With dead ends: 497 [2019-09-09 06:10:30,164 INFO L226 Difference]: Without dead ends: 413 [2019-09-09 06:10:30,166 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 06:10:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2019-09-09 06:10:30,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 278. [2019-09-09 06:10:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-09-09 06:10:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-09-09 06:10:30,252 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 94 [2019-09-09 06:10:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:10:30,253 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-09-09 06:10:30,254 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 06:10:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-09-09 06:10:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-09 06:10:30,264 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:30,264 INFO L399 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] [2019-09-09 06:10:30,265 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1455606109, now seen corresponding path program 1 times [2019-09-09 06:10:30,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:30,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:30,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:30,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:30,275 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:10:30,432 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:10:30,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 06:10:30,432 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:10:30,434 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 06:10:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 06:10:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 06:10:30,435 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-09-09 06:10:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:10:31,321 INFO L93 Difference]: Finished difference Result 568 states and 829 transitions. [2019-09-09 06:10:31,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 06:10:31,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-09-09 06:10:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:10:31,329 INFO L225 Difference]: With dead ends: 568 [2019-09-09 06:10:31,329 INFO L226 Difference]: Without dead ends: 568 [2019-09-09 06:10:31,330 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 06:10:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-09-09 06:10:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-09-09 06:10:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-09-09 06:10:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 799 transitions. [2019-09-09 06:10:31,372 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 799 transitions. Word has length 104 [2019-09-09 06:10:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:10:31,373 INFO L475 AbstractCegarLoop]: Abstraction has 556 states and 799 transitions. [2019-09-09 06:10:31,373 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 06:10:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 799 transitions. [2019-09-09 06:10:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-09 06:10:31,377 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:31,378 INFO L399 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] [2019-09-09 06:10:31,378 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1089398559, now seen corresponding path program 1 times [2019-09-09 06:10:31,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:31,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:31,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:31,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:31,380 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:10:31,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:10:31,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 06:10:31,516 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:10:31,516 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 06:10:31,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 06:10:31,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:10:31,517 INFO L87 Difference]: Start difference. First operand 556 states and 799 transitions. Second operand 3 states. [2019-09-09 06:10:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:10:32,075 INFO L93 Difference]: Finished difference Result 963 states and 1344 transitions. [2019-09-09 06:10:32,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 06:10:32,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2019-09-09 06:10:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:10:32,083 INFO L225 Difference]: With dead ends: 963 [2019-09-09 06:10:32,083 INFO L226 Difference]: Without dead ends: 963 [2019-09-09 06:10:32,084 INFO L628 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 [2019-09-09 06:10:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2019-09-09 06:10:32,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2019-09-09 06:10:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2019-09-09 06:10:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1344 transitions. [2019-09-09 06:10:32,121 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1344 transitions. Word has length 105 [2019-09-09 06:10:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:10:32,122 INFO L475 AbstractCegarLoop]: Abstraction has 963 states and 1344 transitions. [2019-09-09 06:10:32,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 06:10:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1344 transitions. [2019-09-09 06:10:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-09 06:10:32,127 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:32,127 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 06:10:32,127 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:32,128 INFO L82 PathProgramCache]: Analyzing trace with hash -414370937, now seen corresponding path program 1 times [2019-09-09 06:10:32,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:32,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:32,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:32,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:32,129 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:10:32,257 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:10:32,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 06:10:32,258 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:10:32,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 06:10:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 06:10:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 06:10:32,259 INFO L87 Difference]: Start difference. First operand 963 states and 1344 transitions. Second operand 6 states. [2019-09-09 06:10:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:10:33,137 INFO L93 Difference]: Finished difference Result 1545 states and 2179 transitions. [2019-09-09 06:10:33,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 06:10:33,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-09-09 06:10:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:10:33,149 INFO L225 Difference]: With dead ends: 1545 [2019-09-09 06:10:33,149 INFO L226 Difference]: Without dead ends: 1545 [2019-09-09 06:10:33,150 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 06:10:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2019-09-09 06:10:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1527. [2019-09-09 06:10:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2019-09-09 06:10:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2111 transitions. [2019-09-09 06:10:33,235 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2111 transitions. Word has length 117 [2019-09-09 06:10:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:10:33,236 INFO L475 AbstractCegarLoop]: Abstraction has 1527 states and 2111 transitions. [2019-09-09 06:10:33,236 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 06:10:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2111 transitions. [2019-09-09 06:10:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-09 06:10:33,241 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:33,242 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 06:10:33,242 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:33,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:33,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1750271410, now seen corresponding path program 1 times [2019-09-09 06:10:33,243 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:33,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:33,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:33,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:33,244 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:10:33,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 06:10:33,345 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 06:10:33,346 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 129 with the following transitions: [2019-09-09 06:10:33,348 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [65], [66], [70], [74], [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], [397], [399], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-09-09 06:10:33,402 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 06:10:33,402 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)