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/Problem17_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:10:50,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:10:50,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:10:50,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:10:50,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 21:10:50,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 21:10:50,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 21:10:50,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 21:10:50,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 21:10:50,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 21:10:50,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 21:10:50,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 21:10:50,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 21:10:50,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 21:10:50,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 21:10:50,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 21:10:50,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 21:10:50,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:10:50,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:10:50,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:10:50,953 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 21:10:50,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:10:50,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:10:50,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:10:50,980 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:10:50,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:10:50,981 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:10:50,981 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:10:50,981 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:10:50,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:10:50,982 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:10:50,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:10:50,983 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:10:50,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:10:50,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:10:50,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:10:50,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:10:50,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:10:50,984 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:10:50,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:10:50,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:10:50,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:10:50,985 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:10:50,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:10:50,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:10:50,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:10:50,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:10:50,986 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:10:50,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:10:50,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:10:50,986 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:10:51,016 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:10:51,028 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:10:51,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:10:51,032 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:10:51,033 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:10:51,033 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label23.c [2019-09-09 21:10:51,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcebda979/65121c656310404e9766e9dac3bc379c/FLAGb3ca5a7ae [2019-09-09 21:10:51,854 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:10:51,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label23.c [2019-09-09 21:10:51,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcebda979/65121c656310404e9766e9dac3bc379c/FLAGb3ca5a7ae [2019-09-09 21:10:51,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcebda979/65121c656310404e9766e9dac3bc379c [2019-09-09 21:10:51,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:10:51,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:10:51,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:10:51,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:10:51,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:10:51,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:10:51" (1/1) ... [2019-09-09 21:10:51,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ee54a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:51, skipping insertion in model container [2019-09-09 21:10:51,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:10:51" (1/1) ... [2019-09-09 21:10:51,970 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:10:52,075 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:10:53,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:10:53,171 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:10:53,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:10:53,693 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:10:53,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53 WrapperNode [2019-09-09 21:10:53,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:10:53,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:10:53,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:10:53,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:10:53,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53" (1/1) ... [2019-09-09 21:10:53,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53" (1/1) ... [2019-09-09 21:10:53,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53" (1/1) ... [2019-09-09 21:10:53,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53" (1/1) ... [2019-09-09 21:10:53,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53" (1/1) ... [2019-09-09 21:10:53,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53" (1/1) ... [2019-09-09 21:10:53,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53" (1/1) ... [2019-09-09 21:10:53,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:10:53,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:10:53,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:10:53,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:10:53,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53" (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 21:10:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:10:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:10:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:10:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:10:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:10:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:10:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:10:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:10:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:10:58,175 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:10:58,176 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:10:58,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:10:58 BoogieIcfgContainer [2019-09-09 21:10:58,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:10:58,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:10:58,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:10:58,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:10:58,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:10:51" (1/3) ... [2019-09-09 21:10:58,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c2e7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:10:58, skipping insertion in model container [2019-09-09 21:10:58,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:10:53" (2/3) ... [2019-09-09 21:10:58,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c2e7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:10:58, skipping insertion in model container [2019-09-09 21:10:58,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:10:58" (3/3) ... [2019-09-09 21:10:58,187 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label23.c [2019-09-09 21:10:58,197 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:10:58,207 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:10:58,225 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:10:58,260 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:10:58,260 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:10:58,260 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:10:58,261 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:10:58,261 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:10:58,261 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:10:58,261 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:10:58,261 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:10:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:10:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-09 21:10:58,308 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:10:58,309 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] [2019-09-09 21:10:58,311 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:10:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:10:58,318 INFO L82 PathProgramCache]: Analyzing trace with hash -722690823, now seen corresponding path program 1 times [2019-09-09 21:10:58,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:10:58,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:10:58,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:10:58,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:10:58,391 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:10:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:10:58,646 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 21:10:58,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:10:58,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:10:58,649 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:10:58,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:10:58,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:10:58,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:10:58,675 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:11:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:11:05,017 INFO L93 Difference]: Finished difference Result 1532 states and 2236 transitions. [2019-09-09 21:11:05,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:11:05,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-09-09 21:11:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:11:05,053 INFO L225 Difference]: With dead ends: 1532 [2019-09-09 21:11:05,054 INFO L226 Difference]: Without dead ends: 1447 [2019-09-09 21:11:05,056 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:11:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2019-09-09 21:11:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1440. [2019-09-09 21:11:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2019-09-09 21:11:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2109 transitions. [2019-09-09 21:11:05,198 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2109 transitions. Word has length 27 [2019-09-09 21:11:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:11:05,202 INFO L475 AbstractCegarLoop]: Abstraction has 1440 states and 2109 transitions. [2019-09-09 21:11:05,202 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:11:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2109 transitions. [2019-09-09 21:11:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-09 21:11:05,208 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:11:05,209 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] [2019-09-09 21:11:05,210 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:11:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:11:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash 33614273, now seen corresponding path program 1 times [2019-09-09 21:11:05,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:11:05,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:11:05,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:11:05,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:11:05,214 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:11:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:11:05,442 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 21:11:05,443 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:11:05,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:11:05,443 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:11:05,447 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:11:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:11:05,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:11:05,449 INFO L87 Difference]: Start difference. First operand 1440 states and 2109 transitions. Second operand 4 states. [2019-09-09 21:11:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:11:15,300 INFO L93 Difference]: Finished difference Result 4064 states and 5464 transitions. [2019-09-09 21:11:15,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:11:15,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2019-09-09 21:11:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:11:15,326 INFO L225 Difference]: With dead ends: 4064 [2019-09-09 21:11:15,327 INFO L226 Difference]: Without dead ends: 4064 [2019-09-09 21:11:15,328 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 21:11:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2019-09-09 21:11:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 4060. [2019-09-09 21:11:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4060 states. [2019-09-09 21:11:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 5456 transitions. [2019-09-09 21:11:15,455 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 5456 transitions. Word has length 101 [2019-09-09 21:11:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:11:15,456 INFO L475 AbstractCegarLoop]: Abstraction has 4060 states and 5456 transitions. [2019-09-09 21:11:15,456 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:11:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 5456 transitions. [2019-09-09 21:11:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-09 21:11:15,475 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:11:15,476 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, 1, 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 21:11:15,476 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:11:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:11:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash 44923374, now seen corresponding path program 1 times [2019-09-09 21:11:15,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:11:15,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:11:15,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:11:15,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:11:15,480 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:11:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:11:15,753 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 21:11:15,753 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:11:15,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:11:15,754 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:11:15,754 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:11:15,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:11:15,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:11:15,755 INFO L87 Difference]: Start difference. First operand 4060 states and 5456 transitions. Second operand 6 states. [2019-09-09 21:11:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:11:21,060 INFO L93 Difference]: Finished difference Result 8161 states and 10876 transitions. [2019-09-09 21:11:21,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:11:21,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-09-09 21:11:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:11:21,140 INFO L225 Difference]: With dead ends: 8161 [2019-09-09 21:11:21,141 INFO L226 Difference]: Without dead ends: 8161 [2019-09-09 21:11:21,144 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 21:11:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2019-09-09 21:11:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 8115. [2019-09-09 21:11:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8115 states. [2019-09-09 21:11:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8115 states to 8115 states and 10603 transitions. [2019-09-09 21:11:21,404 INFO L78 Accepts]: Start accepts. Automaton has 8115 states and 10603 transitions. Word has length 142 [2019-09-09 21:11:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:11:21,406 INFO L475 AbstractCegarLoop]: Abstraction has 8115 states and 10603 transitions. [2019-09-09 21:11:21,406 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:11:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 8115 states and 10603 transitions. [2019-09-09 21:11:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-09-09 21:11:21,421 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:11:21,421 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 21:11:21,422 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:11:21,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:11:21,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1402566964, now seen corresponding path program 1 times [2019-09-09 21:11:21,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:11:21,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:11:21,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:11:21,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:11:21,424 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:11:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:11:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-09 21:11:21,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:11:21,707 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:11:21,708 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 194 with the following transitions: [2019-09-09 21:11:21,710 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [834], [836], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1302], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:11:21,792 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:11:21,792 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:11:25,076 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 21:11:31,053 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:11:31,056 INFO L272 AbstractInterpreter]: Visited 100 different actions 195 times. Merged at 4 different actions 5 times. Never widened. Performed 426 root evaluator evaluations with a maximum evaluation depth of 15. Performed 426 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 21:11:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:11:31,060 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:11:34,387 INFO L227 lantSequenceWeakener]: Weakened 190 states. On average, predicates are now at 75.12% of their original sizes. [2019-09-09 21:11:34,388 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:11:34,511 INFO L420 sIntCurrentIteration]: We unified 192 AI predicates to 192 [2019-09-09 21:11:34,512 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:11:34,512 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:11:34,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 21:11:34,513 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:11:34,514 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 21:11:34,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 21:11:34,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 21:11:34,515 INFO L87 Difference]: Start difference. First operand 8115 states and 10603 transitions. Second operand 12 states.