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/Problem15_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:12:46,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:12:46,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:12:47,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 21:12:47,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:12:47,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:12:47,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:12:47,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:12:47,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:12:47,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:12:47,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:12:47,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:12:47,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:12:47,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:12:47,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:12:47,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:12:47,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:12:47,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 21:12:47,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 21:12:47,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 21:12:47,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 21:12:47,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 21:12:47,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 21:12:47,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 21:12:47,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 21:12:47,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 21:12:47,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 21:12:47,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 21:12:47,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 21:12:47,058 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:12:47,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:12:47,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:12:47,059 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:12:47,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:12:47,060 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:12:47,061 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:12:47,061 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:12:47,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:12:47,061 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:12:47,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:12:47,062 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:12:47,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:12:47,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:12:47,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:12:47,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:12:47,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:12:47,063 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:12:47,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:12:47,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:12:47,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:12:47,064 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:12:47,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:12:47,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:12:47,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:12:47,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:12:47,065 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:12:47,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:12:47,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:12:47,066 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:12:47,094 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:12:47,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:12:47,112 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:12:47,113 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:12:47,113 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:12:47,114 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-10-02 21:12:47,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236a00114/708f8031215a4b9d89d7e04764129111/FLAG53f75c098 [2019-10-02 21:12:47,833 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:12:47,834 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-10-02 21:12:47,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236a00114/708f8031215a4b9d89d7e04764129111/FLAG53f75c098 [2019-10-02 21:12:48,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236a00114/708f8031215a4b9d89d7e04764129111 [2019-10-02 21:12:48,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:12:48,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:12:48,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:12:48,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:12:48,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:12:48,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:12:48" (1/1) ... [2019-10-02 21:12:48,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a8eca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:48, skipping insertion in model container [2019-10-02 21:12:48,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:12:48" (1/1) ... [2019-10-02 21:12:48,049 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:12:48,126 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:12:48,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:12:48,981 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:12:49,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:12:49,383 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:12:49,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49 WrapperNode [2019-10-02 21:12:49,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:12:49,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:12:49,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:12:49,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:12:49,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49" (1/1) ... [2019-10-02 21:12:49,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49" (1/1) ... [2019-10-02 21:12:49,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49" (1/1) ... [2019-10-02 21:12:49,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49" (1/1) ... [2019-10-02 21:12:49,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49" (1/1) ... [2019-10-02 21:12:49,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49" (1/1) ... [2019-10-02 21:12:49,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49" (1/1) ... [2019-10-02 21:12:49,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:12:49,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:12:49,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:12:49,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:12:49,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:12:49,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:12:49,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:12:49,707 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:12:49,707 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:12:49,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:12:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:12:49,708 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:12:49,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:12:49,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:12:49,708 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:12:49,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:12:49,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:12:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:12:52,939 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:12:52,940 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:12:52,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:12:52 BoogieIcfgContainer [2019-10-02 21:12:52,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:12:52,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:12:52,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:12:52,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:12:52,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:12:48" (1/3) ... [2019-10-02 21:12:52,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75236027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:12:52, skipping insertion in model container [2019-10-02 21:12:52,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:12:49" (2/3) ... [2019-10-02 21:12:52,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75236027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:12:52, skipping insertion in model container [2019-10-02 21:12:52,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:12:52" (3/3) ... [2019-10-02 21:12:52,950 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label54.c [2019-10-02 21:12:52,960 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:12:52,970 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:12:52,986 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:12:53,018 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:12:53,018 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:12:53,018 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:12:53,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:12:53,019 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:12:53,019 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:12:53,019 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:12:53,019 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:12:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-02 21:12:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-02 21:12:53,064 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:12:53,065 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:12:53,067 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:12:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:12:53,073 INFO L82 PathProgramCache]: Analyzing trace with hash 54256576, now seen corresponding path program 1 times [2019-10-02 21:12:53,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:12:53,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:12:53,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:12:53,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:12:53,131 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:12:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:12:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:12:53,363 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:12:53,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 21:12:53,363 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:12:53,369 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 21:12:53,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 21:12:53,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:12:53,387 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 3 states. [2019-10-02 21:12:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:12:56,150 INFO L93 Difference]: Finished difference Result 758 states and 1268 transitions. [2019-10-02 21:12:56,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 21:12:56,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-02 21:12:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:12:56,177 INFO L225 Difference]: With dead ends: 758 [2019-10-02 21:12:56,178 INFO L226 Difference]: Without dead ends: 690 [2019-10-02 21:12:56,180 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:12:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-02 21:12:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-02 21:12:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-02 21:12:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1151 transitions. [2019-10-02 21:12:56,308 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1151 transitions. Word has length 46 [2019-10-02 21:12:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:12:56,308 INFO L475 AbstractCegarLoop]: Abstraction has 690 states and 1151 transitions. [2019-10-02 21:12:56,310 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 21:12:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1151 transitions. [2019-10-02 21:12:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-02 21:12:56,328 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:12:56,329 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:12:56,329 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:12:56,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:12:56,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1294252235, now seen corresponding path program 1 times [2019-10-02 21:12:56,330 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:12:56,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:12:56,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:12:56,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:12:56,334 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:12:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:12:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:12:56,669 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:12:56,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 21:12:56,669 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:12:56,671 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 21:12:56,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 21:12:56,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:12:56,672 INFO L87 Difference]: Start difference. First operand 690 states and 1151 transitions. Second operand 5 states. [2019-10-02 21:13:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:13:03,624 INFO L93 Difference]: Finished difference Result 2562 states and 3980 transitions. [2019-10-02 21:13:03,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 21:13:03,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2019-10-02 21:13:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:13:03,647 INFO L225 Difference]: With dead ends: 2562 [2019-10-02 21:13:03,647 INFO L226 Difference]: Without dead ends: 2562 [2019-10-02 21:13:03,648 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:13:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2019-10-02 21:13:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2562. [2019-10-02 21:13:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2562 states. [2019-10-02 21:13:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 3980 transitions. [2019-10-02 21:13:03,763 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 3980 transitions. Word has length 126 [2019-10-02 21:13:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:13:03,767 INFO L475 AbstractCegarLoop]: Abstraction has 2562 states and 3980 transitions. [2019-10-02 21:13:03,767 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 21:13:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 3980 transitions. [2019-10-02 21:13:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-02 21:13:03,772 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:13:03,773 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:13:03,773 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:13:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:13:03,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1175711612, now seen corresponding path program 1 times [2019-10-02 21:13:03,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:13:03,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:13:03,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:13:03,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:13:03,778 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:13:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:13:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:13:04,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:13:04,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:13:04,093 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:13:04,098 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:13:04,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:13:04,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:13:04,099 INFO L87 Difference]: Start difference. First operand 2562 states and 3980 transitions. Second operand 6 states. [2019-10-02 21:13:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:13:07,441 INFO L93 Difference]: Finished difference Result 3249 states and 4867 transitions. [2019-10-02 21:13:07,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 21:13:07,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-02 21:13:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:13:07,465 INFO L225 Difference]: With dead ends: 3249 [2019-10-02 21:13:07,466 INFO L226 Difference]: Without dead ends: 3249 [2019-10-02 21:13:07,469 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-02 21:13:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2019-10-02 21:13:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2620. [2019-10-02 21:13:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2620 states. [2019-10-02 21:13:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 3834 transitions. [2019-10-02 21:13:07,574 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 3834 transitions. Word has length 145 [2019-10-02 21:13:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:13:07,575 INFO L475 AbstractCegarLoop]: Abstraction has 2620 states and 3834 transitions. [2019-10-02 21:13:07,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:13:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 3834 transitions. [2019-10-02 21:13:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-02 21:13:07,580 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:13:07,580 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 21:13:07,581 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:13:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:13:07,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1689745416, now seen corresponding path program 1 times [2019-10-02 21:13:07,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:13:07,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:13:07,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:13:07,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:13:07,585 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:13:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:13:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:13:07,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:13:07,861 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:13:07,862 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 215 with the following transitions: [2019-10-02 21:13:07,865 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [699], [704], [706], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-10-02 21:13:07,911 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:13:07,911 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:13:10,740 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:13:10,743 INFO L272 AbstractInterpreter]: Visited 102 different actions 102 times. Never merged. Never widened. Performed 243 root evaluator evaluations with a maximum evaluation depth of 13. Performed 243 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 21:13:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:13:10,750 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:13:12,686 INFO L227 lantSequenceWeakener]: Weakened 193 states. On average, predicates are now at 78.08% of their original sizes. [2019-10-02 21:13:12,686 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:13:12,761 INFO L420 sIntCurrentIteration]: We unified 213 AI predicates to 213 [2019-10-02 21:13:12,761 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:13:12,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:13:12,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-10-02 21:13:12,763 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:13:12,763 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 21:13:12,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 21:13:12,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-02 21:13:12,764 INFO L87 Difference]: Start difference. First operand 2620 states and 3834 transitions. Second operand 11 states. [2019-10-02 21:13:22,347 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 21:23:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:23:28,680 INFO L93 Difference]: Finished difference Result 2931 states and 4158 transitions. [2019-10-02 21:23:28,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 21:23:28,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 214 [2019-10-02 21:23:28,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:23:28,694 INFO L225 Difference]: With dead ends: 2931 [2019-10-02 21:23:28,694 INFO L226 Difference]: Without dead ends: 2931 [2019-10-02 21:23:28,695 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-02 21:23:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2019-10-02 21:23:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2927. [2019-10-02 21:23:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2927 states. [2019-10-02 21:23:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4150 transitions. [2019-10-02 21:23:28,755 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4150 transitions. Word has length 214 [2019-10-02 21:23:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:23:28,756 INFO L475 AbstractCegarLoop]: Abstraction has 2927 states and 4150 transitions. [2019-10-02 21:23:28,756 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 21:23:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4150 transitions. [2019-10-02 21:23:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-02 21:23:28,760 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:23:28,760 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:23:28,760 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:23:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:23:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash -714862342, now seen corresponding path program 1 times [2019-10-02 21:23:28,761 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:23:28,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:23:28,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:23:28,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:23:28,762 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:23:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:23:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 79 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-02 21:23:29,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:23:29,009 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:23:29,009 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 241 with the following transitions: [2019-10-02 21:23:29,009 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [699], [704], [706], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-10-02 21:23:29,014 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:23:29,014 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:23:30,394 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 21:23:31,191 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:23:31,192 INFO L272 AbstractInterpreter]: Visited 105 different actions 205 times. Merged at 4 different actions 5 times. Never widened. Performed 458 root evaluator evaluations with a maximum evaluation depth of 13. Performed 458 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 21:23:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:23:31,192 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:23:32,496 INFO L227 lantSequenceWeakener]: Weakened 235 states. On average, predicates are now at 77.81% of their original sizes. [2019-10-02 21:23:32,496 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:23:32,605 INFO L420 sIntCurrentIteration]: We unified 239 AI predicates to 239 [2019-10-02 21:23:32,605 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:23:32,606 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:23:32,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2019-10-02 21:23:32,606 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:23:32,607 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 21:23:32,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 21:23:32,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-02 21:23:32,608 INFO L87 Difference]: Start difference. First operand 2927 states and 4150 transitions. Second operand 12 states.