java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:24:49,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:24:49,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:24:49,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 14:24:49,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 14:24:49,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 14:24:49,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 14:24:49,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 14:24:49,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 14:24:49,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 14:24:49,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 14:24:49,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 14:24:49,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 14:24:49,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 14:24:49,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 14:24:49,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 14:24:49,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 14:24:49,964 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 14:24:49,982 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:24:49,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:24:49,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:24:49,986 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:24:49,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:24:49,987 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:24:49,989 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:24:49,989 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:24:49,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:24:49,989 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:24:49,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:24:49,991 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:24:49,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:24:49,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:24:49,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:24:49,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:24:49,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:24:49,993 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:24:49,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:24:49,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:24:49,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:24:49,993 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:24:49,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:24:49,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:24:49,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:24:49,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:24:49,994 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:24:49,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:24:49,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:24:49,995 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:24:50,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:24:50,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:24:50,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:24:50,044 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:24:50,044 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:24:50,045 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label33.c [2019-09-09 14:24:50,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f81e0d8b/fee9942f0ce74fe498a0e2668f8cb6ba/FLAG717740a69 [2019-09-09 14:24:50,702 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:24:50,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label33.c [2019-09-09 14:24:50,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f81e0d8b/fee9942f0ce74fe498a0e2668f8cb6ba/FLAG717740a69 [2019-09-09 14:24:50,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f81e0d8b/fee9942f0ce74fe498a0e2668f8cb6ba [2019-09-09 14:24:50,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:24:50,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:24:50,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:24:50,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:24:50,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:24:50,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:24:50" (1/1) ... [2019-09-09 14:24:50,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e80a95e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:50, skipping insertion in model container [2019-09-09 14:24:50,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:24:50" (1/1) ... [2019-09-09 14:24:50,965 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:24:51,027 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:24:51,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:24:51,448 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:24:51,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:24:51,700 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:24:51,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51 WrapperNode [2019-09-09 14:24:51,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:24:51,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:24:51,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:24:51,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:24:51,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51" (1/1) ... [2019-09-09 14:24:51,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51" (1/1) ... [2019-09-09 14:24:51,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51" (1/1) ... [2019-09-09 14:24:51,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51" (1/1) ... [2019-09-09 14:24:51,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51" (1/1) ... [2019-09-09 14:24:51,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51" (1/1) ... [2019-09-09 14:24:51,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51" (1/1) ... [2019-09-09 14:24:51,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:24:51,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:24:51,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:24:51,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:24:51,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51" (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 14:24:51,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:24:51,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:24:51,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:24:51,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:24:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:24:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:24:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:24:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:24:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:24:51,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:24:51,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:24:53,072 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:24:53,072 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:24:53,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:24:53 BoogieIcfgContainer [2019-09-09 14:24:53,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:24:53,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:24:53,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:24:53,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:24:53,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:24:50" (1/3) ... [2019-09-09 14:24:53,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc8b1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:24:53, skipping insertion in model container [2019-09-09 14:24:53,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:24:51" (2/3) ... [2019-09-09 14:24:53,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc8b1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:24:53, skipping insertion in model container [2019-09-09 14:24:53,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:24:53" (3/3) ... [2019-09-09 14:24:53,082 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label33.c [2019-09-09 14:24:53,092 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:24:53,101 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:24:53,117 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:24:53,144 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:24:53,144 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:24:53,145 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:24:53,145 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:24:53,145 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:24:53,145 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:24:53,145 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:24:53,145 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:24:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:24:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-09 14:24:53,180 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:24:53,181 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] [2019-09-09 14:24:53,183 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:24:53,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:24:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash -878124393, now seen corresponding path program 1 times [2019-09-09 14:24:53,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:24:53,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:24:53,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:24:53,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:24:53,238 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:24:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:24:53,538 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 14:24:53,541 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:24:53,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:24:53,542 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:24:53,548 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:24:53,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:24:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:24:53,566 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-09-09 14:24:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:24:55,110 INFO L93 Difference]: Finished difference Result 524 states and 762 transitions. [2019-09-09 14:24:55,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:24:55,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-09-09 14:24:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:24:55,131 INFO L225 Difference]: With dead ends: 524 [2019-09-09 14:24:55,131 INFO L226 Difference]: Without dead ends: 437 [2019-09-09 14:24:55,133 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 14:24:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-09-09 14:24:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-09-09 14:24:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-09-09 14:24:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 426 transitions. [2019-09-09 14:24:55,206 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 426 transitions. Word has length 50 [2019-09-09 14:24:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:24:55,207 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 426 transitions. [2019-09-09 14:24:55,207 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:24:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 426 transitions. [2019-09-09 14:24:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-09 14:24:55,213 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:24:55,214 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:24:55,214 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:24:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:24:55,215 INFO L82 PathProgramCache]: Analyzing trace with hash -558558894, now seen corresponding path program 1 times [2019-09-09 14:24:55,215 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:24:55,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:24:55,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:24:55,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:24:55,216 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:24:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:24:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:24:55,438 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:24:55,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:24:55,438 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:24:55,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:24:55,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:24:55,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:24:55,441 INFO L87 Difference]: Start difference. First operand 294 states and 426 transitions. Second operand 6 states. [2019-09-09 14:24:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:24:56,393 INFO L93 Difference]: Finished difference Result 602 states and 885 transitions. [2019-09-09 14:24:56,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:24:56,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2019-09-09 14:24:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:24:56,400 INFO L225 Difference]: With dead ends: 602 [2019-09-09 14:24:56,401 INFO L226 Difference]: Without dead ends: 602 [2019-09-09 14:24:56,402 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 14:24:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-09-09 14:24:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2019-09-09 14:24:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-09-09 14:24:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 855 transitions. [2019-09-09 14:24:56,457 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 855 transitions. Word has length 124 [2019-09-09 14:24:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:24:56,458 INFO L475 AbstractCegarLoop]: Abstraction has 590 states and 855 transitions. [2019-09-09 14:24:56,458 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:24:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 855 transitions. [2019-09-09 14:24:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-09 14:24:56,465 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:24:56,466 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:24:56,466 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:24:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:24:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash -197075182, now seen corresponding path program 1 times [2019-09-09 14:24:56,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:24:56,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:24:56,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:24:56,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:24:56,468 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:24:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:24:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 14:24:56,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:24:56,707 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:24:56,708 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 157 with the following transitions: [2019-09-09 14:24:56,712 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:24:56,779 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:24:56,779 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:25:19,538 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:25:19,541 INFO L272 AbstractInterpreter]: Visited 110 different actions 110 times. Never merged. Never widened. Performed 147 root evaluator evaluations with a maximum evaluation depth of 16. Performed 147 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 14:25:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:25:19,547 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:25:36,075 INFO L227 lantSequenceWeakener]: Weakened 150 states. On average, predicates are now at 73.5% of their original sizes. [2019-09-09 14:25:36,076 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:25:36,100 INFO L420 sIntCurrentIteration]: We unified 155 AI predicates to 155 [2019-09-09 14:25:36,101 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:25:36,102 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:25:36,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-09-09 14:25:36,102 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:25:36,103 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 14:25:36,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 14:25:36,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 14:25:36,104 INFO L87 Difference]: Start difference. First operand 590 states and 855 transitions. Second operand 7 states. [2019-09-09 14:25:40,038 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:28:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:28:22,802 INFO L93 Difference]: Finished difference Result 734 states and 1006 transitions. [2019-09-09 14:28:22,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:28:22,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 156 [2019-09-09 14:28:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:28:22,808 INFO L225 Difference]: With dead ends: 734 [2019-09-09 14:28:22,808 INFO L226 Difference]: Without dead ends: 734 [2019-09-09 14:28:22,808 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-09-09 14:28:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-09-09 14:28:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 733. [2019-09-09 14:28:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2019-09-09 14:28:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1005 transitions. [2019-09-09 14:28:22,838 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1005 transitions. Word has length 156 [2019-09-09 14:28:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:28:22,839 INFO L475 AbstractCegarLoop]: Abstraction has 733 states and 1005 transitions. [2019-09-09 14:28:22,839 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 14:28:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1005 transitions. [2019-09-09 14:28:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-09-09 14:28:22,845 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:28:22,845 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-09-09 14:28:22,846 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:28:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:28:22,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2095990699, now seen corresponding path program 1 times [2019-09-09 14:28:22,846 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:28:22,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:28:22,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:28:22,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:28:22,848 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:28:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:28:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-09-09 14:28:23,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:28:23,152 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:28:23,153 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 227 with the following transitions: [2019-09-09 14:28:23,153 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:28:23,168 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:28:23,170 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:28:25,638 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:29:26,468 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:29:26,470 INFO L272 AbstractInterpreter]: Visited 114 different actions 222 times. Merged at 4 different actions 4 times. Never widened. Performed 437 root evaluator evaluations with a maximum evaluation depth of 16. Performed 437 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:29:26,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:29:26,470 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:30:05,300 INFO L227 lantSequenceWeakener]: Weakened 223 states. On average, predicates are now at 73.3% of their original sizes. [2019-09-09 14:30:05,300 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:30:05,403 INFO L420 sIntCurrentIteration]: We unified 225 AI predicates to 225 [2019-09-09 14:30:05,404 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:30:05,404 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:30:05,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [4] total 13 [2019-09-09 14:30:05,404 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:30:05,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:30:05,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:30:05,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:30:05,406 INFO L87 Difference]: Start difference. First operand 733 states and 1005 transitions. Second operand 11 states. [2019-09-09 14:34:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:34:31,397 INFO L93 Difference]: Finished difference Result 880 states and 1164 transitions. [2019-09-09 14:34:31,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 14:34:31,397 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 226 [2019-09-09 14:34:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:34:31,403 INFO L225 Difference]: With dead ends: 880 [2019-09-09 14:34:31,404 INFO L226 Difference]: Without dead ends: 880 [2019-09-09 14:34:31,404 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 14:34:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-09-09 14:34:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 878. [2019-09-09 14:34:31,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2019-09-09 14:34:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1162 transitions. [2019-09-09 14:34:31,428 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1162 transitions. Word has length 226 [2019-09-09 14:34:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:34:31,429 INFO L475 AbstractCegarLoop]: Abstraction has 878 states and 1162 transitions. [2019-09-09 14:34:31,429 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:34:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1162 transitions. [2019-09-09 14:34:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-09-09 14:34:31,434 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:34:31,434 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-09-09 14:34:31,434 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:34:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:34:31,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1902857328, now seen corresponding path program 1 times [2019-09-09 14:34:31,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:34:31,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:34:31,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:34:31,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:34:31,436 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:34:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:34:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-09-09 14:34:31,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:34:31,650 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:34:31,650 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2019-09-09 14:34:31,652 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:34:31,663 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:34:31,663 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:34:41,588 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:35:14,397 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:35:14,398 INFO L272 AbstractInterpreter]: Visited 114 different actions 221 times. Merged at 3 different actions 3 times. Never widened. Performed 355 root evaluator evaluations with a maximum evaluation depth of 16. Performed 355 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:35:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:35:14,398 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:35:40,649 INFO L227 lantSequenceWeakener]: Weakened 232 states. On average, predicates are now at 73.28% of their original sizes. [2019-09-09 14:35:40,650 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:35:40,736 INFO L420 sIntCurrentIteration]: We unified 234 AI predicates to 234 [2019-09-09 14:35:40,736 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:35:40,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:35:40,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-09-09 14:35:40,737 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:35:40,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:35:40,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:35:40,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:35:40,738 INFO L87 Difference]: Start difference. First operand 878 states and 1162 transitions. Second operand 11 states. [2019-09-09 14:38:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:38:56,465 INFO L93 Difference]: Finished difference Result 1045 states and 1341 transitions. [2019-09-09 14:38:56,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 14:38:56,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 235 [2019-09-09 14:38:56,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:38:56,470 INFO L225 Difference]: With dead ends: 1045 [2019-09-09 14:38:56,470 INFO L226 Difference]: Without dead ends: 1045 [2019-09-09 14:38:56,471 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 14:38:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2019-09-09 14:38:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1023. [2019-09-09 14:38:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2019-09-09 14:38:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1315 transitions. [2019-09-09 14:38:56,500 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1315 transitions. Word has length 235 [2019-09-09 14:38:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:38:56,501 INFO L475 AbstractCegarLoop]: Abstraction has 1023 states and 1315 transitions. [2019-09-09 14:38:56,501 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:38:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1315 transitions. [2019-09-09 14:38:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-09-09 14:38:56,506 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:38:56,507 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-09-09 14:38:56,507 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:38:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:38:56,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2037587320, now seen corresponding path program 1 times [2019-09-09 14:38:56,508 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:38:56,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:38:56,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:38:56,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:38:56,509 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:38:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:38:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:38:57,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:38:57,061 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:38:57,061 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 272 with the following transitions: [2019-09-09 14:38:57,061 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:38:57,065 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:38:57,065 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)