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/Problem12_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:30:41,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:30:41,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:30:41,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 16:30:41,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 16:30:41,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 16:30:41,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 16:30:41,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 16:30:41,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 16:30:41,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 16:30:41,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 16:30:41,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 16:30:41,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 16:30:41,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 16:30:41,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 16:30:41,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 16:30:41,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 16:30:41,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:30:41,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:30:41,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:30:41,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:30:41,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:30:41,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:30:41,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:30:41,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:30:41,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:30:41,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:30:41,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:30:41,974 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 16:30:41,996 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:30:41,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:30:41,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:30:41,997 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:30:41,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:30:41,998 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:30:41,998 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:30:41,998 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:30:41,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:30:41,999 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:30:42,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:30:42,001 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:30:42,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:30:42,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:30:42,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:30:42,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:30:42,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:30:42,003 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:30:42,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:30:42,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:30:42,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:30:42,003 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:30:42,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:30:42,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:30:42,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:30:42,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:30:42,005 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:30:42,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:30:42,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:30:42,005 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:30:42,059 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:30:42,075 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:30:42,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:30:42,082 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:30:42,083 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:30:42,084 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label37.c [2019-09-09 16:30:42,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4fc82e68/d375cf715c7f47c68fd7ac49da585494/FLAG15c1ae1f9 [2019-09-09 16:30:42,974 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:30:42,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label37.c [2019-09-09 16:30:43,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4fc82e68/d375cf715c7f47c68fd7ac49da585494/FLAG15c1ae1f9 [2019-09-09 16:30:43,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4fc82e68/d375cf715c7f47c68fd7ac49da585494 [2019-09-09 16:30:43,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:30:43,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:30:43,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:30:43,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:30:43,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:30:43,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:30:43" (1/1) ... [2019-09-09 16:30:43,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a061dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:43, skipping insertion in model container [2019-09-09 16:30:43,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:30:43" (1/1) ... [2019-09-09 16:30:43,533 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:30:43,669 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:30:45,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:30:45,076 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:30:45,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:30:45,818 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:30:45,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45 WrapperNode [2019-09-09 16:30:45,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:30:45,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:30:45,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:30:45,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:30:45,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45" (1/1) ... [2019-09-09 16:30:45,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45" (1/1) ... [2019-09-09 16:30:45,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45" (1/1) ... [2019-09-09 16:30:45,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45" (1/1) ... [2019-09-09 16:30:46,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45" (1/1) ... [2019-09-09 16:30:46,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45" (1/1) ... [2019-09-09 16:30:46,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45" (1/1) ... [2019-09-09 16:30:46,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:30:46,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:30:46,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:30:46,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:30:46,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45" (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 16:30:46,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:30:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:30:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:30:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:30:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:30:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:30:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:30:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:30:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:30:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:30:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:30:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:30:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:30:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:30:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:30:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:30:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:30:51,129 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:30:51,130 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:30:51,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:30:51 BoogieIcfgContainer [2019-09-09 16:30:51,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:30:51,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:30:51,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:30:51,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:30:51,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:30:43" (1/3) ... [2019-09-09 16:30:51,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d96afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:30:51, skipping insertion in model container [2019-09-09 16:30:51,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:45" (2/3) ... [2019-09-09 16:30:51,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d96afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:30:51, skipping insertion in model container [2019-09-09 16:30:51,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:30:51" (3/3) ... [2019-09-09 16:30:51,147 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label37.c [2019-09-09 16:30:51,160 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:30:51,170 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:30:51,189 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:30:51,219 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:30:51,220 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:30:51,220 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:30:51,220 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:30:51,220 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:30:51,220 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:30:51,220 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:30:51,221 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:30:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 16:30:51,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-09 16:30:51,278 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:30:51,279 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:30:51,281 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:30:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:30:51,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1531102306, now seen corresponding path program 1 times [2019-09-09 16:30:51,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:30:51,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:30:51,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:30:51,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:30:51,342 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:30:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:30:51,609 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 16:30:51,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:30:51,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 16:30:51,613 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:30:51,619 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 16:30:51,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 16:30:51,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 16:30:51,637 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-09-09 16:30:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:30:56,837 INFO L93 Difference]: Finished difference Result 1610 states and 2807 transitions. [2019-09-09 16:30:56,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 16:30:56,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-09 16:30:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:30:56,904 INFO L225 Difference]: With dead ends: 1610 [2019-09-09 16:30:56,905 INFO L226 Difference]: Without dead ends: 1542 [2019-09-09 16:30:56,908 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 16:30:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-09-09 16:30:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-09-09 16:30:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-09-09 16:30:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2702 transitions. [2019-09-09 16:30:57,067 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2702 transitions. Word has length 19 [2019-09-09 16:30:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:30:57,068 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2702 transitions. [2019-09-09 16:30:57,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 16:30:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2702 transitions. [2019-09-09 16:30:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-09 16:30:57,074 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:30:57,075 INFO L399 BasicCegarLoop]: trace histogram [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 16:30:57,075 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:30:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:30:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2072609957, now seen corresponding path program 1 times [2019-09-09 16:30:57,077 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:30:57,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:30:57,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:30:57,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:30:57,079 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:30:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:30:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:30:57,279 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:30:57,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:30:57,279 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:30:57,284 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:30:57,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:30:57,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:30:57,285 INFO L87 Difference]: Start difference. First operand 1542 states and 2702 transitions. Second operand 4 states. [2019-09-09 16:31:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:31:05,393 INFO L93 Difference]: Finished difference Result 4610 states and 7729 transitions. [2019-09-09 16:31:05,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:31:05,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-09-09 16:31:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:31:05,424 INFO L225 Difference]: With dead ends: 4610 [2019-09-09 16:31:05,425 INFO L226 Difference]: Without dead ends: 4610 [2019-09-09 16:31:05,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:31:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2019-09-09 16:31:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2019-09-09 16:31:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2019-09-09 16:31:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 7729 transitions. [2019-09-09 16:31:05,569 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 7729 transitions. Word has length 94 [2019-09-09 16:31:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:31:05,570 INFO L475 AbstractCegarLoop]: Abstraction has 4610 states and 7729 transitions. [2019-09-09 16:31:05,570 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:31:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 7729 transitions. [2019-09-09 16:31:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-09 16:31:05,581 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:31:05,581 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:31:05,582 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:31:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:31:05,582 INFO L82 PathProgramCache]: Analyzing trace with hash 986749475, now seen corresponding path program 1 times [2019-09-09 16:31:05,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:31:05,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:05,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:31:05,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:05,586 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:31:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:31:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:31:05,755 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:31:05,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 16:31:05,755 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:31:05,756 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 16:31:05,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 16:31:05,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-09 16:31:05,758 INFO L87 Difference]: Start difference. First operand 4610 states and 7729 transitions. Second operand 5 states. [2019-09-09 16:31:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:31:12,219 INFO L93 Difference]: Finished difference Result 9406 states and 14687 transitions. [2019-09-09 16:31:12,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 16:31:12,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2019-09-09 16:31:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:31:12,271 INFO L225 Difference]: With dead ends: 9406 [2019-09-09 16:31:12,271 INFO L226 Difference]: Without dead ends: 9406 [2019-09-09 16:31:12,281 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:31:12,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9406 states. [2019-09-09 16:31:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9406 to 9324. [2019-09-09 16:31:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9324 states. [2019-09-09 16:31:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9324 states to 9324 states and 14436 transitions. [2019-09-09 16:31:12,584 INFO L78 Accepts]: Start accepts. Automaton has 9324 states and 14436 transitions. Word has length 98 [2019-09-09 16:31:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:31:12,587 INFO L475 AbstractCegarLoop]: Abstraction has 9324 states and 14436 transitions. [2019-09-09 16:31:12,587 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 16:31:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 9324 states and 14436 transitions. [2019-09-09 16:31:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-09 16:31:12,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:31:12,592 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:31:12,592 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:31:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:31:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2106378958, now seen corresponding path program 1 times [2019-09-09 16:31:12,593 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:31:12,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:12,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:31:12,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:12,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:31:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:31:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:31:12,785 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:31:12,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:31:12,785 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:31:12,787 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:31:12,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:31:12,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:31:12,788 INFO L87 Difference]: Start difference. First operand 9324 states and 14436 transitions. Second operand 6 states. [2019-09-09 16:31:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:31:20,047 INFO L93 Difference]: Finished difference Result 9680 states and 14814 transitions. [2019-09-09 16:31:20,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:31:20,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-09-09 16:31:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:31:20,117 INFO L225 Difference]: With dead ends: 9680 [2019-09-09 16:31:20,117 INFO L226 Difference]: Without dead ends: 9680 [2019-09-09 16:31:20,117 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 16:31:20,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9680 states. [2019-09-09 16:31:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9680 to 9652. [2019-09-09 16:31:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9652 states. [2019-09-09 16:31:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9652 states to 9652 states and 14621 transitions. [2019-09-09 16:31:20,329 INFO L78 Accepts]: Start accepts. Automaton has 9652 states and 14621 transitions. Word has length 109 [2019-09-09 16:31:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:31:20,333 INFO L475 AbstractCegarLoop]: Abstraction has 9652 states and 14621 transitions. [2019-09-09 16:31:20,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:31:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 9652 states and 14621 transitions. [2019-09-09 16:31:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-09 16:31:20,341 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:31:20,341 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:31:20,342 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:31:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:31:20,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1267346109, now seen corresponding path program 1 times [2019-09-09 16:31:20,342 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:31:20,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:20,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:31:20,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:20,344 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:31:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:31:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:31:20,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:31:20,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:31:20,486 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:31:20,487 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:31:20,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:31:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:31:20,488 INFO L87 Difference]: Start difference. First operand 9652 states and 14621 transitions. Second operand 6 states. [2019-09-09 16:31:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:31:27,197 INFO L93 Difference]: Finished difference Result 19645 states and 31011 transitions. [2019-09-09 16:31:27,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:31:27,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-09-09 16:31:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:31:27,277 INFO L225 Difference]: With dead ends: 19645 [2019-09-09 16:31:27,278 INFO L226 Difference]: Without dead ends: 19645 [2019-09-09 16:31:27,278 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 16:31:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2019-09-09 16:31:28,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 19447. [2019-09-09 16:31:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19447 states. [2019-09-09 16:31:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19447 states to 19447 states and 29756 transitions. [2019-09-09 16:31:28,527 INFO L78 Accepts]: Start accepts. Automaton has 19447 states and 29756 transitions. Word has length 114 [2019-09-09 16:31:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:31:28,527 INFO L475 AbstractCegarLoop]: Abstraction has 19447 states and 29756 transitions. [2019-09-09 16:31:28,527 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:31:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 19447 states and 29756 transitions. [2019-09-09 16:31:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-09 16:31:28,529 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:31:28,529 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:31:28,529 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:31:28,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:31:28,530 INFO L82 PathProgramCache]: Analyzing trace with hash 127103319, now seen corresponding path program 1 times [2019-09-09 16:31:28,530 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:31:28,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:28,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:31:28,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:28,534 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:31:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:31:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:31:28,653 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:31:28,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 16:31:28,654 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:31:28,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 16:31:28,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 16:31:28,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 16:31:28,655 INFO L87 Difference]: Start difference. First operand 19447 states and 29756 transitions. Second operand 5 states. [2019-09-09 16:31:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:31:36,343 INFO L93 Difference]: Finished difference Result 37553 states and 56406 transitions. [2019-09-09 16:31:36,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 16:31:36,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2019-09-09 16:31:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:31:36,502 INFO L225 Difference]: With dead ends: 37553 [2019-09-09 16:31:36,503 INFO L226 Difference]: Without dead ends: 37553 [2019-09-09 16:31:36,503 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 16:31:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37553 states. [2019-09-09 16:31:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37553 to 37222. [2019-09-09 16:31:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37222 states. [2019-09-09 16:31:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37222 states to 37222 states and 54571 transitions. [2019-09-09 16:31:37,461 INFO L78 Accepts]: Start accepts. Automaton has 37222 states and 54571 transitions. Word has length 140 [2019-09-09 16:31:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:31:37,462 INFO L475 AbstractCegarLoop]: Abstraction has 37222 states and 54571 transitions. [2019-09-09 16:31:37,462 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 16:31:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 37222 states and 54571 transitions. [2019-09-09 16:31:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-09-09 16:31:37,466 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:31:37,467 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 16:31:37,470 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:31:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:31:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1139869001, now seen corresponding path program 1 times [2019-09-09 16:31:37,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:31:37,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:37,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:31:37,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:31:37,476 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:31:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:31:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 16:31:37,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:31:37,679 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:31:37,680 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2019-09-09 16:31:37,683 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1927], [1929], [1932], [1940], [1948], [1956], [1964], [1972], [1980], [1988], [1996], [2004], [2012], [2020], [2028], [2036], [2044], [2052], [2060], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2400], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2564], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 16:31:37,760 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:31:37,760 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 16:32:04,351 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 16:32:04,353 INFO L272 AbstractInterpreter]: Visited 125 different actions 125 times. Never merged. Never widened. Performed 294 root evaluator evaluations with a maximum evaluation depth of 16. Performed 294 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 16:32:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:32:04,357 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 16:32:27,458 INFO L227 lantSequenceWeakener]: Weakened 199 states. On average, predicates are now at 75.15% of their original sizes. [2019-09-09 16:32:27,459 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 16:32:27,541 INFO L420 sIntCurrentIteration]: We unified 217 AI predicates to 217 [2019-09-09 16:32:27,542 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 16:32:27,543 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 16:32:27,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 16:32:27,543 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:32:27,544 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 16:32:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 16:32:27,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 16:32:27,544 INFO L87 Difference]: Start difference. First operand 37222 states and 54571 transitions. Second operand 11 states. [2019-09-09 16:36:19,289 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.