java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 06:24:58,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 06:24:58,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 06:24:58,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 06:24:58,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 06:24:58,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 06:24:58,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 06:24:58,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 06:24:58,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 06:24:58,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 06:24:58,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 06:24:58,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-09-09 06:24:58,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 06:24:59,034 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 06:24:59,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 06:24:59,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 06:24:59,035 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 06:24:59,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 06:24:59,035 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 06:24:59,036 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 06:24:59,036 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 06:24:59,036 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 06:24:59,039 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 06:24:59,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 06:24:59,040 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 06:24:59,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 06:24:59,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 06:24:59,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 06:24:59,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 06:24:59,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 06:24:59,041 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 06:24:59,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 06:24:59,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 06:24:59,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 06:24:59,042 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 06:24:59,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 06:24:59,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 06:24:59,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 06:24:59,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 06:24:59,045 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 06:24:59,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 06:24:59,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 06:24:59,046 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 06:24:59,077 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 06:24:59,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 06:24:59,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 06:24:59,095 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 06:24:59,095 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 06:24:59,096 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label40.c [2019-09-09 06:24:59,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6838938ab/63cd1b66b0b2423bbd4a1048e89fbb02/FLAGc533bfe16 [2019-09-09 06:24:59,692 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 06:24:59,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label40.c [2019-09-09 06:24:59,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6838938ab/63cd1b66b0b2423bbd4a1048e89fbb02/FLAGc533bfe16 [2019-09-09 06:24:59,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6838938ab/63cd1b66b0b2423bbd4a1048e89fbb02 [2019-09-09 06:24:59,996 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 06:24:59,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 06:24:59,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 06:25:00,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 06:25:00,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 06:25:00,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:24:59" (1/1) ... [2019-09-09 06:25:00,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374b1c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00, skipping insertion in model container [2019-09-09 06:25:00,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:24:59" (1/1) ... [2019-09-09 06:25:00,015 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 06:25:00,073 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 06:25:00,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:25:00,559 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 06:25:00,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:25:00,774 INFO L192 MainTranslator]: Completed translation [2019-09-09 06:25:00,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00 WrapperNode [2019-09-09 06:25:00,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 06:25:00,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 06:25:00,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 06:25:00,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 06:25:00,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00" (1/1) ... [2019-09-09 06:25:00,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00" (1/1) ... [2019-09-09 06:25:00,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00" (1/1) ... [2019-09-09 06:25:00,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00" (1/1) ... [2019-09-09 06:25:00,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00" (1/1) ... [2019-09-09 06:25:00,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00" (1/1) ... [2019-09-09 06:25:00,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00" (1/1) ... [2019-09-09 06:25:00,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 06:25:00,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 06:25:00,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 06:25:00,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 06:25:00,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 06:25:01,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 06:25:01,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 06:25:01,066 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 06:25:01,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 06:25:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 06:25:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 06:25:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 06:25:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 06:25:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 06:25:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 06:25:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 06:25:02,508 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 06:25:02,509 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 06:25:02,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:25:02 BoogieIcfgContainer [2019-09-09 06:25:02,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 06:25:02,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 06:25:02,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 06:25:02,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 06:25:02,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:24:59" (1/3) ... [2019-09-09 06:25:02,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e4c50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:25:02, skipping insertion in model container [2019-09-09 06:25:02,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:25:00" (2/3) ... [2019-09-09 06:25:02,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e4c50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:25:02, skipping insertion in model container [2019-09-09 06:25:02,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:25:02" (3/3) ... [2019-09-09 06:25:02,520 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label40.c [2019-09-09 06:25:02,530 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 06:25:02,542 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 06:25:02,561 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 06:25:02,597 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 06:25:02,598 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 06:25:02,598 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 06:25:02,598 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 06:25:02,598 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 06:25:02,598 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 06:25:02,599 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 06:25:02,599 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 06:25:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-09-09 06:25:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-09 06:25:02,666 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:25:02,667 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 06:25:02,670 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:25:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:25:02,678 INFO L82 PathProgramCache]: Analyzing trace with hash 900807719, now seen corresponding path program 1 times [2019-09-09 06:25:02,681 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:25:02,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:25:02,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:25:02,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:25:02,746 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:25:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:25:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:25:03,178 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:25:03,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 06:25:03,178 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:25:03,186 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 06:25:03,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 06:25:03,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:25:03,203 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-09-09 06:25:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:25:04,126 INFO L93 Difference]: Finished difference Result 346 states and 515 transitions. [2019-09-09 06:25:04,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 06:25:04,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2019-09-09 06:25:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:25:04,144 INFO L225 Difference]: With dead ends: 346 [2019-09-09 06:25:04,144 INFO L226 Difference]: Without dead ends: 278 [2019-09-09 06:25:04,146 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:25:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-09-09 06:25:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-09-09 06:25:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-09-09 06:25:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-09-09 06:25:04,215 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 93 [2019-09-09 06:25:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:25:04,216 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-09-09 06:25:04,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 06:25:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-09-09 06:25:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-09 06:25:04,222 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:25:04,222 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 06:25:04,222 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:25:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:25:04,223 INFO L82 PathProgramCache]: Analyzing trace with hash 33868842, now seen corresponding path program 1 times [2019-09-09 06:25:04,223 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:25:04,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:25:04,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:25:04,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:25:04,225 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:25:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:25:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:25:04,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:25:04,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 06:25:04,352 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:25:04,354 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 06:25:04,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 06:25:04,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:25:04,355 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2019-09-09 06:25:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:25:05,100 INFO L93 Difference]: Finished difference Result 568 states and 808 transitions. [2019-09-09 06:25:05,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 06:25:05,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2019-09-09 06:25:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:25:05,107 INFO L225 Difference]: With dead ends: 568 [2019-09-09 06:25:05,107 INFO L226 Difference]: Without dead ends: 568 [2019-09-09 06:25:05,108 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 06:25:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-09-09 06:25:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2019-09-09 06:25:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-09-09 06:25:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 787 transitions. [2019-09-09 06:25:05,161 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 787 transitions. Word has length 102 [2019-09-09 06:25:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:25:05,162 INFO L475 AbstractCegarLoop]: Abstraction has 558 states and 787 transitions. [2019-09-09 06:25:05,162 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 06:25:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 787 transitions. [2019-09-09 06:25:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-09 06:25:05,179 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:25:05,179 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 06:25:05,179 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:25:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:25:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2021749471, now seen corresponding path program 1 times [2019-09-09 06:25:05,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:25:05,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:25:05,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:25:05,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:25:05,184 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:25:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:25:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:25:05,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 06:25:05,343 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 06:25:05,344 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 128 with the following transitions: [2019-09-09 06:25:05,347 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [65], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [162], [166], [170], [174], [178], [182], [186], [190], [194], [198], [202], [206], [210], [214], [218], [222], [226], [230], [234], [238], [242], [246], [250], [254], [258], [262], [266], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-09-09 06:25:05,393 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 06:25:05,393 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)