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_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 16:30:42,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 16:30:42,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 16:30:42,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 16:30:42,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 16:30:42,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 16:30:42,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 16:30:42,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 16:30:42,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 16:30:42,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 16:30:42,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 16:30:42,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 16:30:42,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 16:30:42,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 16:30:42,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 16:30:42,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 16:30:42,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 16:30:42,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 16:30:42,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 16:30:42,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 16:30:42,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 16:30:42,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 16:30:42,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 16:30:42,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 16:30:42,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 16:30:42,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 16:30:42,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 16:30:42,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 16:30:42,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 16:30:42,995 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 16:30:42,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 16:30:42,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 16:30:42,995 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 16:30:42,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 16:30:42,996 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 16:30:42,997 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 16:30:42,997 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 16:30:42,997 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 16:30:42,997 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 16:30:42,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 16:30:42,998 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 16:30:42,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 16:30:42,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 16:30:42,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 16:30:42,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 16:30:42,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 16:30:42,999 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 16:30:42,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 16:30:43,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 16:30:43,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 16:30:43,000 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 16:30:43,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 16:30:43,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:30:43,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 16:30:43,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 16:30:43,001 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 16:30:43,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 16:30:43,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 16:30:43,002 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 16:30:43,031 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 16:30:43,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 16:30:43,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 16:30:43,049 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 16:30:43,050 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 16:30:43,050 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label11.c [2019-10-02 16:30:43,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/611171bfc/c67ed566d01a45e8bdea9919199f86c0/FLAG7a9587fe5 [2019-10-02 16:30:43,681 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 16:30:43,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label11.c [2019-10-02 16:30:43,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/611171bfc/c67ed566d01a45e8bdea9919199f86c0/FLAG7a9587fe5 [2019-10-02 16:30:44,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/611171bfc/c67ed566d01a45e8bdea9919199f86c0 [2019-10-02 16:30:44,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 16:30:44,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 16:30:44,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 16:30:44,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 16:30:44,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 16:30:44,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17644812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44, skipping insertion in model container [2019-10-02 16:30:44,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,114 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 16:30:44,174 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 16:30:44,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:30:44,707 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 16:30:44,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:30:44,875 INFO L192 MainTranslator]: Completed translation [2019-10-02 16:30:44,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44 WrapperNode [2019-10-02 16:30:44,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 16:30:44,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 16:30:44,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 16:30:44,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 16:30:44,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 16:30:44,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 16:30:44,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 16:30:44,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 16:30:44,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:30:45,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 16:30:45,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 16:30:45,079 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 16:30:45,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 16:30:45,080 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 16:30:45,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 16:30:45,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 16:30:45,080 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 16:30:45,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 16:30:45,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 16:30:45,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 16:30:46,355 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 16:30:46,355 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 16:30:46,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:30:46 BoogieIcfgContainer [2019-10-02 16:30:46,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 16:30:46,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 16:30:46,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 16:30:46,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 16:30:46,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 04:30:44" (1/3) ... [2019-10-02 16:30:46,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f485e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:30:46, skipping insertion in model container [2019-10-02 16:30:46,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (2/3) ... [2019-10-02 16:30:46,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f485e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:30:46, skipping insertion in model container [2019-10-02 16:30:46,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:30:46" (3/3) ... [2019-10-02 16:30:46,366 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label11.c [2019-10-02 16:30:46,376 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 16:30:46,385 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 16:30:46,404 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 16:30:46,434 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 16:30:46,435 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 16:30:46,435 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 16:30:46,435 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 16:30:46,435 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 16:30:46,436 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 16:30:46,436 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 16:30:46,436 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 16:30:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 16:30:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-02 16:30:46,478 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:46,480 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:30:46,483 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1377016033, now seen corresponding path program 1 times [2019-10-02 16:30:46,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:46,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:46,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:46,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:46,554 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:47,051 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:47,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:30:47,052 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:47,058 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:30:47,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:30:47,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:30:47,076 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-02 16:30:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:47,956 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2019-10-02 16:30:47,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:30:47,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-10-02 16:30:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:47,984 INFO L225 Difference]: With dead ends: 346 [2019-10-02 16:30:47,984 INFO L226 Difference]: Without dead ends: 278 [2019-10-02 16:30:47,986 INFO L640 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 [2019-10-02 16:30:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-02 16:30:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-02 16:30:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 16:30:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-02 16:30:48,061 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 115 [2019-10-02 16:30:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:48,062 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-02 16:30:48,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:30:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-02 16:30:48,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-02 16:30:48,071 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:48,075 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 16:30:48,076 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1300380632, now seen corresponding path program 1 times [2019-10-02 16:30:48,077 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:48,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:48,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:48,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:48,079 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:48,247 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:48,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 16:30:48,248 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:48,250 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 16:30:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 16:30:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 16:30:48,251 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-02 16:30:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:49,126 INFO L93 Difference]: Finished difference Result 431 states and 612 transitions. [2019-10-02 16:30:49,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 16:30:49,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-02 16:30:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:49,133 INFO L225 Difference]: With dead ends: 431 [2019-10-02 16:30:49,134 INFO L226 Difference]: Without dead ends: 431 [2019-10-02 16:30:49,135 INFO L640 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 [2019-10-02 16:30:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-02 16:30:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-02 16:30:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-02 16:30:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-02 16:30:49,194 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 125 [2019-10-02 16:30:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:49,195 INFO L475 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-02 16:30:49,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 16:30:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-02 16:30:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-02 16:30:49,200 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:49,200 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 16:30:49,201 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:49,205 INFO L82 PathProgramCache]: Analyzing trace with hash 860697510, now seen corresponding path program 1 times [2019-10-02 16:30:49,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:49,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:49,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:49,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:49,208 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:49,537 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:49,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 16:30:49,537 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:49,538 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 16:30:49,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 16:30:49,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-02 16:30:49,538 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 5 states. [2019-10-02 16:30:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:50,258 INFO L93 Difference]: Finished difference Result 520 states and 690 transitions. [2019-10-02 16:30:50,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 16:30:50,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2019-10-02 16:30:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:50,263 INFO L225 Difference]: With dead ends: 520 [2019-10-02 16:30:50,264 INFO L226 Difference]: Without dead ends: 417 [2019-10-02 16:30:50,264 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-02 16:30:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-10-02 16:30:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2019-10-02 16:30:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-10-02 16:30:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 550 transitions. [2019-10-02 16:30:50,282 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 550 transitions. Word has length 126 [2019-10-02 16:30:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:50,282 INFO L475 AbstractCegarLoop]: Abstraction has 417 states and 550 transitions. [2019-10-02 16:30:50,283 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 16:30:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 550 transitions. [2019-10-02 16:30:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-02 16:30:50,284 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:50,285 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 16:30:50,285 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:50,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1706034196, now seen corresponding path program 1 times [2019-10-02 16:30:50,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:50,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:50,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:50,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:50,288 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:50,566 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:50,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 16:30:50,567 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:50,568 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 16:30:50,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 16:30:50,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-02 16:30:50,568 INFO L87 Difference]: Start difference. First operand 417 states and 550 transitions. Second operand 5 states. [2019-10-02 16:30:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:51,187 INFO L93 Difference]: Finished difference Result 501 states and 634 transitions. [2019-10-02 16:30:51,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 16:30:51,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2019-10-02 16:30:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:51,190 INFO L225 Difference]: With dead ends: 501 [2019-10-02 16:30:51,191 INFO L226 Difference]: Without dead ends: 417 [2019-10-02 16:30:51,191 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-02 16:30:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-10-02 16:30:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2019-10-02 16:30:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-10-02 16:30:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 547 transitions. [2019-10-02 16:30:51,205 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 547 transitions. Word has length 127 [2019-10-02 16:30:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:51,205 INFO L475 AbstractCegarLoop]: Abstraction has 417 states and 547 transitions. [2019-10-02 16:30:51,205 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 16:30:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 547 transitions. [2019-10-02 16:30:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-02 16:30:51,207 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:51,208 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:30:51,208 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash 508544498, now seen corresponding path program 1 times [2019-10-02 16:30:51,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:51,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:51,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:51,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:51,210 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:51,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:51,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:30:51,326 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:51,327 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:30:51,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:30:51,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:30:51,328 INFO L87 Difference]: Start difference. First operand 417 states and 547 transitions. Second operand 3 states. [2019-10-02 16:30:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:51,792 INFO L93 Difference]: Finished difference Result 826 states and 1069 transitions. [2019-10-02 16:30:51,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:30:51,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-10-02 16:30:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:51,800 INFO L225 Difference]: With dead ends: 826 [2019-10-02 16:30:51,800 INFO L226 Difference]: Without dead ends: 826 [2019-10-02 16:30:51,800 INFO L640 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 [2019-10-02 16:30:51,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2019-10-02 16:30:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2019-10-02 16:30:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2019-10-02 16:30:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1069 transitions. [2019-10-02 16:30:51,824 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1069 transitions. Word has length 132 [2019-10-02 16:30:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:51,825 INFO L475 AbstractCegarLoop]: Abstraction has 826 states and 1069 transitions. [2019-10-02 16:30:51,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:30:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1069 transitions. [2019-10-02 16:30:51,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-02 16:30:51,829 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:51,829 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:30:51,829 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash -486972616, now seen corresponding path program 1 times [2019-10-02 16:30:51,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:51,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:51,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:51,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:51,831 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:51,898 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:51,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 16:30:51,898 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:51,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 16:30:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 16:30:51,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 16:30:51,899 INFO L87 Difference]: Start difference. First operand 826 states and 1069 transitions. Second operand 6 states. [2019-10-02 16:30:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:52,592 INFO L93 Difference]: Finished difference Result 1555 states and 2006 transitions. [2019-10-02 16:30:52,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 16:30:52,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-10-02 16:30:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:52,604 INFO L225 Difference]: With dead ends: 1555 [2019-10-02 16:30:52,604 INFO L226 Difference]: Without dead ends: 1555 [2019-10-02 16:30:52,605 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 16:30:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2019-10-02 16:30:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1531. [2019-10-02 16:30:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1531 states. [2019-10-02 16:30:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1927 transitions. [2019-10-02 16:30:52,670 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1927 transitions. Word has length 133 [2019-10-02 16:30:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:52,671 INFO L475 AbstractCegarLoop]: Abstraction has 1531 states and 1927 transitions. [2019-10-02 16:30:52,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 16:30:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1927 transitions. [2019-10-02 16:30:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-02 16:30:52,679 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:52,680 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 16:30:52,680 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1684411513, now seen corresponding path program 1 times [2019-10-02 16:30:52,680 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:52,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:52,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:52,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:52,687 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:52,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 16:30:52,821 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 16:30:52,823 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 149 with the following transitions: [2019-10-02 16:30:52,825 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [30], [33], [34], [38], [42], [45], [46], [50], [54], [58], [62], [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], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [489], [497], [505], [513], [521], [529], [537], [545], [553], [561], [565], [567], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 16:30:52,896 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 16:30:52,897 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)