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/Problem18_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:08:53,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:08:53,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:08:53,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 22:08:53,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 22:08:53,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 22:08:53,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 22:08:53,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 22:08:53,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 22:08:53,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 22:08:53,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 22:08:53,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 22:08:53,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 22:08:53,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 22:08:53,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 22:08:53,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 22:08:53,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 22:08:53,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 22:08:53,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 22:08:53,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 22:08:53,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 22:08:53,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 22:08:53,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 22:08:53,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 22:08:53,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 22:08:53,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 22:08:53,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 22:08:53,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 22:08:53,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 22:08:53,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 22:08:53,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 22:08:53,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 22:08:53,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 22:08:53,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 22:08:53,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 22:08:53,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 22:08:53,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 22:08:53,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 22:08:53,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 22:08:53,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 22:08:53,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 22:08:53,965 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 22:08:53,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:08:53,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:08:53,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:08:53,980 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:08:53,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:08:53,980 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:08:53,981 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:08:53,981 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:08:53,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:08:53,981 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:08:53,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:08:53,982 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:08:53,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:08:53,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:08:53,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:08:53,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:08:53,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:08:53,983 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:08:53,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:08:53,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:08:53,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:08:53,984 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:08:53,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:08:53,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:08:53,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:08:53,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:08:53,985 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:08:53,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:08:53,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:08:53,986 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:08:54,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:08:54,036 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:08:54,041 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:08:54,042 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:08:54,043 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:08:54,044 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label20.c [2019-09-09 22:08:54,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38989d1f3/7188cdf8c7824fdd94ef433d3ba26dd0/FLAG2fff2c085 [2019-09-09 22:08:54,849 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:08:54,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label20.c [2019-09-09 22:08:54,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38989d1f3/7188cdf8c7824fdd94ef433d3ba26dd0/FLAG2fff2c085 [2019-09-09 22:08:54,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38989d1f3/7188cdf8c7824fdd94ef433d3ba26dd0 [2019-09-09 22:08:54,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:08:54,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:08:54,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:08:54,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:08:54,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:08:54,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:08:54" (1/1) ... [2019-09-09 22:08:54,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772df1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:54, skipping insertion in model container [2019-09-09 22:08:54,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:08:54" (1/1) ... [2019-09-09 22:08:54,995 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:08:55,134 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:08:56,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:08:56,168 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:08:56,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:08:56,761 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:08:56,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56 WrapperNode [2019-09-09 22:08:56,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:08:56,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:08:56,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:08:56,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:08:56,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56" (1/1) ... [2019-09-09 22:08:56,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56" (1/1) ... [2019-09-09 22:08:56,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56" (1/1) ... [2019-09-09 22:08:56,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56" (1/1) ... [2019-09-09 22:08:56,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56" (1/1) ... [2019-09-09 22:08:57,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56" (1/1) ... [2019-09-09 22:08:57,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56" (1/1) ... [2019-09-09 22:08:57,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:08:57,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:08:57,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:08:57,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:08:57,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56" (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 22:08:57,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:08:57,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:08:57,121 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:08:57,122 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:08:57,122 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:08:57,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:08:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:08:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:08:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:08:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:08:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:08:57,124 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:08:57,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:08:57,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:08:57,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:09:00,539 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:09:00,539 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:09:00,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:09:00 BoogieIcfgContainer [2019-09-09 22:09:00,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:09:00,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:09:00,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:09:00,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:09:00,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:08:54" (1/3) ... [2019-09-09 22:09:00,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fe2890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:09:00, skipping insertion in model container [2019-09-09 22:09:00,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:08:56" (2/3) ... [2019-09-09 22:09:00,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fe2890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:09:00, skipping insertion in model container [2019-09-09 22:09:00,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:09:00" (3/3) ... [2019-09-09 22:09:00,561 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label20.c [2019-09-09 22:09:00,574 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:09:00,584 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:09:00,603 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:09:00,634 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:09:00,634 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:09:00,634 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:09:00,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:09:00,634 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:09:00,634 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:09:00,635 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:09:00,635 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:09:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:09:00,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-09 22:09:00,681 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:09:00,682 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:09:00,684 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:09:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:09:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1233530833, now seen corresponding path program 1 times [2019-09-09 22:09:00,693 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:09:00,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:00,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:09:00,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:00,738 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:09:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:09:00,902 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 22:09:00,905 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:09:00,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:09:00,906 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:09:00,911 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:09:00,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:09:00,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:09:00,929 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:09:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:09:05,449 INFO L93 Difference]: Finished difference Result 1480 states and 2667 transitions. [2019-09-09 22:09:05,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:09:05,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-09-09 22:09:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:09:05,508 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:09:05,509 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:09:05,512 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 22:09:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:09:05,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:09:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:09:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-09-09 22:09:05,647 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 12 [2019-09-09 22:09:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:09:05,648 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-09-09 22:09:05,648 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:09:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-09-09 22:09:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-09 22:09:05,652 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:09:05,652 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 22:09:05,652 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:09:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:09:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash -618546903, now seen corresponding path program 1 times [2019-09-09 22:09:05,653 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:09:05,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:05,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:09:05,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:05,655 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:09:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:09:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:09:05,890 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:09:05,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:09:05,890 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:09:05,893 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:09:05,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:09:05,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:09:05,894 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-09-09 22:09:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:09:11,340 INFO L93 Difference]: Finished difference Result 2166 states and 3658 transitions. [2019-09-09 22:09:11,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:09:11,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2019-09-09 22:09:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:09:11,354 INFO L225 Difference]: With dead ends: 2166 [2019-09-09 22:09:11,354 INFO L226 Difference]: Without dead ends: 2166 [2019-09-09 22:09:11,355 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 22:09:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-09-09 22:09:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-09-09 22:09:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-09-09 22:09:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-09-09 22:09:11,416 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 83 [2019-09-09 22:09:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:09:11,417 INFO L475 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-09-09 22:09:11,417 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:09:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-09-09 22:09:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-09 22:09:11,421 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:09:11,422 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 22:09:11,422 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:09:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:09:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1079500740, now seen corresponding path program 1 times [2019-09-09 22:09:11,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:09:11,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:11,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:09:11,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:11,424 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:09:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:09:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:09:11,636 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:09:11,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:09:11,637 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:09:11,637 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:09:11,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:09:11,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:09:11,638 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-09-09 22:09:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:09:16,623 INFO L93 Difference]: Finished difference Result 2911 states and 4533 transitions. [2019-09-09 22:09:16,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:09:16,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2019-09-09 22:09:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:09:16,639 INFO L225 Difference]: With dead ends: 2911 [2019-09-09 22:09:16,640 INFO L226 Difference]: Without dead ends: 2911 [2019-09-09 22:09:16,640 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 22:09:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-09-09 22:09:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-09-09 22:09:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-09-09 22:09:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-09-09 22:09:16,710 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 106 [2019-09-09 22:09:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:09:16,711 INFO L475 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-09-09 22:09:16,711 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:09:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-09-09 22:09:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-09 22:09:16,713 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:09:16,713 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 22:09:16,714 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:09:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:09:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash 140345460, now seen corresponding path program 1 times [2019-09-09 22:09:16,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:09:16,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:16,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:09:16,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:16,716 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:09:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:09:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:09:16,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:09:16,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:09:16,858 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:09:16,859 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:09:16,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:09:16,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:09:16,860 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-09-09 22:09:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:09:21,598 INFO L93 Difference]: Finished difference Result 3662 states and 5163 transitions. [2019-09-09 22:09:21,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:09:21,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-09-09 22:09:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:09:21,621 INFO L225 Difference]: With dead ends: 3662 [2019-09-09 22:09:21,622 INFO L226 Difference]: Without dead ends: 3662 [2019-09-09 22:09:21,623 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 22:09:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-09-09 22:09:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-09-09 22:09:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-09-09 22:09:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-09-09 22:09:21,711 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 110 [2019-09-09 22:09:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:09:21,713 INFO L475 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-09-09 22:09:21,713 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:09:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-09-09 22:09:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 22:09:21,722 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:09:21,722 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:09:21,722 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:09:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:09:21,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1104679829, now seen corresponding path program 1 times [2019-09-09 22:09:21,723 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:09:21,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:21,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:09:21,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:21,724 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:09:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:09:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:09:21,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:09:21,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:09:21,942 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:09:21,943 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:09:21,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:09:21,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:09:21,944 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-09-09 22:09:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:09:27,118 INFO L93 Difference]: Finished difference Result 6768 states and 9269 transitions. [2019-09-09 22:09:27,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:09:27,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-09-09 22:09:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:09:27,150 INFO L225 Difference]: With dead ends: 6768 [2019-09-09 22:09:27,150 INFO L226 Difference]: Without dead ends: 6768 [2019-09-09 22:09:27,151 INFO L628 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 [2019-09-09 22:09:27,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-09-09 22:09:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-09-09 22:09:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-09-09 22:09:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-09-09 22:09:27,295 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 141 [2019-09-09 22:09:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:09:27,296 INFO L475 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-09-09 22:09:27,296 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:09:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-09-09 22:09:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-09-09 22:09:27,299 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:09:27,299 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 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 22:09:27,300 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:09:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:09:27,300 INFO L82 PathProgramCache]: Analyzing trace with hash -980479594, now seen corresponding path program 1 times [2019-09-09 22:09:27,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:09:27,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:27,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:09:27,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:09:27,302 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:09:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:09:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 22:09:27,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:09:27,436 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:09:27,437 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 174 with the following transitions: [2019-09-09 22:09:27,439 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1627], [1629], [1632], [1640], [1648], [1656], [1664], [1672], [1680], [1688], [1696], [1704], [1712], [1720], [1728], [1736], [1744], [1752], [1760], [1768], [1776], [1784], [1792], [1800], [1808], [1816], [1824], [1832], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2124], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2200], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:09:27,488 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:09:27,489 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:09:31,281 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:09:31,283 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 229 root evaluator evaluations with a maximum evaluation depth of 13. Performed 229 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:09:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:09:31,288 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:09:34,329 INFO L227 lantSequenceWeakener]: Weakened 154 states. On average, predicates are now at 77.28% of their original sizes. [2019-09-09 22:09:34,329 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:09:34,413 INFO L420 sIntCurrentIteration]: We unified 172 AI predicates to 172 [2019-09-09 22:09:34,413 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:09:34,414 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:09:34,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 22:09:34,415 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:09:34,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:09:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:09:34,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:09:34,416 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 10 states. [2019-09-09 22:11:15,506 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.