java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:54:20,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:54:20,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:54:20,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 15:54:20,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 15:54:20,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 15:54:20,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 15:54:20,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 15:54:20,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 15:54:20,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 15:54:20,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 15:54:20,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 15:54:20,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 15:54:20,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 15:54:20,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 15:54:20,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 15:54:20,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 15:54:20,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 15:54:20,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 15:54:20,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 15:54:20,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 15:54:20,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 15:54:20,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 15:54:20,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 15:54:20,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 15:54:20,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 15:54:20,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 15:54:20,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 15:54:20,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 15:54:20,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 15:54:20,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 15:54:20,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 15:54:20,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 15:54:20,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 15:54:20,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 15:54:20,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 15:54:20,920 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 15:54:20,945 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:54:20,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:54:20,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:54:20,948 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:54:20,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:54:20,949 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:54:20,949 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:54:20,950 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:54:20,950 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:54:20,950 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:54:20,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:54:20,952 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:54:20,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:54:20,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:54:20,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:54:20,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:54:20,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:54:20,953 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:54:20,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:54:20,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:54:20,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:54:20,954 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:54:20,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:54:20,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:54:20,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:54:20,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:54:20,956 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:54:20,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:54:20,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:54:20,957 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:54:21,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:54:21,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:54:21,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:54:21,035 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:54:21,035 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:54:21,036 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label04.c [2019-09-09 15:54:21,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f235df9c/cadc2c7f6a2a44759a3683e93b74149c/FLAGf19937f6e [2019-09-09 15:54:21,873 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:54:21,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label04.c [2019-09-09 15:54:21,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f235df9c/cadc2c7f6a2a44759a3683e93b74149c/FLAGf19937f6e [2019-09-09 15:54:21,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f235df9c/cadc2c7f6a2a44759a3683e93b74149c [2019-09-09 15:54:21,975 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:54:21,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:54:21,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:54:21,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:54:21,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:54:21,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:54:21" (1/1) ... [2019-09-09 15:54:21,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbe1c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:21, skipping insertion in model container [2019-09-09 15:54:21,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:54:21" (1/1) ... [2019-09-09 15:54:22,002 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:54:22,168 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:54:23,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:54:23,584 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:54:24,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:54:24,315 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:54:24,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24 WrapperNode [2019-09-09 15:54:24,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:54:24,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:54:24,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:54:24,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:54:24,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24" (1/1) ... [2019-09-09 15:54:24,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24" (1/1) ... [2019-09-09 15:54:24,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24" (1/1) ... [2019-09-09 15:54:24,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24" (1/1) ... [2019-09-09 15:54:24,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24" (1/1) ... [2019-09-09 15:54:24,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24" (1/1) ... [2019-09-09 15:54:24,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24" (1/1) ... [2019-09-09 15:54:24,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:54:24,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:54:24,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:54:24,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:54:24,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24" (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 15:54:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:54:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:54:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:54:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 15:54:24,717 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 15:54:24,717 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 15:54:24,717 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:54:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:54:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 15:54:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 15:54:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 15:54:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:54:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:54:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:54:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:54:24,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:54:24,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:54:30,208 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:54:30,209 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:54:30,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:54:30 BoogieIcfgContainer [2019-09-09 15:54:30,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:54:30,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:54:30,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:54:30,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:54:30,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:54:21" (1/3) ... [2019-09-09 15:54:30,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5073373a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:54:30, skipping insertion in model container [2019-09-09 15:54:30,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:54:24" (2/3) ... [2019-09-09 15:54:30,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5073373a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:54:30, skipping insertion in model container [2019-09-09 15:54:30,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:54:30" (3/3) ... [2019-09-09 15:54:30,220 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label04.c [2019-09-09 15:54:30,231 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:54:30,244 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:54:30,266 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:54:30,301 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:54:30,301 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:54:30,301 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:54:30,301 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:54:30,301 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:54:30,301 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:54:30,302 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:54:30,302 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:54:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 15:54:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-09 15:54:30,367 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:54:30,369 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:54:30,371 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:54:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:54:30,377 INFO L82 PathProgramCache]: Analyzing trace with hash 983219013, now seen corresponding path program 1 times [2019-09-09 15:54:30,379 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:54:30,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:54:30,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:54:30,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:54:30,439 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:54:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:54:30,777 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 15:54:30,780 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:54:30,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 15:54:30,781 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:54:30,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 15:54:30,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 15:54:30,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 15:54:30,811 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-09-09 15:54:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:54:36,355 INFO L93 Difference]: Finished difference Result 1610 states and 2967 transitions. [2019-09-09 15:54:36,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 15:54:36,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2019-09-09 15:54:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:54:36,404 INFO L225 Difference]: With dead ends: 1610 [2019-09-09 15:54:36,404 INFO L226 Difference]: Without dead ends: 1542 [2019-09-09 15:54:36,409 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 15:54:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-09-09 15:54:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-09-09 15:54:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-09-09 15:54:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2858 transitions. [2019-09-09 15:54:36,578 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2858 transitions. Word has length 66 [2019-09-09 15:54:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:54:36,580 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2858 transitions. [2019-09-09 15:54:36,580 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 15:54:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2858 transitions. [2019-09-09 15:54:36,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-09 15:54:36,593 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:54:36,594 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 15:54:36,594 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:54:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:54:36,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1886756489, now seen corresponding path program 1 times [2019-09-09 15:54:36,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:54:36,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:54:36,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:54:36,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:54:36,597 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:54:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:54:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:54:36,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:54:36,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:54:36,926 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:54:36,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:54:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:54:36,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:54:36,929 INFO L87 Difference]: Start difference. First operand 1542 states and 2858 transitions. Second operand 6 states. [2019-09-09 15:54:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:54:44,679 INFO L93 Difference]: Finished difference Result 3169 states and 5561 transitions. [2019-09-09 15:54:44,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 15:54:44,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-09-09 15:54:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:54:44,709 INFO L225 Difference]: With dead ends: 3169 [2019-09-09 15:54:44,709 INFO L226 Difference]: Without dead ends: 3169 [2019-09-09 15:54:44,711 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 15:54:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2019-09-09 15:54:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 3139. [2019-09-09 15:54:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3139 states. [2019-09-09 15:54:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5495 transitions. [2019-09-09 15:54:44,836 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5495 transitions. Word has length 143 [2019-09-09 15:54:44,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:54:44,839 INFO L475 AbstractCegarLoop]: Abstraction has 3139 states and 5495 transitions. [2019-09-09 15:54:44,839 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:54:44,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5495 transitions. [2019-09-09 15:54:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-09 15:54:44,850 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:54:44,851 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 15:54:44,852 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:54:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:54:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash 918962789, now seen corresponding path program 1 times [2019-09-09 15:54:44,853 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:54:44,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:54:44,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:54:44,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:54:44,857 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:54:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:54:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:54:45,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:54:45,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 15:54:45,072 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:54:45,073 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 15:54:45,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 15:54:45,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-09 15:54:45,074 INFO L87 Difference]: Start difference. First operand 3139 states and 5495 transitions. Second operand 5 states. [2019-09-09 15:54:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:54:51,601 INFO L93 Difference]: Finished difference Result 6468 states and 10316 transitions. [2019-09-09 15:54:51,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 15:54:51,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-09-09 15:54:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:54:51,638 INFO L225 Difference]: With dead ends: 6468 [2019-09-09 15:54:51,639 INFO L226 Difference]: Without dead ends: 6468 [2019-09-09 15:54:51,648 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:54:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2019-09-09 15:54:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 6392. [2019-09-09 15:54:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6392 states. [2019-09-09 15:54:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6392 states to 6392 states and 10143 transitions. [2019-09-09 15:54:51,943 INFO L78 Accepts]: Start accepts. Automaton has 6392 states and 10143 transitions. Word has length 145 [2019-09-09 15:54:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:54:51,945 INFO L475 AbstractCegarLoop]: Abstraction has 6392 states and 10143 transitions. [2019-09-09 15:54:51,946 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 15:54:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 6392 states and 10143 transitions. [2019-09-09 15:54:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-09 15:54:51,950 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:54:51,950 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:54:51,951 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:54:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:54:51,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1451598548, now seen corresponding path program 1 times [2019-09-09 15:54:51,952 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:54:51,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:54:51,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:54:51,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:54:51,954 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:54:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:54:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:54:52,169 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:54:52,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:54:52,169 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:54:52,170 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:54:52,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:54:52,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:54:52,171 INFO L87 Difference]: Start difference. First operand 6392 states and 10143 transitions. Second operand 6 states. [2019-09-09 15:55:03,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:55:03,798 INFO L93 Difference]: Finished difference Result 19356 states and 30069 transitions. [2019-09-09 15:55:03,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 15:55:03,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-09-09 15:55:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:55:03,925 INFO L225 Difference]: With dead ends: 19356 [2019-09-09 15:55:03,925 INFO L226 Difference]: Without dead ends: 19356 [2019-09-09 15:55:03,926 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 15:55:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19356 states. [2019-09-09 15:55:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19356 to 19324. [2019-09-09 15:55:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19324 states. [2019-09-09 15:55:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 29796 transitions. [2019-09-09 15:55:04,516 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 29796 transitions. Word has length 156 [2019-09-09 15:55:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:55:04,517 INFO L475 AbstractCegarLoop]: Abstraction has 19324 states and 29796 transitions. [2019-09-09 15:55:04,518 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:55:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 29796 transitions. [2019-09-09 15:55:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-09-09 15:55:04,521 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:55:04,521 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:55:04,521 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:55:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:55:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1039715536, now seen corresponding path program 1 times [2019-09-09 15:55:04,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:55:04,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:55:04,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:55:04,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:55:04,524 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:55:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:55:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:55:04,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:55:04,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:55:04,737 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:55:04,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:55:04,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:55:04,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:55:04,740 INFO L87 Difference]: Start difference. First operand 19324 states and 29796 transitions. Second operand 6 states. [2019-09-09 15:55:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:55:11,162 INFO L93 Difference]: Finished difference Result 29304 states and 44541 transitions. [2019-09-09 15:55:11,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 15:55:11,163 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2019-09-09 15:55:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:55:11,331 INFO L225 Difference]: With dead ends: 29304 [2019-09-09 15:55:11,332 INFO L226 Difference]: Without dead ends: 29304 [2019-09-09 15:55:11,332 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 15:55:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29304 states. [2019-09-09 15:55:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29304 to 29195. [2019-09-09 15:55:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29195 states. [2019-09-09 15:55:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29195 states to 29195 states and 43307 transitions. [2019-09-09 15:55:13,454 INFO L78 Accepts]: Start accepts. Automaton has 29195 states and 43307 transitions. Word has length 190 [2019-09-09 15:55:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:55:13,455 INFO L475 AbstractCegarLoop]: Abstraction has 29195 states and 43307 transitions. [2019-09-09 15:55:13,455 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:55:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 29195 states and 43307 transitions. [2019-09-09 15:55:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-09-09 15:55:13,462 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:55:13,463 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:55:13,463 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:55:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:55:13,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1780850682, now seen corresponding path program 1 times [2019-09-09 15:55:13,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:55:13,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:55:13,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:55:13,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:55:13,466 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:55:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:55:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 118 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 15:55:13,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:55:13,694 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:55:13,695 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 254 with the following transitions: [2019-09-09 15:55:13,698 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2235], [2243], [2251], [2259], [2267], [2275], [2283], [2291], [2299], [2303], [2305], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2400], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2516], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 15:55:13,785 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:55:13,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:55:38,197 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:55:38,199 INFO L272 AbstractInterpreter]: Visited 113 different actions 113 times. Never merged. Never widened. Performed 270 root evaluator evaluations with a maximum evaluation depth of 16. Performed 270 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 15:55:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:55:38,204 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:56:01,467 INFO L227 lantSequenceWeakener]: Weakened 234 states. On average, predicates are now at 75.97% of their original sizes. [2019-09-09 15:56:01,467 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:56:01,574 INFO L420 sIntCurrentIteration]: We unified 252 AI predicates to 252 [2019-09-09 15:56:01,575 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:56:01,575 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:56:01,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 15:56:01,576 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:56:01,577 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 15:56:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 15:56:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 15:56:01,577 INFO L87 Difference]: Start difference. First operand 29195 states and 43307 transitions. Second operand 11 states. [2019-09-09 16:00:19,858 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.