java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 16:30:42,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 16:30:42,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 16:30:42,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 16:30:42,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 16:30:42,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 16:30:42,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 16:30:42,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 16:30:42,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 16:30:42,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 16:30:42,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 16:30:42,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 16:30:42,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 16:30:42,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 16:30:42,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 16:30:42,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 16:30:42,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 16:30:42,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 16:30:42,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 16:30:42,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 16:30:42,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 16:30:42,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 16:30:42,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 16:30:42,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 16:30:42,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 16:30:42,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 16:30:42,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 16:30:42,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 16:30:42,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 16:30:42,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 16:30:42,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 16:30:42,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 16:30:42,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 16:30:42,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 16:30:42,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 16:30:42,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 16:30:42,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 16:30:42,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 16:30:42,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 16:30:42,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 16:30:42,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 16:30:42,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 16:30:42,930 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 16:30:42,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 16:30:42,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 16:30:42,931 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 16:30:42,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 16:30:42,932 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 16:30:42,932 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 16:30:42,932 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 16:30:42,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 16:30:42,933 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 16:30:42,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 16:30:42,934 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 16:30:42,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 16:30:42,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 16:30:42,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 16:30:42,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 16:30:42,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 16:30:42,935 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 16:30:42,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 16:30:42,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 16:30:42,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 16:30:42,936 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 16:30:42,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 16:30:42,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:30:42,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 16:30:42,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 16:30:42,937 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 16:30:42,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 16:30:42,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 16:30:42,938 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 16:30:42,984 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 16:30:42,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 16:30:43,001 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 16:30:43,003 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 16:30:43,003 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 16:30:43,004 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label10.c [2019-10-02 16:30:43,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7853b883e/a86d119b692341f694d279b8b0591749/FLAG9a256591d [2019-10-02 16:30:43,662 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 16:30:43,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label10.c [2019-10-02 16:30:43,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7853b883e/a86d119b692341f694d279b8b0591749/FLAG9a256591d [2019-10-02 16:30:43,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7853b883e/a86d119b692341f694d279b8b0591749 [2019-10-02 16:30:43,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 16:30:43,920 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 16:30:43,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 16:30:43,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 16:30:43,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 16:30:43,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:43,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bde006e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43, skipping insertion in model container [2019-10-02 16:30:43,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:43,939 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 16:30:43,994 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 16:30:44,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:30:44,557 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 16:30:44,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:30:44,717 INFO L192 MainTranslator]: Completed translation [2019-10-02 16:30:44,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44 WrapperNode [2019-10-02 16:30:44,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 16:30:44,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 16:30:44,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 16:30:44,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 16:30:44,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... [2019-10-02 16:30:44,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 16:30:44,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 16:30:44,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 16:30:44,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 16:30:44,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:30:44,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 16:30:44,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 16:30:44,922 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 16:30:44,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 16:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 16:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 16:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 16:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 16:30:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 16:30:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 16:30:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 16:30:46,090 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 16:30:46,091 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 16:30:46,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:30:46 BoogieIcfgContainer [2019-10-02 16:30:46,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 16:30:46,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 16:30:46,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 16:30:46,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 16:30:46,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 04:30:43" (1/3) ... [2019-10-02 16:30:46,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e49e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:30:46, skipping insertion in model container [2019-10-02 16:30:46,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:44" (2/3) ... [2019-10-02 16:30:46,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e49e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:30:46, skipping insertion in model container [2019-10-02 16:30:46,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:30:46" (3/3) ... [2019-10-02 16:30:46,103 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label10.c [2019-10-02 16:30:46,114 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 16:30:46,124 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 16:30:46,144 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 16:30:46,181 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 16:30:46,182 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 16:30:46,182 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 16:30:46,183 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 16:30:46,183 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 16:30:46,183 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 16:30:46,183 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 16:30:46,183 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 16:30:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 16:30:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-02 16:30:46,246 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:46,248 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:30:46,250 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:46,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:46,255 INFO L82 PathProgramCache]: Analyzing trace with hash 262180542, now seen corresponding path program 1 times [2019-10-02 16:30:46,257 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:46,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:46,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:46,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:46,307 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:46,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:46,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:30:46,802 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:46,811 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:30:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:30:46,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:30:46,832 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-02 16:30:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:47,755 INFO L93 Difference]: Finished difference Result 346 states and 515 transitions. [2019-10-02 16:30:47,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:30:47,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2019-10-02 16:30:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:47,782 INFO L225 Difference]: With dead ends: 346 [2019-10-02 16:30:47,782 INFO L226 Difference]: Without dead ends: 278 [2019-10-02 16:30:47,785 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:30:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-02 16:30:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-02 16:30:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 16:30:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-10-02 16:30:47,902 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 116 [2019-10-02 16:30:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:47,904 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-10-02 16:30:47,904 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:30:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-10-02 16:30:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-02 16:30:47,917 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:47,920 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:30:47,921 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:47,923 INFO L82 PathProgramCache]: Analyzing trace with hash -363877541, now seen corresponding path program 1 times [2019-10-02 16:30:47,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:47,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:47,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:47,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:47,926 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:48,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:48,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 16:30:48,121 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:48,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 16:30:48,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 16:30:48,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 16:30:48,125 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2019-10-02 16:30:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:48,926 INFO L93 Difference]: Finished difference Result 568 states and 808 transitions. [2019-10-02 16:30:48,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 16:30:48,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2019-10-02 16:30:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:48,933 INFO L225 Difference]: With dead ends: 568 [2019-10-02 16:30:48,934 INFO L226 Difference]: Without dead ends: 568 [2019-10-02 16:30:48,935 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 16:30:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-02 16:30:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2019-10-02 16:30:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-02 16:30:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 787 transitions. [2019-10-02 16:30:48,964 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 787 transitions. Word has length 125 [2019-10-02 16:30:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:48,964 INFO L475 AbstractCegarLoop]: Abstraction has 558 states and 787 transitions. [2019-10-02 16:30:48,964 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 16:30:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 787 transitions. [2019-10-02 16:30:48,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-02 16:30:48,968 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:48,968 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:30:48,969 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash 403851526, now seen corresponding path program 1 times [2019-10-02 16:30:48,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:48,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:48,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:48,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:48,971 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:49,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 16:30:49,138 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 16:30:49,139 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 151 with the following transitions: [2019-10-02 16:30:49,142 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [65], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [162], [166], [170], [174], [178], [182], [186], [190], [194], [198], [202], [206], [210], [214], [218], [222], [226], [230], [234], [238], [242], [246], [250], [254], [258], [262], [266], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [489], [497], [505], [513], [521], [529], [537], [545], [553], [561], [569], [573], [575], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 16:30:49,208 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 16:30:49,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)