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/Problem15_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:08:55,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:08:55,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:08:55,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 21:08:55,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 21:08:55,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 21:08:55,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 21:08:55,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 21:08:55,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 21:08:55,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 21:08:55,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 21:08:55,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 21:08:55,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:08:55,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:08:55,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:08:55,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:08:55,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:08:55,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:08:55,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:08:55,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:08:55,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:08:55,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:08:55,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:08:55,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:08:55,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 21:08:55,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 21:08:55,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 21:08:55,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 21:08:55,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 21:08:55,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 21:08:55,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 21:08:55,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 21:08:55,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 21:08:55,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 21:08:55,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 21:08:55,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 21:08:55,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 21:08:55,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 21:08:55,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 21:08:55,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 21:08:55,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 21:08:55,794 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 21:08:55,819 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:08:55,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:08:55,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:08:55,821 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:08:55,821 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:08:55,822 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:08:55,822 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:08:55,822 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:08:55,822 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:08:55,822 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:08:55,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:08:55,825 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:08:55,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:08:55,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:08:55,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:08:55,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:08:55,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:08:55,826 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:08:55,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:08:55,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:08:55,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:08:55,827 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:08:55,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:08:55,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:08:55,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:08:55,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:08:55,829 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:08:55,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:08:55,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:08:55,829 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:08:55,882 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:08:55,900 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:08:55,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:08:55,905 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:08:55,906 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:08:55,907 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-10-02 21:08:55,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/602fbed64/2f7769309f064c168b493334bc280636/FLAG6f4ee6033 [2019-10-02 21:08:56,629 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:08:56,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-10-02 21:08:56,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/602fbed64/2f7769309f064c168b493334bc280636/FLAG6f4ee6033 [2019-10-02 21:08:56,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/602fbed64/2f7769309f064c168b493334bc280636 [2019-10-02 21:08:56,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:08:56,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:08:56,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:08:56,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:08:56,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:08:56,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:08:56" (1/1) ... [2019-10-02 21:08:56,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3d015c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:56, skipping insertion in model container [2019-10-02 21:08:56,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:08:56" (1/1) ... [2019-10-02 21:08:56,830 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:08:56,907 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:08:57,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:08:57,781 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:08:58,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:08:58,187 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:08:58,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58 WrapperNode [2019-10-02 21:08:58,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:08:58,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:08:58,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:08:58,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:08:58,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58" (1/1) ... [2019-10-02 21:08:58,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58" (1/1) ... [2019-10-02 21:08:58,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58" (1/1) ... [2019-10-02 21:08:58,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58" (1/1) ... [2019-10-02 21:08:58,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58" (1/1) ... [2019-10-02 21:08:58,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58" (1/1) ... [2019-10-02 21:08:58,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58" (1/1) ... [2019-10-02 21:08:58,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:08:58,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:08:58,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:08:58,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:08:58,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58" (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 21:08:58,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:08:58,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:08:58,452 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:08:58,452 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:08:58,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:08:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:08:58,453 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:08:58,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:08:58,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:08:58,453 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:08:58,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:08:58,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:08:58,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:09:01,582 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:09:01,583 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:09:01,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:09:01 BoogieIcfgContainer [2019-10-02 21:09:01,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:09:01,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:09:01,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:09:01,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:09:01,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:08:56" (1/3) ... [2019-10-02 21:09:01,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a900a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:09:01, skipping insertion in model container [2019-10-02 21:09:01,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:08:58" (2/3) ... [2019-10-02 21:09:01,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a900a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:09:01, skipping insertion in model container [2019-10-02 21:09:01,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:09:01" (3/3) ... [2019-10-02 21:09:01,595 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label43.c [2019-10-02 21:09:01,606 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:09:01,618 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:09:01,636 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:09:01,669 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:09:01,669 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:09:01,670 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:09:01,670 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:09:01,670 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:09:01,670 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:09:01,670 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:09:01,670 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:09:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-02 21:09:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-02 21:09:01,727 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:09:01,729 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] [2019-10-02 21:09:01,731 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:09:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:09:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash 402824616, now seen corresponding path program 1 times [2019-10-02 21:09:01,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:09:01,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:01,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:09:01,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:01,833 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:09:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:09:02,195 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 21:09:02,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:09:02,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:09:02,198 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:09:02,204 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:09:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:09:02,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:09:02,222 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-02 21:09:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:09:07,515 INFO L93 Difference]: Finished difference Result 1123 states and 1943 transitions. [2019-10-02 21:09:07,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:09:07,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-10-02 21:09:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:09:07,553 INFO L225 Difference]: With dead ends: 1123 [2019-10-02 21:09:07,553 INFO L226 Difference]: Without dead ends: 1036 [2019-10-02 21:09:07,554 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:09:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-02 21:09:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-10-02 21:09:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-02 21:09:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-10-02 21:09:07,652 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 64 [2019-10-02 21:09:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:09:07,652 INFO L475 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-10-02 21:09:07,653 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:09:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-10-02 21:09:07,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-02 21:09:07,659 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:09:07,660 INFO L411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:09:07,660 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:09:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:09:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1979650764, now seen corresponding path program 1 times [2019-10-02 21:09:07,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:09:07,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:07,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:09:07,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:07,663 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:09:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:09:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:09:07,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:09:07,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:09:07,818 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:09:07,823 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:09:07,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:09:07,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:09:07,824 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-10-02 21:09:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:09:11,782 INFO L93 Difference]: Finished difference Result 1941 states and 2980 transitions. [2019-10-02 21:09:11,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:09:11,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-02 21:09:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:09:11,801 INFO L225 Difference]: With dead ends: 1941 [2019-10-02 21:09:11,801 INFO L226 Difference]: Without dead ends: 1941 [2019-10-02 21:09:11,803 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:09:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2019-10-02 21:09:11,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1936. [2019-10-02 21:09:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2019-10-02 21:09:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2971 transitions. [2019-10-02 21:09:11,914 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2971 transitions. Word has length 133 [2019-10-02 21:09:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:09:11,917 INFO L475 AbstractCegarLoop]: Abstraction has 1936 states and 2971 transitions. [2019-10-02 21:09:11,917 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:09:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2971 transitions. [2019-10-02 21:09:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-02 21:09:11,930 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:09:11,930 INFO L411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:11,931 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:09:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:09:11,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1305643434, now seen corresponding path program 1 times [2019-10-02 21:09:11,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:09:11,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:11,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:09:11,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:11,936 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:09:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:09:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:09:12,239 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:09:12,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 21:09:12,239 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:09:12,240 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 21:09:12,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 21:09:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:09:12,241 INFO L87 Difference]: Start difference. First operand 1936 states and 2971 transitions. Second operand 5 states. [2019-10-02 21:09:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:09:16,996 INFO L93 Difference]: Finished difference Result 3566 states and 5229 transitions. [2019-10-02 21:09:16,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 21:09:16,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-10-02 21:09:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:09:17,022 INFO L225 Difference]: With dead ends: 3566 [2019-10-02 21:09:17,022 INFO L226 Difference]: Without dead ends: 3566 [2019-10-02 21:09:17,022 INFO L640 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 [2019-10-02 21:09:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2019-10-02 21:09:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3546. [2019-10-02 21:09:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2019-10-02 21:09:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5185 transitions. [2019-10-02 21:09:17,148 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5185 transitions. Word has length 214 [2019-10-02 21:09:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:09:17,150 INFO L475 AbstractCegarLoop]: Abstraction has 3546 states and 5185 transitions. [2019-10-02 21:09:17,150 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 21:09:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5185 transitions. [2019-10-02 21:09:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-02 21:09:17,158 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:09:17,158 INFO L411 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, 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] [2019-10-02 21:09:17,158 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:09:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:09:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash 40242713, now seen corresponding path program 1 times [2019-10-02 21:09:17,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:09:17,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:17,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:09:17,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:09:17,162 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:09:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:09:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 114 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 21:09:17,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:09:17,441 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:09:17,442 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2019-10-02 21:09:17,445 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [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], [493], [495], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [671], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-10-02 21:09:17,503 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:09:17,503 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:09:20,078 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:09:20,080 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. [2019-10-02 21:09:20,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:09:20,085 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:09:22,628 INFO L227 lantSequenceWeakener]: Weakened 218 states. On average, predicates are now at 78.36% of their original sizes. [2019-10-02 21:09:22,628 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:09:22,705 INFO L420 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2019-10-02 21:09:22,705 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:09:22,706 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:09:22,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 21:09:22,707 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:09:22,711 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 21:09:22,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 21:09:22,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 21:09:22,712 INFO L87 Difference]: Start difference. First operand 3546 states and 5185 transitions. Second operand 10 states. [2019-10-02 21:09:29,968 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.