java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:34:26,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:34:26,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:34:26,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 22:34:26,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 22:34:26,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 22:34:26,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 22:34:26,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 22:34:26,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 22:34:26,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 22:34:26,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 22:34:26,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 22:34:26,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 22:34:26,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 22:34:26,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 22:34:26,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 22:34:26,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 22:34:26,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 22:34:26,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 22:34:26,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 22:34:26,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 22:34:26,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 22:34:26,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 22:34:26,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 22:34:26,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 22:34:26,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 22:34:26,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 22:34:26,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 22:34:26,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 22:34:26,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 22:34:26,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 22:34:26,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 22:34:26,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 22:34:26,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 22:34:26,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 22:34:26,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 22:34:26,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 22:34:26,806 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:34:26,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:34:26,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:34:26,807 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:34:26,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:34:26,808 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:34:26,808 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:34:26,808 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:34:26,809 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:34:26,809 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:34:26,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:34:26,810 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:34:26,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:34:26,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:34:26,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:34:26,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:34:26,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:34:26,811 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:34:26,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:34:26,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:34:26,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:34:26,812 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:34:26,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:34:26,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:34:26,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:34:26,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:34:26,813 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:34:26,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:34:26,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:34:26,813 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:34:26,841 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:34:26,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:34:26,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:34:26,864 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:34:26,865 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:34:26,866 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-09-09 22:34:26,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97dada59f/df49d05840d242159f5bfb394ba00326/FLAG7e65c6cae [2019-09-09 22:34:27,727 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:34:27,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-09-09 22:34:27,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97dada59f/df49d05840d242159f5bfb394ba00326/FLAG7e65c6cae [2019-09-09 22:34:28,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97dada59f/df49d05840d242159f5bfb394ba00326 [2019-09-09 22:34:28,225 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:34:28,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:34:28,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:34:28,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:34:28,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:34:28,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:34:28" (1/1) ... [2019-09-09 22:34:28,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b03c5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:28, skipping insertion in model container [2019-09-09 22:34:28,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:34:28" (1/1) ... [2019-09-09 22:34:28,250 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:34:28,364 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:34:29,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:34:29,842 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:34:30,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:34:30,331 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:34:30,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30 WrapperNode [2019-09-09 22:34:30,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:34:30,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:34:30,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:34:30,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:34:30,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30" (1/1) ... [2019-09-09 22:34:30,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30" (1/1) ... [2019-09-09 22:34:30,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30" (1/1) ... [2019-09-09 22:34:30,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30" (1/1) ... [2019-09-09 22:34:30,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30" (1/1) ... [2019-09-09 22:34:30,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30" (1/1) ... [2019-09-09 22:34:30,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30" (1/1) ... [2019-09-09 22:34:30,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:34:30,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:34:30,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:34:30,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:34:30,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:34:30,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:34:30,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:34:30,701 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:34:30,701 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:34:30,701 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:34:30,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:34:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:34:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:34:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:34:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:34:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:34:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:34:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:34:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:34:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:34:34,620 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:34:34,621 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:34:34,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:34:34 BoogieIcfgContainer [2019-09-09 22:34:34,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:34:34,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:34:34,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:34:34,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:34:34,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:34:28" (1/3) ... [2019-09-09 22:34:34,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d53e878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:34:34, skipping insertion in model container [2019-09-09 22:34:34,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:34:30" (2/3) ... [2019-09-09 22:34:34,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d53e878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:34:34, skipping insertion in model container [2019-09-09 22:34:34,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:34:34" (3/3) ... [2019-09-09 22:34:34,634 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label42.c [2019-09-09 22:34:34,648 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:34:34,659 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:34:34,686 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:34:34,727 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:34:34,728 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:34:34,728 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:34:34,729 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:34:34,729 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:34:34,729 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:34:34,729 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:34:34,730 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:34:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:34:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-09 22:34:34,814 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:34:34,816 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] [2019-09-09 22:34:34,818 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:34:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:34:34,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1002146950, now seen corresponding path program 1 times [2019-09-09 22:34:34,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:34:34,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:34:34,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:34:34,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:34:34,910 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:34:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:34:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:34:35,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:34:35,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:34:35,378 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:34:35,386 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:34:35,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:34:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:34:35,416 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:34:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:34:40,290 INFO L93 Difference]: Finished difference Result 1480 states and 2747 transitions. [2019-09-09 22:34:40,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:34:40,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2019-09-09 22:34:40,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:34:40,326 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:34:40,327 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:34:40,328 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:34:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:34:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:34:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:34:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-09-09 22:34:40,473 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 55 [2019-09-09 22:34:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:34:40,473 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-09-09 22:34:40,474 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:34:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-09-09 22:34:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-09-09 22:34:40,487 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:34:40,488 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:34:40,489 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:34:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:34:40,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1421869466, now seen corresponding path program 1 times [2019-09-09 22:34:40,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:34:40,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:34:40,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:34:40,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:34:40,494 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:34:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:34:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:34:40,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:34:40,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:34:40,770 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:34:40,772 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:34:40,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:34:40,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:34:40,773 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-09-09 22:34:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:34:46,552 INFO L93 Difference]: Finished difference Result 2888 states and 4815 transitions. [2019-09-09 22:34:46,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:34:46,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-09-09 22:34:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:34:46,581 INFO L225 Difference]: With dead ends: 2888 [2019-09-09 22:34:46,581 INFO L226 Difference]: Without dead ends: 2888 [2019-09-09 22:34:46,582 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 22:34:46,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-09-09 22:34:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-09-09 22:34:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-09-09 22:34:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-09-09 22:34:46,696 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 129 [2019-09-09 22:34:46,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:34:46,699 INFO L475 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-09-09 22:34:46,699 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:34:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-09-09 22:34:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 22:34:46,713 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:34:46,714 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:34:46,714 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:34:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:34:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1325380034, now seen corresponding path program 1 times [2019-09-09 22:34:46,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:34:46,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:34:46,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:34:46,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:34:46,719 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:34:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:34:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:34:46,902 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:34:46,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:34:46,903 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:34:46,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:34:46,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:34:46,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:34:46,906 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-09-09 22:34:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:34:51,971 INFO L93 Difference]: Finished difference Result 4347 states and 6144 transitions. [2019-09-09 22:34:51,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:34:51,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-09-09 22:34:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:34:52,002 INFO L225 Difference]: With dead ends: 4347 [2019-09-09 22:34:52,003 INFO L226 Difference]: Without dead ends: 4347 [2019-09-09 22:34:52,003 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 22:34:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-09-09 22:34:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4331. [2019-09-09 22:34:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-09-09 22:34:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6101 transitions. [2019-09-09 22:34:52,153 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6101 transitions. Word has length 141 [2019-09-09 22:34:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:34:52,155 INFO L475 AbstractCegarLoop]: Abstraction has 4331 states and 6101 transitions. [2019-09-09 22:34:52,155 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:34:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6101 transitions. [2019-09-09 22:34:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-09-09 22:34:52,158 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:34:52,158 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:34:52,159 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:34:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:34:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 163779891, now seen corresponding path program 1 times [2019-09-09 22:34:52,160 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:34:52,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:34:52,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:34:52,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:34:52,161 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:34:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:34:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:34:52,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:34:52,421 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:34:52,422 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 167 with the following transitions: [2019-09-09 22:34:52,425 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1951], [1959], [1967], [1971], [1973], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2284], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:34:52,518 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:34:52,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:34:59,172 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:34:59,174 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Performed 269 root evaluator evaluations with a maximum evaluation depth of 13. Performed 269 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:34:59,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:34:59,179 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:35:03,884 INFO L227 lantSequenceWeakener]: Weakened 152 states. On average, predicates are now at 78.57% of their original sizes. [2019-09-09 22:35:03,885 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:35:03,965 INFO L420 sIntCurrentIteration]: We unified 165 AI predicates to 165 [2019-09-09 22:35:03,967 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:35:03,967 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:35:03,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 22:35:03,968 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:35:03,968 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:35:03,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:35:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:35:03,969 INFO L87 Difference]: Start difference. First operand 4331 states and 6101 transitions. Second operand 10 states. [2019-09-09 22:36:48,374 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.