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/Problem11_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:22:39,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:22:39,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:22:39,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 15:22:39,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 15:22:39,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 15:22:39,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 15:22:39,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 15:22:39,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 15:22:39,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 15:22:39,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 15:22:39,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 15:22:39,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 15:22:39,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 15:22:39,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 15:22:39,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 15:22:39,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 15:22:39,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 15:22:39,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 15:22:39,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 15:22:39,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 15:22:39,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 15:22:39,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 15:22:39,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 15:22:39,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 15:22:39,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 15:22:39,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 15:22:39,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 15:22:39,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 15:22:39,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 15:22:39,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 15:22:39,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 15:22:39,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 15:22:39,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 15:22:39,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 15:22:39,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 15:22:39,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 15:22:39,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 15:22:39,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 15:22:39,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 15:22:39,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 15:22:39,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 15:22:39,757 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:22:39,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:22:39,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:22:39,759 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:22:39,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:22:39,760 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:22:39,760 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:22:39,760 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:22:39,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:22:39,761 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:22:39,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:22:39,762 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:22:39,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:22:39,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:22:39,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:22:39,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:22:39,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:22:39,763 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:22:39,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:22:39,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:22:39,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:22:39,764 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:22:39,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:22:39,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:22:39,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:22:39,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:22:39,765 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:22:39,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:22:39,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:22:39,766 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:22:39,801 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:22:39,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:22:39,818 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:22:39,820 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:22:39,820 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:22:39,821 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label31.c [2019-09-09 15:22:39,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c85df9e59/98688e0dc06848ecb58ad0f6d9f8c428/FLAG952a1d02e [2019-09-09 15:22:40,475 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:22:40,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label31.c [2019-09-09 15:22:40,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c85df9e59/98688e0dc06848ecb58ad0f6d9f8c428/FLAG952a1d02e [2019-09-09 15:22:40,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c85df9e59/98688e0dc06848ecb58ad0f6d9f8c428 [2019-09-09 15:22:40,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:22:40,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:22:40,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:22:40,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:22:40,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:22:40,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:22:40" (1/1) ... [2019-09-09 15:22:40,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@328a7f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:40, skipping insertion in model container [2019-09-09 15:22:40,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:22:40" (1/1) ... [2019-09-09 15:22:40,720 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:22:40,794 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:22:41,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:22:41,500 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:22:41,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:22:41,781 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:22:41,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41 WrapperNode [2019-09-09 15:22:41,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:22:41,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:22:41,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:22:41,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:22:41,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41" (1/1) ... [2019-09-09 15:22:41,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41" (1/1) ... [2019-09-09 15:22:41,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41" (1/1) ... [2019-09-09 15:22:41,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41" (1/1) ... [2019-09-09 15:22:41,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41" (1/1) ... [2019-09-09 15:22:41,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41" (1/1) ... [2019-09-09 15:22:41,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41" (1/1) ... [2019-09-09 15:22:41,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:22:41,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:22:41,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:22:41,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:22:41,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:22:42,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:22:42,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:22:42,042 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:22:42,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:22:42,042 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:22:42,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:22:42,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:22:42,043 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:22:42,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:22:42,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:22:42,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:22:43,964 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:22:43,965 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:22:43,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:22:43 BoogieIcfgContainer [2019-09-09 15:22:43,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:22:43,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:22:43,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:22:43,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:22:43,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:22:40" (1/3) ... [2019-09-09 15:22:43,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497fc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:22:43, skipping insertion in model container [2019-09-09 15:22:43,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:41" (2/3) ... [2019-09-09 15:22:43,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497fc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:22:43, skipping insertion in model container [2019-09-09 15:22:43,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:22:43" (3/3) ... [2019-09-09 15:22:43,990 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label31.c [2019-09-09 15:22:44,002 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:22:44,013 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:22:44,031 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:22:44,071 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:22:44,073 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:22:44,073 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:22:44,073 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:22:44,073 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:22:44,074 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:22:44,074 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:22:44,074 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:22:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-09-09 15:22:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-09 15:22:44,128 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:22:44,129 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:22:44,132 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:22:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:22:44,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1471389198, now seen corresponding path program 1 times [2019-09-09 15:22:44,140 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:22:44,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:44,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:22:44,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:44,198 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:22:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:22:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:22:44,455 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:22:44,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 15:22:44,456 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:22:44,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 15:22:44,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 15:22:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 15:22:44,480 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-09-09 15:22:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:22:45,970 INFO L93 Difference]: Finished difference Result 493 states and 799 transitions. [2019-09-09 15:22:45,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 15:22:45,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-09 15:22:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:22:46,005 INFO L225 Difference]: With dead ends: 493 [2019-09-09 15:22:46,005 INFO L226 Difference]: Without dead ends: 425 [2019-09-09 15:22:46,009 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 15:22:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-09-09 15:22:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-09-09 15:22:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-09-09 15:22:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-09-09 15:22:46,134 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 13 [2019-09-09 15:22:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:22:46,135 INFO L475 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-09-09 15:22:46,135 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 15:22:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-09-09 15:22:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-09 15:22:46,140 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:22:46,141 INFO L399 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] [2019-09-09 15:22:46,141 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:22:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:22:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash 173382134, now seen corresponding path program 1 times [2019-09-09 15:22:46,143 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:22:46,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:46,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:22:46,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:46,146 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:22:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:22:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:22:46,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:22:46,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-09 15:22:46,614 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:22:46,616 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 15:22:46,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 15:22:46,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 15:22:46,618 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 7 states. [2019-09-09 15:22:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:22:48,686 INFO L93 Difference]: Finished difference Result 851 states and 1183 transitions. [2019-09-09 15:22:48,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-09 15:22:48,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 87 [2019-09-09 15:22:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:22:48,701 INFO L225 Difference]: With dead ends: 851 [2019-09-09 15:22:48,701 INFO L226 Difference]: Without dead ends: 851 [2019-09-09 15:22:48,704 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-09-09 15:22:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2019-09-09 15:22:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 616. [2019-09-09 15:22:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2019-09-09 15:22:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 883 transitions. [2019-09-09 15:22:48,749 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 883 transitions. Word has length 87 [2019-09-09 15:22:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:22:48,750 INFO L475 AbstractCegarLoop]: Abstraction has 616 states and 883 transitions. [2019-09-09 15:22:48,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 15:22:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 883 transitions. [2019-09-09 15:22:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-09 15:22:48,759 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:22:48,759 INFO L399 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 15:22:48,760 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:22:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:22:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1579730666, now seen corresponding path program 1 times [2019-09-09 15:22:48,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:22:48,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:48,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:22:48,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:48,762 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:22:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:22:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 15:22:48,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:22:48,965 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:22:48,966 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 160 with the following transitions: [2019-09-09 15:22:48,968 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [514], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-09-09 15:22:49,016 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:22:49,017 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:23:15,739 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:23:15,741 INFO L272 AbstractInterpreter]: Visited 79 different actions 79 times. Never merged. Never widened. Performed 207 root evaluator evaluations with a maximum evaluation depth of 16. Performed 207 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-09-09 15:23:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:23:15,746 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:23:52,690 INFO L227 lantSequenceWeakener]: Weakened 140 states. On average, predicates are now at 73.11% of their original sizes. [2019-09-09 15:23:52,691 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:23:52,810 INFO L420 sIntCurrentIteration]: We unified 158 AI predicates to 158 [2019-09-09 15:23:52,810 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:23:52,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:23:52,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 15:23:52,812 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:23:52,813 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 15:23:52,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 15:23:52,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 15:23:52,814 INFO L87 Difference]: Start difference. First operand 616 states and 883 transitions. Second operand 10 states. [2019-09-09 15:36:03,424 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.