java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label52_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 22:50:40,847 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 22:50:40,849 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 22:50:40,866 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 22:50:40,866 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 22:50:40,867 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 22:50:40,871 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 22:50:40,873 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 22:50:40,876 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 22:50:40,882 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 22:50:40,885 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 22:50:40,886 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 22:50:40,886 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 22:50:40,889 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 22:50:40,891 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 22:50:40,892 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 22:50:40,893 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 22:50:40,897 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 22:50:40,900 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 22:50:40,903 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 22:50:40,904 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 22:50:40,906 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 22:50:40,909 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 22:50:40,923 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 22:50:40,948 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 22:50:40,948 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 22:50:40,949 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 22:50:40,949 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 22:50:40,949 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 22:50:40,949 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 22:50:40,950 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 22:50:40,950 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 22:50:40,950 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 22:50:40,951 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 22:50:40,951 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 22:50:40,951 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 22:50:40,952 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 22:50:40,952 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 22:50:40,952 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 22:50:40,952 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 22:50:40,953 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 22:50:40,954 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 22:50:40,954 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 22:50:40,955 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 22:50:40,955 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 22:50:40,955 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 22:50:40,955 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 22:50:40,955 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 22:50:40,956 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 22:50:40,956 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 22:50:40,956 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 22:50:40,957 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 22:50:40,957 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 22:50:40,957 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 22:50:40,957 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 22:50:40,957 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 22:50:40,958 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 22:50:40,958 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 22:50:41,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 22:50:41,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 22:50:41,043 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 22:50:41,044 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 22:50:41,045 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 22:50:41,045 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label52_false-unreach-call.c [2018-10-23 22:50:41,113 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c1034ca0e/8d280201b7ac40ca9aee64c90fce8552/FLAGd38638cd0 [2018-10-23 22:50:41,844 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 22:50:41,845 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label52_false-unreach-call.c [2018-10-23 22:50:41,866 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c1034ca0e/8d280201b7ac40ca9aee64c90fce8552/FLAGd38638cd0 [2018-10-23 22:50:41,882 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c1034ca0e/8d280201b7ac40ca9aee64c90fce8552 [2018-10-23 22:50:41,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 22:50:41,895 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 22:50:41,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 22:50:41,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 22:50:41,900 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 22:50:41,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:50:41" (1/1) ... [2018-10-23 22:50:41,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3887bcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:41, skipping insertion in model container [2018-10-23 22:50:41,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:50:41" (1/1) ... [2018-10-23 22:50:41,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 22:50:42,041 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 22:50:42,983 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:50:42,988 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 22:50:43,417 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:50:43,443 INFO L193 MainTranslator]: Completed translation [2018-10-23 22:50:43,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43 WrapperNode [2018-10-23 22:50:43,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 22:50:43,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 22:50:43,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 22:50:43,445 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 22:50:43,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... [2018-10-23 22:50:43,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... [2018-10-23 22:50:43,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 22:50:43,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 22:50:43,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 22:50:43,860 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 22:50:43,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... [2018-10-23 22:50:43,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... [2018-10-23 22:50:43,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... [2018-10-23 22:50:43,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... [2018-10-23 22:50:44,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... [2018-10-23 22:50:44,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... [2018-10-23 22:50:44,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... [2018-10-23 22:50:44,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 22:50:44,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 22:50:44,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 22:50:44,188 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 22:50:44,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 22:50:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 22:50:44,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 22:50:44,261 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-23 22:50:44,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-23 22:50:44,261 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 22:50:44,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 22:50:44,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 22:50:44,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 22:50:44,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 22:50:44,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 22:50:58,576 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 22:50:58,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:50:58 BoogieIcfgContainer [2018-10-23 22:50:58,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 22:50:58,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 22:50:58,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 22:50:58,582 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 22:50:58,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:50:41" (1/3) ... [2018-10-23 22:50:58,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1f07fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:50:58, skipping insertion in model container [2018-10-23 22:50:58,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:43" (2/3) ... [2018-10-23 22:50:58,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1f07fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:50:58, skipping insertion in model container [2018-10-23 22:50:58,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:50:58" (3/3) ... [2018-10-23 22:50:58,586 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label52_false-unreach-call.c [2018-10-23 22:50:58,595 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 22:50:58,604 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 22:50:58,622 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 22:50:58,665 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 22:50:58,665 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 22:50:58,665 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 22:50:58,665 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 22:50:58,665 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 22:50:58,666 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 22:50:58,666 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 22:50:58,666 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 22:50:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-23 22:50:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 22:50:58,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:50:58,708 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:50:58,711 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:50:58,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:50:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash -551106482, now seen corresponding path program 1 times [2018-10-23 22:50:58,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:50:58,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:58,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:58,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:58,773 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:50:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:50:58,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:50:58,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 22:50:58,993 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:50:58,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 22:50:59,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 22:50:59,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 22:50:59,018 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 3 states. [2018-10-23 22:51:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:51:07,152 INFO L93 Difference]: Finished difference Result 1678 states and 3070 transitions. [2018-10-23 22:51:07,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 22:51:07,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-23 22:51:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:51:07,186 INFO L225 Difference]: With dead ends: 1678 [2018-10-23 22:51:07,186 INFO L226 Difference]: Without dead ends: 1072 [2018-10-23 22:51:07,197 INFO L605 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 [2018-10-23 22:51:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2018-10-23 22:51:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1066. [2018-10-23 22:51:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2018-10-23 22:51:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1679 transitions. [2018-10-23 22:51:07,320 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1679 transitions. Word has length 13 [2018-10-23 22:51:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:51:07,320 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 1679 transitions. [2018-10-23 22:51:07,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 22:51:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1679 transitions. [2018-10-23 22:51:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-23 22:51:07,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:51:07,325 INFO L375 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] [2018-10-23 22:51:07,326 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:51:07,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:51:07,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065119, now seen corresponding path program 1 times [2018-10-23 22:51:07,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:51:07,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:51:07,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:51:07,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:51:07,328 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:51:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:51:07,725 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:51:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:51:07,789 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:51:07,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 22:51:07,789 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:51:07,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 22:51:07,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 22:51:07,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 22:51:07,792 INFO L87 Difference]: Start difference. First operand 1066 states and 1679 transitions. Second operand 5 states. [2018-10-23 22:51:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:51:16,145 INFO L93 Difference]: Finished difference Result 3071 states and 4917 transitions. [2018-10-23 22:51:16,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:51:16,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2018-10-23 22:51:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:51:16,162 INFO L225 Difference]: With dead ends: 3071 [2018-10-23 22:51:16,163 INFO L226 Difference]: Without dead ends: 2011 [2018-10-23 22:51:16,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:51:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2018-10-23 22:51:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1985. [2018-10-23 22:51:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1985 states. [2018-10-23 22:51:16,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 2933 transitions. [2018-10-23 22:51:16,256 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 2933 transitions. Word has length 85 [2018-10-23 22:51:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:51:16,257 INFO L481 AbstractCegarLoop]: Abstraction has 1985 states and 2933 transitions. [2018-10-23 22:51:16,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 22:51:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 2933 transitions. [2018-10-23 22:51:16,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-23 22:51:16,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:51:16,261 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:51:16,261 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:51:16,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:51:16,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1334448071, now seen corresponding path program 1 times [2018-10-23 22:51:16,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:51:16,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:51:16,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:51:16,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:51:16,263 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:51:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:51:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:51:16,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:51:16,956 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:51:16,957 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 89 with the following transitions: [2018-10-23 22:51:16,959 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [714], [716], [719], [727], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-23 22:51:17,031 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:51:17,031 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:51:18,375 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:51:36,774 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 22:51:36,775 INFO L272 AbstractInterpreter]: Visited 83 different actions 543 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-23 22:51:36,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:51:36,792 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 22:51:36,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:51:36,792 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 22:51:36,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:51:36,803 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 22:51:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:51:36,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 22:52:03,672 WARN L179 SmtUtils]: Spent 24.25 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-23 22:52:23,877 WARN L179 SmtUtils]: Spent 16.09 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-23 22:52:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:52:23,979 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 22:52:28,866 WARN L179 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-23 22:52:28,939 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-23 22:52:31,650 WARN L179 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-23 22:52:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:52:32,036 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-23 22:52:32,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2018-10-23 22:52:32,036 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:52:32,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:52:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:52:32,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=136, Unknown=4, NotChecked=0, Total=182 [2018-10-23 22:52:32,040 INFO L87 Difference]: Start difference. First operand 1985 states and 2933 transitions. Second operand 6 states. [2018-10-23 22:53:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:53:56,340 INFO L93 Difference]: Finished difference Result 7620 states and 11632 transitions. [2018-10-23 22:53:56,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 22:53:56,342 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2018-10-23 22:53:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:53:56,382 INFO L225 Difference]: With dead ends: 7620 [2018-10-23 22:53:56,382 INFO L226 Difference]: Without dead ends: 5641 [2018-10-23 22:53:56,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=42, Invalid=136, Unknown=4, NotChecked=0, Total=182 [2018-10-23 22:53:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2018-10-23 22:53:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 5596. [2018-10-23 22:53:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5596 states. [2018-10-23 22:53:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 8080 transitions. [2018-10-23 22:53:56,559 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 8080 transitions. Word has length 88 [2018-10-23 22:53:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:53:56,559 INFO L481 AbstractCegarLoop]: Abstraction has 5596 states and 8080 transitions. [2018-10-23 22:53:56,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:53:56,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 8080 transitions. [2018-10-23 22:53:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-23 22:53:56,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:53:56,562 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:53:56,562 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:53:56,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:53:56,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2054508945, now seen corresponding path program 1 times [2018-10-23 22:53:56,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:53:56,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:53:56,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:53:56,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:53:56,564 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:53:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:53:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:53:56,724 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:53:56,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:53:56,724 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:53:56,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:53:56,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:53:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:53:56,726 INFO L87 Difference]: Start difference. First operand 5596 states and 8080 transitions. Second operand 6 states. [2018-10-23 22:54:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:54:05,378 INFO L93 Difference]: Finished difference Result 14380 states and 21339 transitions. [2018-10-23 22:54:05,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:54:05,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2018-10-23 22:54:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:54:05,429 INFO L225 Difference]: With dead ends: 14380 [2018-10-23 22:54:05,430 INFO L226 Difference]: Without dead ends: 8790 [2018-10-23 22:54:05,455 INFO L605 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 [2018-10-23 22:54:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8790 states. [2018-10-23 22:54:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8790 to 8721. [2018-10-23 22:54:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8721 states. [2018-10-23 22:54:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8721 states to 8721 states and 11513 transitions. [2018-10-23 22:54:05,696 INFO L78 Accepts]: Start accepts. Automaton has 8721 states and 11513 transitions. Word has length 93 [2018-10-23 22:54:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:54:05,697 INFO L481 AbstractCegarLoop]: Abstraction has 8721 states and 11513 transitions. [2018-10-23 22:54:05,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:54:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8721 states and 11513 transitions. [2018-10-23 22:54:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-23 22:54:05,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:54:05,703 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:54:05,703 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:54:05,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:54:05,704 INFO L82 PathProgramCache]: Analyzing trace with hash -31491841, now seen corresponding path program 1 times [2018-10-23 22:54:05,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:54:05,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:54:05,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:54:05,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:54:05,710 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:54:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:54:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:54:06,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:54:06,024 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:54:06,024 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 102 with the following transitions: [2018-10-23 22:54:06,025 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [714], [716], [719], [727], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-23 22:54:06,031 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:54:06,031 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:54:07,096 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:54:14,752 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 22:54:14,753 INFO L272 AbstractInterpreter]: Visited 96 different actions 273 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-23 22:54:14,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:54:14,788 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 22:54:14,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:54:14,788 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 22:54:14,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:54:14,802 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 22:54:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:54:14,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 22:54:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:54:15,038 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 22:54:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:54:15,432 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:54:15,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-23 22:54:15,432 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:54:15,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 22:54:15,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 22:54:15,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:54:15,433 INFO L87 Difference]: Start difference. First operand 8721 states and 11513 transitions. Second operand 3 states. [2018-10-23 22:54:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:54:20,001 INFO L93 Difference]: Finished difference Result 17436 states and 23058 transitions. [2018-10-23 22:54:20,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 22:54:20,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2018-10-23 22:54:20,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:54:20,062 INFO L225 Difference]: With dead ends: 17436 [2018-10-23 22:54:20,062 INFO L226 Difference]: Without dead ends: 8721 [2018-10-23 22:54:20,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:54:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8721 states. [2018-10-23 22:54:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8721 to 8721. [2018-10-23 22:54:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8721 states. [2018-10-23 22:54:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8721 states to 8721 states and 10974 transitions. [2018-10-23 22:54:20,308 INFO L78 Accepts]: Start accepts. Automaton has 8721 states and 10974 transitions. Word has length 101 [2018-10-23 22:54:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:54:20,308 INFO L481 AbstractCegarLoop]: Abstraction has 8721 states and 10974 transitions. [2018-10-23 22:54:20,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 22:54:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 8721 states and 10974 transitions. [2018-10-23 22:54:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-23 22:54:20,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:54:20,315 INFO L375 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, 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] [2018-10-23 22:54:20,315 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:54:20,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:54:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1050846696, now seen corresponding path program 1 times [2018-10-23 22:54:20,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:54:20,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:54:20,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:54:20,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:54:20,324 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:54:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:54:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-23 22:54:20,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:54:20,845 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:54:20,845 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2018-10-23 22:54:20,846 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [714], [716], [719], [727], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-23 22:54:20,850 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:54:20,851 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:54:21,989 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-10-23 22:54:44,513 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-23 22:54:44,513 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-23 22:54:44,514 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 22:54:44,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:54:44,514 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 22:54:44,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:54:44,533 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 22:54:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:54:44,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 22:54:44,610 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 22:54:44,811 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 22:54:44,812 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 22:54:44,817 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 22:54:44,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:54:44 BoogieIcfgContainer [2018-10-23 22:54:44,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 22:54:44,819 INFO L168 Benchmark]: Toolchain (without parser) took 242925.34 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -59.7 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-23 22:54:44,820 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 22:54:44,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1548.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 140.1 MB). Peak memory consumption was 140.1 MB. Max. memory is 7.1 GB. [2018-10-23 22:54:44,822 INFO L168 Benchmark]: Boogie Procedure Inliner took 414.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -917.9 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-23 22:54:44,822 INFO L168 Benchmark]: Boogie Preprocessor took 327.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2018-10-23 22:54:44,823 INFO L168 Benchmark]: RCFGBuilder took 14389.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 477.2 MB). Peak memory consumption was 477.2 MB. Max. memory is 7.1 GB. [2018-10-23 22:54:44,824 INFO L168 Benchmark]: TraceAbstraction took 226239.82 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.7 GB in the beginning and 1.5 GB in the end (delta: 212.5 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-23 22:54:44,829 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1548.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 140.1 MB). Peak memory consumption was 140.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 414.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -917.9 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 327.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14389.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 477.2 MB). Peak memory consumption was 477.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 226239.82 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.7 GB in the beginning and 1.5 GB in the end (delta: 212.5 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 26). Cancelled while BasicCegarLoop was analyzing trace of length 178 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 226.1s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 114.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1864 SDtfs, 7786 SDslu, 949 SDs, 0 SdLazy, 10877 SolverSat, 3619 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 109.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 417 GetRequests, 379 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 55.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8721occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 52.2s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 5 MinimizatonAttempts, 146 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 57.1s InterpolantComputationTime, 569 NumberOfCodeBlocks, 569 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 749 ConstructedInterpolants, 87 QuantifiedInterpolants, 586201 SizeOfPredicates, 5 NumberOfNonLiveVariables, 495 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 34/48 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown