/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:27:31,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:27:31,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:27:31,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:27:31,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:27:31,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:27:31,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:27:31,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:27:31,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:27:31,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:27:31,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:27:31,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:27:31,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:27:31,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:27:31,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:27:31,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:27:31,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:27:31,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:27:31,950 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:27:31,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:27:31,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:27:31,951 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:27:31,951 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:27:31,952 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:27:31,952 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:27:31,952 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:27:31,952 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:27:31,952 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:27:31,953 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:27:31,953 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:27:31,953 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:27:31,953 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:27:31,953 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:27:31,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:27:31,954 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:27:31,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:27:31,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:27:31,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:27:31,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:27:31,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:27:31,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:27:31,956 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:27:31,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:27:31,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:27:31,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:27:31,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:27:31,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:27:31,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:27:31,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:27:31,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:27:31,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:27:31,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:27:31,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:27:31,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:27:31,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:27:31,959 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:27:32,217 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:27:32,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:27:32,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:27:32,243 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:27:32,243 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:27:32,244 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2019-11-24 04:27:32,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a6fadf8/a65f9175dce54077940ccbabe235d5fc/FLAG27657f4d4 [2019-11-24 04:27:32,741 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:27:32,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2019-11-24 04:27:32,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a6fadf8/a65f9175dce54077940ccbabe235d5fc/FLAG27657f4d4 [2019-11-24 04:27:33,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a6fadf8/a65f9175dce54077940ccbabe235d5fc [2019-11-24 04:27:33,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:27:33,192 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:27:33,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:27:33,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:27:33,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:27:33,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7954cf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33, skipping insertion in model container [2019-11-24 04:27:33,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:27:33,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:27:33,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:27:33,457 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:27:33,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:27:33,495 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:27:33,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33 WrapperNode [2019-11-24 04:27:33,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:27:33,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:27:33,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:27:33,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:27:33,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:27:33,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:27:33,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:27:33,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:27:33,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (1/1) ... [2019-11-24 04:27:33,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:27:33,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:27:33,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:27:33,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:27:33,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (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 [2019-11-24 04:27:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:27:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:27:33,972 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:27:33,973 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:27:33,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:27:33 BoogieIcfgContainer [2019-11-24 04:27:33,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:27:33,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:27:33,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:27:33,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:27:33,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:27:33" (1/3) ... [2019-11-24 04:27:33,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e58784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:27:33, skipping insertion in model container [2019-11-24 04:27:33,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:33" (2/3) ... [2019-11-24 04:27:33,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e58784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:27:33, skipping insertion in model container [2019-11-24 04:27:33,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:27:33" (3/3) ... [2019-11-24 04:27:33,987 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2019-11-24 04:27:33,997 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:27:34,020 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:27:34,044 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:27:34,073 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:27:34,074 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:27:34,074 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:27:34,074 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:27:34,074 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:27:34,074 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:27:34,074 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:27:34,074 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:27:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-11-24 04:27:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:27:34,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:34,099 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:27:34,099 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash 991593, now seen corresponding path program 1 times [2019-11-24 04:27:34,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:34,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787564503] [2019-11-24 04:27:34,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:34,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787564503] [2019-11-24 04:27:34,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:27:34,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:27:34,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189313232] [2019-11-24 04:27:34,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:27:34,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:27:34,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:27:34,378 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2019-11-24 04:27:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:27:34,456 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-24 04:27:34,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:27:34,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-24 04:27:34,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:27:34,470 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:27:34,470 INFO L226 Difference]: Without dead ends: 6 [2019-11-24 04:27:34,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:27:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-11-24 04:27:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-11-24 04:27:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-24 04:27:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-11-24 04:27:34,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-11-24 04:27:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:27:34,509 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-11-24 04:27:34,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:27:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-11-24 04:27:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:27:34,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:34,510 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:27:34,511 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash 30842175, now seen corresponding path program 1 times [2019-11-24 04:27:34,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:34,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316069540] [2019-11-24 04:27:34,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:34,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316069540] [2019-11-24 04:27:34,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916024579] [2019-11-24 04:27:34,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:34,673 WARN L253 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-24 04:27:34,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:27:34,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:27:34,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:27:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:34,780 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:27:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:34,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030909042] [2019-11-24 04:27:34,969 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:27:34,971 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:27:34,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:27:34,989 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:27:34,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:27:35,105 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:27:35,164 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:27:35,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:27:35,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2019-11-24 04:27:35,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700632412] [2019-11-24 04:27:35,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-24 04:27:35,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:35,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-24 04:27:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-24 04:27:35,168 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2019-11-24 04:27:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:27:35,439 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-11-24 04:27:35,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:27:35,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-11-24 04:27:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:27:35,441 INFO L225 Difference]: With dead ends: 12 [2019-11-24 04:27:35,441 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 04:27:35,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:27:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 04:27:35,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-24 04:27:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-24 04:27:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-24 04:27:35,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2019-11-24 04:27:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:27:35,449 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-24 04:27:35,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-24 04:27:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-24 04:27:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:27:35,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:35,450 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2019-11-24 04:27:35,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:35,653 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash -422151553, now seen corresponding path program 2 times [2019-11-24 04:27:35,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:35,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697363857] [2019-11-24 04:27:35,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:35,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697363857] [2019-11-24 04:27:35,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479684314] [2019-11-24 04:27:35,828 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:35,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-24 04:27:35,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:27:35,874 WARN L253 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-24 04:27:35,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:27:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:35,974 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:27:36,312 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2019-11-24 04:27:36,578 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2019-11-24 04:27:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:36,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737502258] [2019-11-24 04:27:36,582 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:27:36,582 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:27:36,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:27:36,583 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:27:36,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:27:36,653 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:27:36,717 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:27:36,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:27:36,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2019-11-24 04:27:36,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283616606] [2019-11-24 04:27:36,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-24 04:27:36,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:36,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-24 04:27:36,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-11-24 04:27:36,723 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 16 states. [2019-11-24 04:27:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:27:37,197 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2019-11-24 04:27:37,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-24 04:27:37,198 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 7 [2019-11-24 04:27:37,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:27:37,198 INFO L225 Difference]: With dead ends: 16 [2019-11-24 04:27:37,198 INFO L226 Difference]: Without dead ends: 11 [2019-11-24 04:27:37,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2019-11-24 04:27:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-24 04:27:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-24 04:27:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:27:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-24 04:27:37,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2019-11-24 04:27:37,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:27:37,203 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-24 04:27:37,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-24 04:27:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-24 04:27:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:27:37,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:37,204 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2019-11-24 04:27:37,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:37,408 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash -550600279, now seen corresponding path program 3 times [2019-11-24 04:27:37,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:37,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387853457] [2019-11-24 04:27:37,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 04:27:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 04:27:37,507 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-24 04:27:37,507 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-24 04:27:37,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 04:27:37 BoogieIcfgContainer [2019-11-24 04:27:37,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-24 04:27:37,538 INFO L168 Benchmark]: Toolchain (without parser) took 4344.49 ms. Allocated memory was 136.8 MB in the beginning and 249.0 MB in the end (delta: 112.2 MB). Free memory was 101.8 MB in the beginning and 168.7 MB in the end (delta: -66.8 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:37,540 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-11-24 04:27:37,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.19 ms. Allocated memory is still 136.8 MB. Free memory was 101.6 MB in the beginning and 91.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:37,544 INFO L168 Benchmark]: Boogie Procedure Inliner took 122.51 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 179.3 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:37,549 INFO L168 Benchmark]: Boogie Preprocessor took 20.54 ms. Allocated memory is still 200.8 MB. Free memory was 179.3 MB in the beginning and 177.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:37,549 INFO L168 Benchmark]: RCFGBuilder took 336.16 ms. Allocated memory is still 200.8 MB. Free memory was 177.9 MB in the beginning and 164.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:37,550 INFO L168 Benchmark]: TraceAbstraction took 3557.29 ms. Allocated memory was 200.8 MB in the beginning and 249.0 MB in the end (delta: 48.2 MB). Free memory was 164.6 MB in the beginning and 168.7 MB in the end (delta: -4.0 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:37,557 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.19 ms. Allocated memory is still 136.8 MB. Free memory was 101.6 MB in the beginning and 91.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 122.51 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 179.3 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.54 ms. Allocated memory is still 200.8 MB. Free memory was 179.3 MB in the beginning and 177.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.16 ms. Allocated memory is still 200.8 MB. Free memory was 177.9 MB in the beginning and 164.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3557.29 ms. Allocated memory was 200.8 MB in the beginning and 249.0 MB in the end (delta: 48.2 MB). Free memory was 164.6 MB in the beginning and 168.7 MB in the end (delta: -4.0 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i