/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_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:27:40,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:27:40,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:27:40,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:27:40,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:27:40,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:27:40,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:27:40,276 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 04:27:40,298 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:27:40,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:27:40,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:27:40,299 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:27:40,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:27:40,300 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:27:40,300 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:27:40,300 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:27:40,300 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:27:40,301 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:27:40,302 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:27:40,302 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:27:40,302 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:27:40,303 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:27:40,303 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:27:40,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:27:40,304 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:27:40,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:27:40,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:27:40,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:27:40,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:27:40,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:27:40,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:27:40,306 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:27:40,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:27:40,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:27:40,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:27:40,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:27:40,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:27:40,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:27:40,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:27:40,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:27:40,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:27:40,309 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:27:40,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:27:40,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:27:40,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:27:40,310 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:27:40,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:27:40,592 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:27:40,596 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:27:40,597 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:27:40,597 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:27:40,598 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-11-24 04:27:40,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f39d479/cf5d979c51b64ee99cbfd9c8beeff890/FLAG277a41321 [2019-11-24 04:27:41,083 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:27:41,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-11-24 04:27:41,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f39d479/cf5d979c51b64ee99cbfd9c8beeff890/FLAG277a41321 [2019-11-24 04:27:41,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f39d479/cf5d979c51b64ee99cbfd9c8beeff890 [2019-11-24 04:27:41,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:27:41,520 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:27:41,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:27:41,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:27:41,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:27:41,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77303be3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41, skipping insertion in model container [2019-11-24 04:27:41,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:27:41,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:27:41,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:27:41,722 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:27:41,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:27:41,747 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:27:41,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41 WrapperNode [2019-11-24 04:27:41,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:27:41,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:27:41,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:27:41,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:27:41,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:27:41,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:27:41,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:27:41,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:27:41,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... [2019-11-24 04:27:41,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:27:41,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:27:41,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:27:41,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:27:41,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:27:41,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:27:41,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:27:42,144 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:27:42,144 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:27:42,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:27:42 BoogieIcfgContainer [2019-11-24 04:27:42,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:27:42,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:27:42,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:27:42,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:27:42,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:27:41" (1/3) ... [2019-11-24 04:27:42,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fc2698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:27:42, skipping insertion in model container [2019-11-24 04:27:42,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:41" (2/3) ... [2019-11-24 04:27:42,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fc2698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:27:42, skipping insertion in model container [2019-11-24 04:27:42,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:27:42" (3/3) ... [2019-11-24 04:27:42,153 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2019-11-24 04:27:42,163 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:27:42,172 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:27:42,186 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:27:42,224 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:27:42,224 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:27:42,224 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:27:42,224 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:27:42,225 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:27:42,225 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:27:42,225 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:27:42,225 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:27:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-11-24 04:27:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:27:42,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:42,246 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:27:42,247 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash 991529, now seen corresponding path program 1 times [2019-11-24 04:27:42,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:42,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399529422] [2019-11-24 04:27:42,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:42,428 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 04:27:42,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399529422] [2019-11-24 04:27:42,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:27:42,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:27:42,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601347660] [2019-11-24 04:27:42,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:27:42,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:42,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:27:42,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:27:42,449 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2019-11-24 04:27:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:27:42,517 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-24 04:27:42,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:27:42,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-24 04:27:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:27:42,530 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:27:42,531 INFO L226 Difference]: Without dead ends: 6 [2019-11-24 04:27:42,534 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 04:27:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-11-24 04:27:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-11-24 04:27:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-24 04:27:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-11-24 04:27:42,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-11-24 04:27:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:27:42,563 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-11-24 04:27:42,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:27:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-11-24 04:27:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:27:42,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:42,564 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:27:42,564 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash 30693156, now seen corresponding path program 1 times [2019-11-24 04:27:42,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:42,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952950750] [2019-11-24 04:27:42,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:42,700 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 04:27:42,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952950750] [2019-11-24 04:27:42,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562851826] [2019-11-24 04:27:42,701 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 04:27:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:42,737 WARN L253 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-24 04:27:42,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:27:42,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:27:42,815 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 04:27:42,816 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:27:42,957 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 04:27:42,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [36734366] [2019-11-24 04:27:43,009 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:27:43,010 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:27:43,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:27:43,034 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:27:43,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:27:43,178 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:27:43,237 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:27:43,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:27:43,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2019-11-24 04:27:43,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626492039] [2019-11-24 04:27:43,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-24 04:27:43,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-24 04:27:43,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-24 04:27:43,241 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2019-11-24 04:27:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:27:43,512 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2019-11-24 04:27:43,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 04:27:43,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-11-24 04:27:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:27:43,513 INFO L225 Difference]: With dead ends: 14 [2019-11-24 04:27:43,513 INFO L226 Difference]: Without dead ends: 9 [2019-11-24 04:27:43,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-11-24 04:27:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-24 04:27:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-24 04:27:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:27:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-24 04:27:43,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2019-11-24 04:27:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:27:43,519 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-24 04:27:43,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-24 04:27:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-24 04:27:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:27:43,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:43,520 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2019-11-24 04:27:43,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:43,723 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash -492156951, now seen corresponding path program 2 times [2019-11-24 04:27:43,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:43,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694700904] [2019-11-24 04:27:43,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 04:27:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 04:27:43,823 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-24 04:27:43,823 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-24 04:27:43,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 04:27:43 BoogieIcfgContainer [2019-11-24 04:27:43,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-24 04:27:43,850 INFO L168 Benchmark]: Toolchain (without parser) took 2327.86 ms. Allocated memory was 138.4 MB in the beginning and 235.9 MB in the end (delta: 97.5 MB). Free memory was 103.0 MB in the beginning and 185.1 MB in the end (delta: -82.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:43,851 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory is still 121.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-24 04:27:43,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.79 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 93.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:43,855 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.65 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 93.5 MB in the beginning and 181.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:43,856 INFO L168 Benchmark]: Boogie Preprocessor took 22.16 ms. Allocated memory is still 202.9 MB. Free memory was 181.8 MB in the beginning and 180.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:43,857 INFO L168 Benchmark]: RCFGBuilder took 264.16 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 166.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:43,864 INFO L168 Benchmark]: TraceAbstraction took 1699.08 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 166.9 MB in the beginning and 185.1 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2019-11-24 04:27:43,875 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory is still 121.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.79 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 93.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 110.65 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 93.5 MB in the beginning and 181.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.16 ms. Allocated memory is still 202.9 MB. Free memory was 181.8 MB in the beginning and 180.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 264.16 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 166.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1699.08 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 166.9 MB in the beginning and 185.1 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.9 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, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 7 SDtfs, 12 SDslu, 16 SDs, 0 SdLazy, 31 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 508 SizeOfPredicates, 6 NumberOfNonLiveVariables, 20 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...