/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/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 03:57:04,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 03:57:04,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 03:57:04,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 03:57:04,134 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 03:57:04,157 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 03:57:04,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 03:57:04,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 03:57:04,158 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 03:57:04,158 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 03:57:04,159 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 03:57:04,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 03:57:04,159 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 03:57:04,159 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 03:57:04,159 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 03:57:04,160 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 03:57:04,161 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 03:57:04,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 03:57:04,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 03:57:04,161 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 03:57:04,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 03:57:04,162 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 03:57:04,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 03:57:04,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 03:57:04,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 03:57:04,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 03:57:04,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 03:57:04,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 03:57:04,164 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 03:57:04,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 03:57:04,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 03:57:04,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 03:57:04,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 03:57:04,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 03:57:04,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 03:57:04,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 03:57:04,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 03:57:04,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 03:57:04,167 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 03:57:04,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 03:57:04,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 03:57:04,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 03:57:04,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 03:57:04,506 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 03:57:04,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 03:57:04,525 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 03:57:04,527 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 03:57:04,527 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 03:57:04,528 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-11-24 03:57:04,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b5e3e415/25458a1b3f424abb9cf93bac601d9579/FLAGd281e024f [2019-11-24 03:57:05,032 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 03:57:05,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-11-24 03:57:05,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b5e3e415/25458a1b3f424abb9cf93bac601d9579/FLAGd281e024f [2019-11-24 03:57:05,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b5e3e415/25458a1b3f424abb9cf93bac601d9579 [2019-11-24 03:57:05,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 03:57:05,433 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 03:57:05,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 03:57:05,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 03:57:05,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 03:57:05,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fee16f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05, skipping insertion in model container [2019-11-24 03:57:05,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 03:57:05,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 03:57:05,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:57:05,674 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 03:57:05,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:57:05,706 INFO L208 MainTranslator]: Completed translation [2019-11-24 03:57:05,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05 WrapperNode [2019-11-24 03:57:05,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 03:57:05,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 03:57:05,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 03:57:05,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 03:57:05,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 03:57:05,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 03:57:05,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 03:57:05,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 03:57:05,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (1/1) ... [2019-11-24 03:57:05,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 03:57:05,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 03:57:05,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 03:57:05,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 03:57:05,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (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 03:57:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 03:57:05,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 03:57:06,091 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 03:57:06,091 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 03:57:06,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:57:06 BoogieIcfgContainer [2019-11-24 03:57:06,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 03:57:06,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 03:57:06,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 03:57:06,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 03:57:06,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 03:57:05" (1/3) ... [2019-11-24 03:57:06,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f7bd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:57:06, skipping insertion in model container [2019-11-24 03:57:06,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:57:05" (2/3) ... [2019-11-24 03:57:06,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f7bd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:57:06, skipping insertion in model container [2019-11-24 03:57:06,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:57:06" (3/3) ... [2019-11-24 03:57:06,101 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-11-24 03:57:06,111 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 03:57:06,118 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 03:57:06,130 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 03:57:06,157 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 03:57:06,157 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 03:57:06,157 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 03:57:06,157 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 03:57:06,157 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 03:57:06,158 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 03:57:06,158 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 03:57:06,158 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 03:57:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-11-24 03:57:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 03:57:06,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:57:06,184 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 03:57:06,185 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:57:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:57:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash 963404, now seen corresponding path program 1 times [2019-11-24 03:57:06,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:57:06,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922336484] [2019-11-24 03:57:06,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:57:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:57:06,403 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 03:57:06,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922336484] [2019-11-24 03:57:06,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:57:06,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:57:06,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307272583] [2019-11-24 03:57:06,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 03:57:06,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:57:06,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 03:57:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 03:57:06,424 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2019-11-24 03:57:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:57:06,481 INFO L93 Difference]: Finished difference Result 13 states and 17 transitions. [2019-11-24 03:57:06,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 03:57:06,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-24 03:57:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:57:06,492 INFO L225 Difference]: With dead ends: 13 [2019-11-24 03:57:06,492 INFO L226 Difference]: Without dead ends: 7 [2019-11-24 03:57:06,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 03:57:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-24 03:57:06,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-24 03:57:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 03:57:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-24 03:57:06,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-11-24 03:57:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:57:06,526 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-24 03:57:06,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 03:57:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-24 03:57:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 03:57:06,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:57:06,526 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-11-24 03:57:06,527 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:57:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:57:06,527 INFO L82 PathProgramCache]: Analyzing trace with hash 925765417, now seen corresponding path program 1 times [2019-11-24 03:57:06,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:57:06,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507725728] [2019-11-24 03:57:06,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:57:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:57:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:57:06,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507725728] [2019-11-24 03:57:06,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752245831] [2019-11-24 03:57:06,582 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 03:57:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:57:06,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-24 03:57:06,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:57:06,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:57:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:57:06,670 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:57:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:57:06,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654558066] [2019-11-24 03:57:06,709 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 03:57:06,709 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:57:06,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:57:06,723 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:57:06,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:57:06,921 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 03:57:07,223 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 03:57:07,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 03:57:07,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2019-11-24 03:57:07,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192199319] [2019-11-24 03:57:07,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 03:57:07,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:57:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 03:57:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-24 03:57:07,229 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-11-24 03:57:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:57:07,280 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-24 03:57:07,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 03:57:07,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-24 03:57:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:57:07,282 INFO L225 Difference]: With dead ends: 12 [2019-11-24 03:57:07,282 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 03:57:07,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-24 03:57:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 03:57:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-24 03:57:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 03:57:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-24 03:57:07,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-24 03:57:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:57:07,290 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-24 03:57:07,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 03:57:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-24 03:57:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 03:57:07,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:57:07,292 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2019-11-24 03:57:07,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:57:07,497 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:57:07,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:57:07,498 INFO L82 PathProgramCache]: Analyzing trace with hash 602269638, now seen corresponding path program 2 times [2019-11-24 03:57:07,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:57:07,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090785921] [2019-11-24 03:57:07,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:57:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 03:57:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 03:57:07,554 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-24 03:57:07,558 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-24 03:57:07,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 03:57:07 BoogieIcfgContainer [2019-11-24 03:57:07,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-24 03:57:07,579 INFO L168 Benchmark]: Toolchain (without parser) took 2144.12 ms. Allocated memory was 141.6 MB in the beginning and 200.3 MB in the end (delta: 58.7 MB). Free memory was 103.2 MB in the beginning and 90.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 71.9 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:07,579 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory is still 121.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-24 03:57:07,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.63 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:07,582 INFO L168 Benchmark]: Boogie Procedure Inliner took 118.68 ms. Allocated memory was 141.6 MB in the beginning and 200.3 MB in the end (delta: 58.7 MB). Free memory was 93.9 MB in the beginning and 180.1 MB in the end (delta: -86.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:07,582 INFO L168 Benchmark]: Boogie Preprocessor took 25.98 ms. Allocated memory is still 200.3 MB. Free memory was 180.1 MB in the beginning and 178.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:07,583 INFO L168 Benchmark]: RCFGBuilder took 239.72 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 167.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:07,584 INFO L168 Benchmark]: TraceAbstraction took 1481.82 ms. Allocated memory is still 200.3 MB. Free memory was 166.5 MB in the beginning and 90.1 MB in the end (delta: 76.4 MB). Peak memory consumption was 76.4 MB. Max. memory is 7.1 GB. [2019-11-24 03:57:07,589 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory is still 121.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.63 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 118.68 ms. Allocated memory was 141.6 MB in the beginning and 200.3 MB in the end (delta: 58.7 MB). Free memory was 93.9 MB in the beginning and 180.1 MB in the end (delta: -86.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.98 ms. Allocated memory is still 200.3 MB. Free memory was 180.1 MB in the beginning and 178.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 239.72 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 167.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1481.82 ms. Allocated memory is still 200.3 MB. Free memory was 166.5 MB in the beginning and 90.1 MB in the end (delta: 76.4 MB). Peak memory consumption was 76.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; [L24] COND TRUE i<5 [L25] i++ [L18] (b) ? (0) : __blast_assert () [L24] COND TRUE i<5 [L25] i++ [L18] (b) ? (0) : __blast_assert () [L24] COND TRUE i<5 [L25] i++ [L18] (b) ? (0) : __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 4 SDslu, 12 SDs, 0 SdLazy, 21 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 229 SizeOfPredicates, 3 NumberOfNonLiveVariables, 22 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 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...