/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/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:15:25,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:15:25,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:15:25,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:15:25,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:15:25,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:15:25,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:15:25,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:15:25,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:15:25,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:15:25,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:15:25,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:15:25,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:15:25,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:15:25,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:15:25,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:15:25,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:15:25,385 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 04:15:25,419 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:15:25,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:15:25,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:15:25,422 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:15:25,422 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:15:25,423 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:15:25,423 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:15:25,423 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:15:25,423 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:15:25,423 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:15:25,424 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:15:25,424 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:15:25,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:15:25,424 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:15:25,424 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:15:25,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:15:25,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:15:25,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:15:25,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:15:25,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:15:25,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:15:25,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:15:25,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:15:25,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:15:25,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:15:25,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:15:25,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:15:25,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:15:25,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:15:25,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:15:25,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:15:25,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:15:25,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:15:25,431 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:15:25,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:15:25,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:15:25,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:15:25,433 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:15:25,714 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:15:25,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:15:25,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:15:25,731 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:15:25,731 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:15:25,732 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-11-24 04:15:25,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6f08ddf/3200532658fd480a93e1e4defa357356/FLAG0c6374ad3 [2019-11-24 04:15:26,193 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:15:26,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-11-24 04:15:26,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6f08ddf/3200532658fd480a93e1e4defa357356/FLAG0c6374ad3 [2019-11-24 04:15:26,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6f08ddf/3200532658fd480a93e1e4defa357356 [2019-11-24 04:15:26,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:15:26,588 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:15:26,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:15:26,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:15:26,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:15:26,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:26,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4678a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26, skipping insertion in model container [2019-11-24 04:15:26,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:26,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:15:26,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:15:26,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:15:26,841 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:15:26,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:15:26,877 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:15:26,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26 WrapperNode [2019-11-24 04:15:26,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:15:26,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:15:26,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:15:26,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:15:26,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:26,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:26,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:15:26,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:15:26,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:15:26,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:15:27,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:27,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:27,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:27,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:27,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:27,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:27,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (1/1) ... [2019-11-24 04:15:27,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:15:27,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:15:27,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:15:27,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:15:27,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (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 04:15:27,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:15:27,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:15:27,278 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:15:27,278 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:15:27,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:15:27 BoogieIcfgContainer [2019-11-24 04:15:27,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:15:27,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:15:27,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:15:27,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:15:27,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:15:26" (1/3) ... [2019-11-24 04:15:27,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:15:27, skipping insertion in model container [2019-11-24 04:15:27,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:26" (2/3) ... [2019-11-24 04:15:27,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:15:27, skipping insertion in model container [2019-11-24 04:15:27,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:15:27" (3/3) ... [2019-11-24 04:15:27,288 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2019-11-24 04:15:27,297 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:15:27,304 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:15:27,316 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:15:27,342 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:15:27,343 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:15:27,343 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:15:27,343 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:15:27,343 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:15:27,343 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:15:27,344 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:15:27,344 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:15:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-11-24 04:15:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:15:27,368 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:27,370 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:15:27,370 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash 982688, now seen corresponding path program 1 times [2019-11-24 04:15:27,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:27,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048476210] [2019-11-24 04:15:27,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:27,626 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 04:15:27,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048476210] [2019-11-24 04:15:27,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:27,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:15:27,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702667923] [2019-11-24 04:15:27,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:15:27,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:15:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:27,646 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-11-24 04:15:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:27,673 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-11-24 04:15:27,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:15:27,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-24 04:15:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:27,683 INFO L225 Difference]: With dead ends: 13 [2019-11-24 04:15:27,684 INFO L226 Difference]: Without dead ends: 6 [2019-11-24 04:15:27,687 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-11-24 04:15:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-11-24 04:15:27,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-24 04:15:27,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-11-24 04:15:27,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-11-24 04:15:27,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:27,714 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-11-24 04:15:27,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:15:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-11-24 04:15:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:15:27,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:27,715 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:15:27,715 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:27,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:27,716 INFO L82 PathProgramCache]: Analyzing trace with hash 29879958, now seen corresponding path program 1 times [2019-11-24 04:15:27,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:27,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384532874] [2019-11-24 04:15:27,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:27,817 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 04:15:27,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384532874] [2019-11-24 04:15:27,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259837634] [2019-11-24 04:15:27,818 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 04:15:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:27,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:15:27,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:15:27,898 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 04:15:27,898 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:15:27,929 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 04:15:27,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [279822815] [2019-11-24 04:15:27,952 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:15:27,953 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:15:27,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:15:27,968 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:15:27,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:15:28,652 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:15:29,440 WARN L192 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 32 [2019-11-24 04:15:30,376 WARN L192 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 65 [2019-11-24 04:15:30,490 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:15:30,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:15:30,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-11-24 04:15:30,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386116067] [2019-11-24 04:15:30,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 04:15:30,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:30,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 04:15:30,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:15:30,496 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 7 states. [2019-11-24 04:15:30,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:30,562 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2019-11-24 04:15:30,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:15:30,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2019-11-24 04:15:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:30,563 INFO L225 Difference]: With dead ends: 12 [2019-11-24 04:15:30,564 INFO L226 Difference]: Without dead ends: 9 [2019-11-24 04:15:30,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-24 04:15:30,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-24 04:15:30,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-24 04:15:30,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:15:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-24 04:15:30,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2019-11-24 04:15:30,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:30,570 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-24 04:15:30,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-24 04:15:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-24 04:15:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:15:30,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:30,571 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2019-11-24 04:15:30,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:15:30,781 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash 516312096, now seen corresponding path program 2 times [2019-11-24 04:15:30,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:30,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982415875] [2019-11-24 04:15:30,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:30,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982415875] [2019-11-24 04:15:30,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480606011] [2019-11-24 04:15:30,917 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 04:15:30,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-24 04:15:30,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:15:30,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-24 04:15:30,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:15:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:30,986 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:15:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:31,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261305996] [2019-11-24 04:15:31,071 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:15:31,071 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:15:31,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:15:31,072 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:15:31,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:15:31,418 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:15:32,517 WARN L192 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 32 [2019-11-24 04:15:33,428 WARN L192 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 65 [2019-11-24 04:15:33,571 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:15:33,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:15:33,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2019-11-24 04:15:33,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314581864] [2019-11-24 04:15:33,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-24 04:15:33,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-24 04:15:33,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:15:33,574 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 13 states. [2019-11-24 04:15:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:33,624 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2019-11-24 04:15:33,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:15:33,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2019-11-24 04:15:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:33,633 INFO L225 Difference]: With dead ends: 14 [2019-11-24 04:15:33,634 INFO L226 Difference]: Without dead ends: 11 [2019-11-24 04:15:33,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:15:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-24 04:15:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-24 04:15:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:15:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-24 04:15:33,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-11-24 04:15:33,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:33,638 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-24 04:15:33,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-24 04:15:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-24 04:15:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:15:33,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:33,639 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2019-11-24 04:15:33,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:15:33,851 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2058949920, now seen corresponding path program 3 times [2019-11-24 04:15:33,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:33,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339647433] [2019-11-24 04:15:33,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 04:15:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 04:15:33,897 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-24 04:15:33,897 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-24 04:15:33,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 04:15:33 BoogieIcfgContainer [2019-11-24 04:15:33,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-24 04:15:33,918 INFO L168 Benchmark]: Toolchain (without parser) took 7330.05 ms. Allocated memory was 138.4 MB in the beginning and 270.5 MB in the end (delta: 132.1 MB). Free memory was 104.1 MB in the beginning and 239.1 MB in the end (delta: -135.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-11-24 04:15:33,919 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-24 04:15:33,920 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.42 ms. Allocated memory is still 138.4 MB. Free memory was 103.7 MB in the beginning and 94.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-11-24 04:15:33,921 INFO L168 Benchmark]: Boogie Procedure Inliner took 111.16 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 94.1 MB in the beginning and 181.6 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2019-11-24 04:15:33,922 INFO L168 Benchmark]: Boogie Preprocessor took 21.98 ms. Allocated memory is still 202.4 MB. Free memory was 181.6 MB in the beginning and 180.9 MB in the end (delta: 704.0 kB). Peak memory consumption was 704.0 kB. Max. memory is 7.1 GB. [2019-11-24 04:15:33,922 INFO L168 Benchmark]: RCFGBuilder took 266.85 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 169.5 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-11-24 04:15:33,923 INFO L168 Benchmark]: TraceAbstraction took 6635.72 ms. Allocated memory was 202.4 MB in the beginning and 270.5 MB in the end (delta: 68.2 MB). Free memory was 168.8 MB in the beginning and 239.1 MB in the end (delta: -70.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-11-24 04:15:33,928 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 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.42 ms. Allocated memory is still 138.4 MB. Free memory was 103.7 MB in the beginning and 94.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 111.16 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 94.1 MB in the beginning and 181.6 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.98 ms. Allocated memory is still 202.4 MB. Free memory was 181.6 MB in the beginning and 180.9 MB in the end (delta: 704.0 kB). Peak memory consumption was 704.0 kB. Max. memory is 7.1 GB. * RCFGBuilder took 266.85 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 169.5 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6635.72 ms. Allocated memory was 202.4 MB in the beginning and 270.5 MB in the end (delta: 68.2 MB). Free memory was 168.8 MB in the beginning and 239.1 MB in the end (delta: -70.2 MB). There was no memory consumed. 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: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.5s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 20 SDs, 0 SdLazy, 50 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1018 SizeOfPredicates, 2 NumberOfNonLiveVariables, 53 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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...