/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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:25:17,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:25:17,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:25:17,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:25:17,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:25:17,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:25:17,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:25:17,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:25:17,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:25:17,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:25:17,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:25:17,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:25:17,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:25:17,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:25:17,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:25:17,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:25:17,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:25:17,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:25:17,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:25:17,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:25:17,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:25:17,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:25:17,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:25:17,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:25:17,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:25:17,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:25:17,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:25:17,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:25:17,245 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 04:25:17,259 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:25:17,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:25:17,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:25:17,260 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:25:17,260 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:25:17,260 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:25:17,261 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:25:17,261 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:25:17,261 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:25:17,261 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:25:17,261 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:25:17,261 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:25:17,262 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:25:17,262 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:25:17,262 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:25:17,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:25:17,263 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:25:17,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:25:17,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:25:17,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:25:17,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:25:17,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:25:17,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:25:17,264 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:25:17,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:25:17,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:25:17,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:25:17,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:25:17,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:25:17,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:25:17,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:25:17,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:25:17,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:25:17,266 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:25:17,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:25:17,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:25:17,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:25:17,267 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:25:17,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:25:17,558 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:25:17,562 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:25:17,563 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:25:17,564 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:25:17,564 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-11-24 04:25:17,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d123f9efa/3d192e204a6240989418e7ba76636d2e/FLAGace1c00b0 [2019-11-24 04:25:18,043 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:25:18,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-11-24 04:25:18,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d123f9efa/3d192e204a6240989418e7ba76636d2e/FLAGace1c00b0 [2019-11-24 04:25:18,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d123f9efa/3d192e204a6240989418e7ba76636d2e [2019-11-24 04:25:18,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:25:18,491 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:25:18,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:25:18,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:25:18,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:25:18,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1feff869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18, skipping insertion in model container [2019-11-24 04:25:18,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:25:18,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:25:18,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:25:18,691 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:25:18,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:25:18,721 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:25:18,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18 WrapperNode [2019-11-24 04:25:18,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:25:18,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:25:18,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:25:18,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:25:18,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:25:18,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:25:18,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:25:18,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:25:18,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (1/1) ... [2019-11-24 04:25:18,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:25:18,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:25:18,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:25:18,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:25:18,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (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 04:25:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:25:18,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:25:19,207 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:25:19,207 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-24 04:25:19,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:25:19 BoogieIcfgContainer [2019-11-24 04:25:19,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:25:19,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:25:19,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:25:19,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:25:19,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:25:18" (1/3) ... [2019-11-24 04:25:19,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28eb822b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:25:19, skipping insertion in model container [2019-11-24 04:25:19,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:25:18" (2/3) ... [2019-11-24 04:25:19,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28eb822b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:25:19, skipping insertion in model container [2019-11-24 04:25:19,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:25:19" (3/3) ... [2019-11-24 04:25:19,218 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-11-24 04:25:19,238 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:25:19,246 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-24 04:25:19,257 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-24 04:25:19,281 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:25:19,281 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:25:19,281 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:25:19,282 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:25:19,282 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:25:19,282 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:25:19,282 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:25:19,282 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:25:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-24 04:25:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:25:19,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:25:19,299 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:25:19,300 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:25:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:25:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash 29745418, now seen corresponding path program 1 times [2019-11-24 04:25:19,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:25:19,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525776969] [2019-11-24 04:25:19,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:25:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:25:19,481 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 04:25:19,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525776969] [2019-11-24 04:25:19,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:25:19,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:25:19,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001382674] [2019-11-24 04:25:19,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:25:19,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:25:19,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:25:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:25:19,506 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2019-11-24 04:25:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:25:19,604 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-24 04:25:19,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:25:19,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-24 04:25:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:25:19,616 INFO L225 Difference]: With dead ends: 41 [2019-11-24 04:25:19,616 INFO L226 Difference]: Without dead ends: 20 [2019-11-24 04:25:19,620 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 04:25:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-24 04:25:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2019-11-24 04:25:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-24 04:25:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-24 04:25:19,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 5 [2019-11-24 04:25:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:25:19,653 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-24 04:25:19,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:25:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-24 04:25:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:25:19,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:25:19,655 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:25:19,655 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:25:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:25:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash 29792570, now seen corresponding path program 1 times [2019-11-24 04:25:19,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:25:19,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051848092] [2019-11-24 04:25:19,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:25:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:25:19,686 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 04:25:19,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051848092] [2019-11-24 04:25:19,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:25:19,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:25:19,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172578443] [2019-11-24 04:25:19,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:25:19,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:25:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:25:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:25:19,691 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 3 states. [2019-11-24 04:25:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:25:19,710 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-24 04:25:19,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:25:19,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-24 04:25:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:25:19,712 INFO L225 Difference]: With dead ends: 20 [2019-11-24 04:25:19,712 INFO L226 Difference]: Without dead ends: 17 [2019-11-24 04:25:19,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 04:25:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-24 04:25:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-24 04:25:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-24 04:25:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-24 04:25:19,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 5 [2019-11-24 04:25:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:25:19,719 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-24 04:25:19,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:25:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-24 04:25:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:25:19,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:25:19,720 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:25:19,720 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:25:19,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:25:19,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1387310901, now seen corresponding path program 1 times [2019-11-24 04:25:19,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:25:19,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569787650] [2019-11-24 04:25:19,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:25:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:25:19,876 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 04:25:19,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569787650] [2019-11-24 04:25:19,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:25:19,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:25:19,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359920049] [2019-11-24 04:25:19,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:25:19,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:25:19,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:25:19,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:25:19,879 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2019-11-24 04:25:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:25:19,974 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-24 04:25:19,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:25:19,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-24 04:25:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:25:19,976 INFO L225 Difference]: With dead ends: 18 [2019-11-24 04:25:19,976 INFO L226 Difference]: Without dead ends: 14 [2019-11-24 04:25:19,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-24 04:25:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-24 04:25:19,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2019-11-24 04:25:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-24 04:25:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-24 04:25:19,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2019-11-24 04:25:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:25:19,983 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-24 04:25:19,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:25:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-24 04:25:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:25:19,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:25:19,984 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:25:19,985 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:25:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:25:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1086350423, now seen corresponding path program 1 times [2019-11-24 04:25:19,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:25:19,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481774338] [2019-11-24 04:25:19,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:25:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 04:25:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-24 04:25:20,065 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-24 04:25:20,065 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-24 04:25:20,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 04:25:20 BoogieIcfgContainer [2019-11-24 04:25:20,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-24 04:25:20,088 INFO L168 Benchmark]: Toolchain (without parser) took 1595.92 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 101.9 MB in the beginning and 109.2 MB in the end (delta: -7.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. [2019-11-24 04:25:20,089 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-24 04:25:20,090 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.21 ms. Allocated memory is still 144.2 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-11-24 04:25:20,091 INFO L168 Benchmark]: Boogie Procedure Inliner took 112.87 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 92.1 MB in the beginning and 179.9 MB in the end (delta: -87.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-11-24 04:25:20,092 INFO L168 Benchmark]: Boogie Preprocessor took 30.82 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 178.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-11-24 04:25:20,092 INFO L168 Benchmark]: RCFGBuilder took 340.59 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 165.4 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2019-11-24 04:25:20,093 INFO L168 Benchmark]: TraceAbstraction took 874.92 ms. Allocated memory is still 200.8 MB. Free memory was 164.8 MB in the beginning and 109.2 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2019-11-24 04:25:20,097 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.21 ms. Allocated memory is still 144.2 MB. Free memory was 101.4 MB in the beginning and 92.1 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 112.87 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 92.1 MB in the beginning and 179.9 MB in the end (delta: -87.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.82 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 178.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 340.59 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 165.4 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 874.92 ms. Allocated memory is still 200.8 MB. Free memory was 164.8 MB in the beginning and 109.2 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 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: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 [L17] COND TRUE i