/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/array-examples/standard_vararg_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:17:14,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:17:14,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:17:14,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:17:14,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:17:14,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:17:14,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:17:14,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:17:14,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:17:14,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:17:14,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:17:14,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:17:14,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:17:14,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:17:14,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:17:14,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:17:14,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:17:14,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:17:14,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:17:15,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:17:15,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:17:15,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:17:15,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:17:15,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:17:15,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:17:15,033 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 [2019-11-23 23:17:15,053 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:17:15,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:17:15,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:17:15,055 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:17:15,055 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:17:15,055 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:17:15,055 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:17:15,055 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:17:15,056 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:17:15,056 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:17:15,057 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:17:15,057 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:17:15,057 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:17:15,058 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:17:15,058 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:17:15,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:17:15,059 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:17:15,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:17:15,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:17:15,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:17:15,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:17:15,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:17:15,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:17:15,061 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:17:15,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:17:15,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:17:15,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:17:15,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:17:15,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:17:15,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:17:15,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:17:15,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:17:15,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:17:15,064 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:17:15,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:17:15,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:17:15,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:17:15,065 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:17:15,318 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:17:15,335 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:17:15,339 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:17:15,341 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:17:15,341 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:17:15,342 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_vararg_ground.i [2019-11-23 23:17:15,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0502887/8a561c04ff414831934d1437d9c45fb0/FLAGde2411a60 [2019-11-23 23:17:15,858 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:17:15,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_vararg_ground.i [2019-11-23 23:17:15,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0502887/8a561c04ff414831934d1437d9c45fb0/FLAGde2411a60 [2019-11-23 23:17:16,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0502887/8a561c04ff414831934d1437d9c45fb0 [2019-11-23 23:17:16,260 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:17:16,262 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:17:16,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:16,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:17:16,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:17:16,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b68018e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16, skipping insertion in model container [2019-11-23 23:17:16,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:17:16,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:17:16,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:16,487 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:17:16,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:16,526 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:17:16,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16 WrapperNode [2019-11-23 23:17:16,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:16,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:16,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:17:16,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:17:16,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:16,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:17:16,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:17:16,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:17:16,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (1/1) ... [2019-11-23 23:17:16,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:17:16,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:17:16,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:17:16,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:17:16,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (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 [2019-11-23 23:17:16,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:17:16,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:17:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:17:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:17:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:17:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:17:17,041 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:17:17,042 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:17:17,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:17 BoogieIcfgContainer [2019-11-23 23:17:17,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:17:17,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:17:17,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:17:17,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:17:17,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:17:16" (1/3) ... [2019-11-23 23:17:17,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b15172e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:17, skipping insertion in model container [2019-11-23 23:17:17,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:16" (2/3) ... [2019-11-23 23:17:17,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b15172e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:17, skipping insertion in model container [2019-11-23 23:17:17,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:17" (3/3) ... [2019-11-23 23:17:17,051 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_vararg_ground.i [2019-11-23 23:17:17,061 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:17:17,068 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:17:17,079 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:17:17,099 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:17:17,099 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:17:17,099 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:17:17,099 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:17:17,099 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:17:17,100 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:17:17,100 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:17:17,100 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:17:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 23:17:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:17:17,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:17,123 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:17:17,123 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1731926972, now seen corresponding path program 1 times [2019-11-23 23:17:17,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:17,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49965806] [2019-11-23 23:17:17,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:17,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49965806] [2019-11-23 23:17:17,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:17:17,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:17:17,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954543750] [2019-11-23 23:17:17,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:17:17,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:17:17,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:17:17,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:17:17,300 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 23:17:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:17:17,327 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2019-11-23 23:17:17,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:17:17,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:17:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:17:17,337 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:17:17,338 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 23:17:17,341 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 [2019-11-23 23:17:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 23:17:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 23:17:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 23:17:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-23 23:17:17,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2019-11-23 23:17:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:17:17,371 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-23 23:17:17,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:17:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-23 23:17:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:17:17,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:17,372 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:17:17,373 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:17,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2055144712, now seen corresponding path program 1 times [2019-11-23 23:17:17,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:17,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077855867] [2019-11-23 23:17:17,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:17,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077855867] [2019-11-23 23:17:17,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409013080] [2019-11-23 23:17:17,437 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 [2019-11-23 23:17:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:17,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:17:17,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:17:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:17,521 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:17:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:17,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269135982] [2019-11-23 23:17:17,572 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:17:17,572 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:17:17,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:17:17,586 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:17:17,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:17:59,498 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 275 [2019-11-23 23:18:09,343 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 293 [2019-11-23 23:18:17,096 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 307 [2019-11-23 23:18:19,556 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 320 [2019-11-23 23:18:19,666 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 313 [2019-11-23 23:18:31,139 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 330 [2019-11-23 23:18:33,860 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2019-11-23 23:18:36,321 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 341 [2019-11-23 23:18:36,439 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 334 [2019-11-23 23:18:36,671 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2019-11-23 23:18:39,228 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 341 [2019-11-23 23:18:39,364 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 337 [2019-11-23 23:18:39,494 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 23:18:39,625 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 339 [2019-11-23 23:18:39,752 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2019-11-23 23:18:39,873 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 343 [2019-11-23 23:18:42,657 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 23:18:42,788 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 347 [2019-11-23 23:18:45,438 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 23:18:45,561 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 351 [2019-11-23 23:18:48,368 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 371 [2019-11-23 23:18:48,510 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 368