java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:03:51,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:03:51,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:03:51,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:03:51,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:03:51,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:03:51,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:03:51,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:03:51,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:03:51,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:03:51,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:03:51,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:03:51,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:03:51,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:03:51,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:03:51,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:03:51,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:03:51,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:03:51,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:03:51,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:03:51,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:03:51,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:03:51,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:03:51,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:03:51,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:03:51,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:03:51,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:03:51,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:03:51,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:03:51,981 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:03:51,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:03:51,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:03:51,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:03:51,983 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:03:51,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:03:51,984 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:03:51,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:03:51,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:03:51,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:03:51,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:03:51,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:03:51,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:03:51,986 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:03:51,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:03:51,986 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:03:51,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:03:51,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:03:51,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:03:51,987 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:03:51,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:03:51,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:51,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:03:51,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:03:51,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:03:51,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:03:51,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:03:51,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:03:51,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:03:52,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:03:52,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:03:52,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:03:52,295 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:03:52,295 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:03:52,296 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2019-10-15 03:03:52,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e112268ab/f6921bd3ae504c25af858b744c9124e7/FLAG3f4e00a7e [2019-10-15 03:03:52,866 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:03:52,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2019-10-15 03:03:52,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e112268ab/f6921bd3ae504c25af858b744c9124e7/FLAG3f4e00a7e [2019-10-15 03:03:53,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e112268ab/f6921bd3ae504c25af858b744c9124e7 [2019-10-15 03:03:53,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:03:53,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:03:53,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:53,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:03:53,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:03:53,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:53" (1/1) ... [2019-10-15 03:03:53,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f58af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53, skipping insertion in model container [2019-10-15 03:03:53,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:53" (1/1) ... [2019-10-15 03:03:53,237 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:03:53,259 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:03:53,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:53,440 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:03:53,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:53,492 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:03:53,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53 WrapperNode [2019-10-15 03:03:53,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:53,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:03:53,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:03:53,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:03:53,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53" (1/1) ... [2019-10-15 03:03:53,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53" (1/1) ... [2019-10-15 03:03:53,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53" (1/1) ... [2019-10-15 03:03:53,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53" (1/1) ... [2019-10-15 03:03:53,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53" (1/1) ... [2019-10-15 03:03:53,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53" (1/1) ... [2019-10-15 03:03:53,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53" (1/1) ... [2019-10-15 03:03:53,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:03:53,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:03:53,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:03:53,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:03:53,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53" (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 [2019-10-15 03:03:53,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:03:53,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:03:53,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:03:53,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:03:53,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:03:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:03:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:03:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-15 03:03:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:03:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:03:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:03:53,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:03:53,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:03:53,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:03:53,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:03:54,210 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:03:54,211 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 03:03:54,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:54 BoogieIcfgContainer [2019-10-15 03:03:54,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:03:54,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:03:54,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:03:54,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:03:54,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:03:53" (1/3) ... [2019-10-15 03:03:54,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0f5c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:54, skipping insertion in model container [2019-10-15 03:03:54,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:53" (2/3) ... [2019-10-15 03:03:54,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0f5c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:54, skipping insertion in model container [2019-10-15 03:03:54,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:54" (3/3) ... [2019-10-15 03:03:54,221 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2019-10-15 03:03:54,230 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:03:54,238 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:03:54,248 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:03:54,271 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:03:54,272 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:03:54,272 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:03:54,272 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:03:54,272 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:03:54,272 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:03:54,272 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:03:54,273 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:03:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-15 03:03:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 03:03:54,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:54,296 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:54,299 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:54,306 INFO L82 PathProgramCache]: Analyzing trace with hash 176718902, now seen corresponding path program 1 times [2019-10-15 03:03:54,316 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:54,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396741536] [2019-10-15 03:03:54,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:54,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:54,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:54,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396741536] [2019-10-15 03:03:54,471 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:54,472 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:03:54,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626612135] [2019-10-15 03:03:54,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:03:54,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:54,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:03:54,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:03:54,499 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-10-15 03:03:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:54,525 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2019-10-15 03:03:54,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:03:54,527 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-10-15 03:03:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:54,536 INFO L225 Difference]: With dead ends: 45 [2019-10-15 03:03:54,537 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:03:54,542 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:03:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:03:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:03:54,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:03:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:03:54,609 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2019-10-15 03:03:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:54,610 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:03:54,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:03:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:03:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 03:03:54,613 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:54,614 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:54,615 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:54,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1184471636, now seen corresponding path program 1 times [2019-10-15 03:03:54,617 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:54,618 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353330568] [2019-10-15 03:03:54,618 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:54,619 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:54,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:54,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353330568] [2019-10-15 03:03:54,748 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:54,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:03:54,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506825489] [2019-10-15 03:03:54,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:03:54,756 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:03:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:03:54,757 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:03:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:54,805 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:03:54,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:03:54,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-15 03:03:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:54,809 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:03:54,810 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:03:54,811 INFO L600 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 [2019-10-15 03:03:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:03:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-10-15 03:03:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 03:03:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-10-15 03:03:54,828 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 20 [2019-10-15 03:03:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:54,828 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-10-15 03:03:54,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:03:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-10-15 03:03:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 03:03:54,831 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:54,831 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:54,832 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1352731196, now seen corresponding path program 1 times [2019-10-15 03:03:54,834 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:54,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730337876] [2019-10-15 03:03:54,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:54,835 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:54,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:03:54,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730337876] [2019-10-15 03:03:54,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634552588] [2019-10-15 03:03:54,931 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 [2019-10-15 03:03:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:55,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:03:55,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:03:55,058 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:03:55,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016370690] [2019-10-15 03:03:55,158 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 03:03:55,158 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:55,168 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:55,185 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:55,187 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:55,348 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:03:55,915 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 03:03:55,940 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:03:55,954 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:56,749 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:03:56,749 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [4, 4, 4] total 24 [2019-10-15 03:03:56,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994879949] [2019-10-15 03:03:56,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 03:03:56,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 03:03:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:03:56,755 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 19 states. [2019-10-15 03:03:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:57,739 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-10-15 03:03:57,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 03:03:57,740 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-10-15 03:03:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:57,742 INFO L225 Difference]: With dead ends: 44 [2019-10-15 03:03:57,742 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 03:03:57,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 03:03:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 03:03:57,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2019-10-15 03:03:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 03:03:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-15 03:03:57,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2019-10-15 03:03:57,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:57,754 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-15 03:03:57,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 03:03:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-15 03:03:57,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:03:57,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:57,755 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:57,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:57,957 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1780369353, now seen corresponding path program 1 times [2019-10-15 03:03:57,958 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:57,958 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127997832] [2019-10-15 03:03:57,959 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:57,959 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:57,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:03:58,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127997832] [2019-10-15 03:03:58,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103315444] [2019-10-15 03:03:58,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-15 03:03:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:58,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:03:58,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:03:58,127 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:03:58,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041417233] [2019-10-15 03:03:58,168 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 03:03:58,168 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:58,169 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:58,169 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:58,169 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:58,211 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:03:58,663 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2019-10-15 03:03:58,675 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:03:58,682 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:59,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:03:59,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 23 [2019-10-15 03:03:59,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380484554] [2019-10-15 03:03:59,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:03:59,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:59,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:03:59,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2019-10-15 03:03:59,588 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 18 states. [2019-10-15 03:04:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:00,510 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-15 03:04:00,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:04:00,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-10-15 03:04:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:00,516 INFO L225 Difference]: With dead ends: 43 [2019-10-15 03:04:00,516 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 03:04:00,518 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 03:04:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 03:04:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-10-15 03:04:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:04:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:04:00,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2019-10-15 03:04:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:00,524 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:04:00,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:04:00,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:04:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:04:00,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:00,525 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:00,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:00,730 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:00,731 INFO L82 PathProgramCache]: Analyzing trace with hash -207415457, now seen corresponding path program 1 times [2019-10-15 03:04:00,731 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:00,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282177478] [2019-10-15 03:04:00,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:00,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:00,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:04:00,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282177478] [2019-10-15 03:04:00,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999790343] [2019-10-15 03:04:00,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:00,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:04:00,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:04:00,897 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:04:00,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157917545] [2019-10-15 03:04:00,935 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 03:04:00,939 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:04:00,939 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:04:00,939 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:04:00,940 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:04:00,975 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:04:01,308 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 12 for LOIs [2019-10-15 03:04:01,316 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:04:01,320 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:04:01,954 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:04:01,954 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 23 [2019-10-15 03:04:01,954 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376629453] [2019-10-15 03:04:01,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:04:01,955 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:01,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:04:01,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2019-10-15 03:04:01,956 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 18 states. [2019-10-15 03:04:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:02,869 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-10-15 03:04:02,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:04:02,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-10-15 03:04:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:02,870 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:04:02,870 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 03:04:02,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 03:04:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 03:04:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-10-15 03:04:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 03:04:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-15 03:04:02,876 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 24 [2019-10-15 03:04:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:02,877 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-15 03:04:02,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:04:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-15 03:04:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 03:04:02,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:02,878 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:03,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:03,088 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:03,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1377800540, now seen corresponding path program 1 times [2019-10-15 03:04:03,088 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:03,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150194101] [2019-10-15 03:04:03,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:03,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:03,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 03:04:03,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150194101] [2019-10-15 03:04:03,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423044441] [2019-10-15 03:04:03,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:03,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:04:03,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 03:04:03,248 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 03:04:03,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144215243] [2019-10-15 03:04:03,283 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 03:04:03,284 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:04:03,284 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:04:03,285 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:04:03,285 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:04:03,311 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:04:03,600 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2019-10-15 03:04:03,623 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:04:03,628 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:04:04,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:04:04,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [4, 4, 4] total 21 [2019-10-15 03:04:04,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115966717] [2019-10-15 03:04:04,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 03:04:04,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:04,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 03:04:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2019-10-15 03:04:04,345 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 16 states. [2019-10-15 03:04:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:04,903 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-10-15 03:04:04,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:04:04,906 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-10-15 03:04:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:04,907 INFO L225 Difference]: With dead ends: 35 [2019-10-15 03:04:04,907 INFO L226 Difference]: Without dead ends: 30 [2019-10-15 03:04:04,907 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2019-10-15 03:04:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-15 03:04:04,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-10-15 03:04:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 03:04:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-15 03:04:04,913 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 26 [2019-10-15 03:04:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:04,914 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-15 03:04:04,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 03:04:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-15 03:04:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 03:04:04,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:04,915 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:05,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:05,125 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:05,126 INFO L82 PathProgramCache]: Analyzing trace with hash 301099668, now seen corresponding path program 1 times [2019-10-15 03:04:05,126 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:05,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786238409] [2019-10-15 03:04:05,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:05,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:05,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:04:05,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786238409] [2019-10-15 03:04:05,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000803964] [2019-10-15 03:04:05,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:05,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:04:05,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:04:05,318 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:04:05,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867851804] [2019-10-15 03:04:05,360 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 03:04:05,360 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:04:05,361 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:04:05,361 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:04:05,361 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:04:05,408 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:04:05,861 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2019-10-15 03:04:05,867 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:04:05,870 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:04:06,507 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:04:06,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 20 [2019-10-15 03:04:06,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431524656] [2019-10-15 03:04:06,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-15 03:04:06,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:06,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-15 03:04:06,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-10-15 03:04:06,510 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 15 states. [2019-10-15 03:04:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:07,020 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-10-15 03:04:07,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 03:04:07,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2019-10-15 03:04:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:07,022 INFO L225 Difference]: With dead ends: 28 [2019-10-15 03:04:07,022 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 03:04:07,023 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2019-10-15 03:04:07,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 03:04:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 03:04:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 03:04:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 03:04:07,024 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2019-10-15 03:04:07,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:07,024 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 03:04:07,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-15 03:04:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 03:04:07,024 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 03:04:07,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:07,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 03:04:07,656 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-10-15 03:04:07,787 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-10-15 03:04:07,935 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2019-10-15 03:04:07,938 INFO L439 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-15 03:04:07,938 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 03:04:07,938 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 03:04:07,938 INFO L439 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (and (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |#NULL.offset|)) [2019-10-15 03:04:07,938 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 03:04:07,939 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 03:04:07,939 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 14 58) no Hoare annotation was computed. [2019-10-15 03:04:07,939 INFO L439 ceAbstractionStarter]: At program point L23-3(lines 23 24) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (and (<= 0 main_~i~0) (= 0 (select |#valid| 0))) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0))) [2019-10-15 03:04:07,939 INFO L439 ceAbstractionStarter]: At program point L19-3(lines 19 20) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (and (<= 0 main_~i~0) (= 0 (select |#valid| 0))) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0))) [2019-10-15 03:04:07,939 INFO L443 ceAbstractionStarter]: For program point L32-1(lines 32 33) no Hoare annotation was computed. [2019-10-15 03:04:07,939 INFO L439 ceAbstractionStarter]: At program point L32-3(lines 32 33) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0)) (and (let ((.cse0 (<= 5 main_~i~0))) (or (and .cse0 (<= 1 main_~nc_A~0)) (and .cse0 (= (select (select |#memory_int| |main_~#string_B~0.base|) (+ |main_~#string_B~0.offset| 4)) 0) (= main_~nc_A~0 0)))) (= 0 (select |#valid| 0)) (or (= main_~nc_B~0 0) (<= 1 main_~nc_B~0)))) [2019-10-15 03:04:07,940 INFO L443 ceAbstractionStarter]: For program point L32-4(lines 15 58) no Hoare annotation was computed. [2019-10-15 03:04:07,940 INFO L443 ceAbstractionStarter]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2019-10-15 03:04:07,940 INFO L439 ceAbstractionStarter]: At program point L28-3(lines 28 29) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0)) (and (let ((.cse0 (<= 5 main_~i~0))) (or (and .cse0 (<= 1 main_~nc_A~0)) (and .cse0 (= (select (select |#memory_int| |main_~#string_B~0.base|) (+ |main_~#string_B~0.offset| 4)) 0) (= main_~nc_A~0 0)))) (= 0 (select |#valid| 0)))) [2019-10-15 03:04:07,940 INFO L443 ceAbstractionStarter]: For program point L28-4(lines 28 29) no Hoare annotation was computed. [2019-10-15 03:04:07,940 INFO L439 ceAbstractionStarter]: At program point L41-2(lines 39 51) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (= 0 (select |#valid| 0)) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0))) [2019-10-15 03:04:07,940 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-10-15 03:04:07,940 INFO L443 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-10-15 03:04:07,941 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 14 58) no Hoare annotation was computed. [2019-10-15 03:04:07,941 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 14 58) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (not (<= 0 |#NULL.base|)) (and (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|) (= |old(#length)| |#length|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0))) [2019-10-15 03:04:07,941 INFO L439 ceAbstractionStarter]: At program point L55(line 55) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0)) (and (= 0 (select |#valid| 0)) (let ((.cse0 (= (ite (< main_~nc_B~0 (+ main_~j~0 1)) 1 0) main_~found~0))) (or (and (<= main_~nc_B~0 main_~j~0) .cse0) (and .cse0 (<= main_~nc_A~0 main_~i~0)))))) [2019-10-15 03:04:07,941 INFO L443 ceAbstractionStarter]: For program point L55-1(line 55) no Hoare annotation was computed. [2019-10-15 03:04:07,941 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2019-10-15 03:04:07,941 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-10-15 03:04:07,942 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2019-10-15 03:04:07,942 INFO L443 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2019-10-15 03:04:07,942 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-10-15 03:04:07,942 INFO L443 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2019-10-15 03:04:07,950 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,951 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,951 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,951 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,957 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,957 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,958 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,958 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,960 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,960 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,960 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,960 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,961 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-10-15 03:04:07,961 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,962 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,962 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,962 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,962 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-10-15 03:04:07,963 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,963 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,963 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,964 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,964 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-10-15 03:04:07,964 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,965 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,965 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,965 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,965 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-10-15 03:04:07,966 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,966 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,966 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,967 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,967 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,967 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,968 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,968 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,968 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,968 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,969 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,969 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,969 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,970 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,970 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,970 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 03:04:07 BoogieIcfgContainer [2019-10-15 03:04:07,973 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 03:04:07,975 INFO L168 Benchmark]: Toolchain (without parser) took 14756.59 ms. Allocated memory was 140.0 MB in the beginning and 315.1 MB in the end (delta: 175.1 MB). Free memory was 104.9 MB in the beginning and 174.2 MB in the end (delta: -69.3 MB). Peak memory consumption was 105.8 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:07,975 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-15 03:04:07,976 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.97 ms. Allocated memory is still 140.0 MB. Free memory was 104.7 MB in the beginning and 94.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:07,976 INFO L168 Benchmark]: Boogie Preprocessor took 146.83 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 94.1 MB in the beginning and 182.2 MB in the end (delta: -88.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:07,977 INFO L168 Benchmark]: RCFGBuilder took 571.78 ms. Allocated memory is still 204.5 MB. Free memory was 182.2 MB in the beginning and 158.3 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:07,977 INFO L168 Benchmark]: TraceAbstraction took 13759.47 ms. Allocated memory was 204.5 MB in the beginning and 315.1 MB in the end (delta: 110.6 MB). Free memory was 157.7 MB in the beginning and 174.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 94.1 MB. Max. memory is 7.1 GB. [2019-10-15 03:04:07,980 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.97 ms. Allocated memory is still 140.0 MB. Free memory was 104.7 MB in the beginning and 94.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.83 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 94.1 MB in the beginning and 182.2 MB in the end (delta: -88.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 571.78 ms. Allocated memory is still 204.5 MB. Free memory was 182.2 MB in the beginning and 158.3 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13759.47 ms. Allocated memory was 204.5 MB in the beginning and 315.1 MB in the end (delta: 110.6 MB). Free memory was 157.7 MB in the beginning and 174.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 94.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant [2019-10-15 03:04:07,988 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,988 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,989 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,989 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,989 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,990 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,990 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,990 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((!(#NULL <= 0) || 0 == \valid[0]) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || !(#NULL <= 0) - InvariantResult [Line: 32]: Loop Invariant [2019-10-15 03:04:07,990 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,991 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,991 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,991 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,991 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-10-15 03:04:07,992 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,992 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,992 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,992 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,992 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((!(#NULL <= 0) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || !(#NULL <= 0)) || ((((5 <= i && 1 <= nc_A) || ((5 <= i && unknown-#memory_int-unknown[string_B][string_B + 4] == 0) && nc_A == 0)) && 0 == \valid[0]) && (nc_B == 0 || 1 <= nc_B)) - InvariantResult [Line: 28]: Loop Invariant [2019-10-15 03:04:07,993 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,993 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,993 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,994 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,994 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-10-15 03:04:07,994 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,994 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,995 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,995 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,995 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((!(#NULL <= 0) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || !(#NULL <= 0)) || (((5 <= i && 1 <= nc_A) || ((5 <= i && unknown-#memory_int-unknown[string_B][string_B + 4] == 0) && nc_A == 0)) && 0 == \valid[0]) - InvariantResult [Line: 23]: Loop Invariant [2019-10-15 03:04:07,996 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,996 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,996 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,996 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,996 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,997 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,997 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,997 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((!(#NULL <= 0) || (0 <= i && 0 == \valid[0])) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || !(#NULL <= 0) - InvariantResult [Line: 19]: Loop Invariant [2019-10-15 03:04:07,997 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,997 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,998 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:07,998 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:08,000 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:08,001 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:08,001 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-10-15 03:04:08,001 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((!(#NULL <= 0) || (0 <= i && 0 == \valid[0])) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || !(#NULL <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 13.6s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, HoareTripleCheckerStatistics: 96 SDtfs, 225 SDslu, 174 SDs, 0 SdLazy, 814 SolverSat, 171 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 451 GetRequests, 282 SyntacticMatches, 10 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, 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, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 20 PreInvPairs, 39 NumberOfFragments, 326 HoareAnnotationTreeSize, 20 FomulaSimplifications, 2621 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 657 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 284 NumberOfCodeBlocks, 284 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 10504 SizeOfPredicates, 5 NumberOfNonLiveVariables, 518 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 54/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 2555, ICFG_INTERPRETER_ENTERED_PROCEDURES: 20, DAG_INTERPRETER_EARLY_EXIT_QUERIES: 228, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 161, TOOLS_POST_TIME[ms]: 1014, TOOLS_POST_CALL_APPLICATIONS: 25, TOOLS_POST_CALL_TIME[ms]: 58, TOOLS_POST_RETURN_APPLICATIONS: 10, TOOLS_POST_RETURN_TIME[ms]: 9, TOOLS_QUANTIFIERELIM_APPLICATIONS: 196, TOOLS_QUANTIFIERELIM_TIME[ms]: 1015, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 139, FLUID_QUERY_TIME[ms]: 11, FLUID_QUERIES: 280, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 195, DOMAIN_JOIN_TIME[ms]: 857, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 35, DOMAIN_WIDEN_TIME[ms]: 278, DOMAIN_ISSUBSETEQ_APPLICATIONS: 52, DOMAIN_ISSUBSETEQ_TIME[ms]: 128, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME[ms]: 22, LOOP_SUMMARIZER_APPLICATIONS: 17, LOOP_SUMMARIZER_CACHE_MISSES: 17, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1564, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1563, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 52, CALL_SUMMARIZER_APPLICATIONS: 10, CALL_SUMMARIZER_CACHE_MISSES: 5, CALL_SUMMARIZER_OVERALL_TIME[ms]: 115, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 115, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 8, PATH_EXPR_TIME[ms]: 8, REGEX_TO_DAG_TIME[ms]: 8, DAG_COMPRESSION_TIME[ms]: 44, DAG_COMPRESSION_PROCESSED_NODES: 1026, DAG_COMPRESSION_RETAINED_NODES: 346, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...