/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/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/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:01:13,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:01:13,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:01:13,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:01:13,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:01:13,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:01:13,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:01:13,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:01:13,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:01:13,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:01:13,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:01:13,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:01:13,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:01:13,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:01:13,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:01:13,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:01:13,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:01:13,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:01:13,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:01:13,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:01:13,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:01:13,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:01:13,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:01:13,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:01:13,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:01:13,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:01:13,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:01:13,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:01:13,730 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 [2019-11-07 04:01:13,748 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:01:13,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:01:13,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:01:13,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:01:13,752 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:01:13,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:01:13,752 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:01:13,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:01:13,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:01:13,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:01:13,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:01:13,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:01:13,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:01:13,756 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:01:13,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:01:13,756 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:01:13,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:01:13,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:01:13,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:01:13,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:01:13,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:01:13,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:01:13,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:01:13,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:01:13,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:01:13,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:01:13,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:01:13,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:01:13,758 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 [2019-11-07 04:01:14,033 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:01:14,047 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:01:14,051 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:01:14,052 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:01:14,053 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:01:14,054 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2019-11-07 04:01:14,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e97dc61/d43f43c54a454512a3c73f5c318c3007/FLAG7ed574197 [2019-11-07 04:01:14,598 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:01:14,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2019-11-07 04:01:14,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e97dc61/d43f43c54a454512a3c73f5c318c3007/FLAG7ed574197 [2019-11-07 04:01:15,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e97dc61/d43f43c54a454512a3c73f5c318c3007 [2019-11-07 04:01:15,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:01:15,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:01:15,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:01:15,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:01:15,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:01:15,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:01:15" (1/1) ... [2019-11-07 04:01:15,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7520e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15, skipping insertion in model container [2019-11-07 04:01:15,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:01:15" (1/1) ... [2019-11-07 04:01:15,110 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:01:15,133 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:01:15,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:01:15,321 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:01:15,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:01:15,348 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:01:15,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15 WrapperNode [2019-11-07 04:01:15,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:01:15,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:01:15,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:01:15,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:01:15,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15" (1/1) ... [2019-11-07 04:01:15,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15" (1/1) ... [2019-11-07 04:01:15,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15" (1/1) ... [2019-11-07 04:01:15,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15" (1/1) ... [2019-11-07 04:01:15,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15" (1/1) ... [2019-11-07 04:01:15,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15" (1/1) ... [2019-11-07 04:01:15,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15" (1/1) ... [2019-11-07 04:01:15,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:01:15,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:01:15,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:01:15,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:01:15,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15" (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 [2019-11-07 04:01:15,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:01:15,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:01:15,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 04:01:15,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:01:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:01:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 04:01:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:01:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:01:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:01:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:01:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:01:15,747 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:01:15,748 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 04:01:15,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:01:15 BoogieIcfgContainer [2019-11-07 04:01:15,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:01:15,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:01:15,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:01:15,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:01:15,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:01:15" (1/3) ... [2019-11-07 04:01:15,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d74acd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:01:15, skipping insertion in model container [2019-11-07 04:01:15,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:15" (2/3) ... [2019-11-07 04:01:15,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d74acd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:01:15, skipping insertion in model container [2019-11-07 04:01:15,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:01:15" (3/3) ... [2019-11-07 04:01:15,762 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i [2019-11-07 04:01:15,775 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:01:15,796 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:01:15,809 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:01:15,834 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:01:15,835 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:01:15,835 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:01:15,835 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:01:15,835 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:01:15,835 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:01:15,835 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:01:15,836 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:01:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 04:01:15,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 04:01:15,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:01:15,855 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:01:15,856 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:01:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:01:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash -741608086, now seen corresponding path program 1 times [2019-11-07 04:01:15,867 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:01:15,867 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635510983] [2019-11-07 04:01:15,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:01:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:16,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635510983] [2019-11-07 04:01:16,066 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:01:16,066 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:01:16,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887572344] [2019-11-07 04:01:16,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:01:16,072 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:01:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:01:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:01:16,086 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-11-07 04:01:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:01:16,165 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-11-07 04:01:16,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:01:16,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-07 04:01:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:01:16,175 INFO L225 Difference]: With dead ends: 37 [2019-11-07 04:01:16,175 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 04:01:16,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:01:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 04:01:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 04:01:16,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 04:01:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-07 04:01:16,211 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2019-11-07 04:01:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:01:16,212 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-07 04:01:16,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:01:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-07 04:01:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 04:01:16,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:01:16,214 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:01:16,214 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:01:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:01:16,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1356428647, now seen corresponding path program 1 times [2019-11-07 04:01:16,215 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:01:16,216 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448082464] [2019-11-07 04:01:16,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:01:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:16,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448082464] [2019-11-07 04:01:16,277 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:01:16,278 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:01:16,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575235027] [2019-11-07 04:01:16,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:01:16,280 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:01:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:01:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:01:16,281 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2019-11-07 04:01:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:01:16,334 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-11-07 04:01:16,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:01:16,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-07 04:01:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:01:16,336 INFO L225 Difference]: With dead ends: 20 [2019-11-07 04:01:16,336 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 04:01:16,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:01:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 04:01:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 04:01:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 04:01:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 04:01:16,339 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-11-07 04:01:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:01:16,339 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 04:01:16,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:01:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 04:01:16,340 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 04:01:16,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 04:01:16,413 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-11-07 04:01:16,413 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:01:16,414 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:01:16,414 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 04:01:16,414 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 04:01:16,414 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 04:01:16,414 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2019-11-07 04:01:16,415 INFO L439 ceAbstractionStarter]: At program point L15(line 15) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~nlen~0)) [2019-11-07 04:01:16,415 INFO L439 ceAbstractionStarter]: At program point L15-1(line 15) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~nlen~0)) [2019-11-07 04:01:16,415 INFO L439 ceAbstractionStarter]: At program point L13-3(lines 13 18) the Hoare annotation is: (<= 0 main_~i~0) [2019-11-07 04:01:16,416 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2019-11-07 04:01:16,416 INFO L443 ceAbstractionStarter]: For program point L16(lines 14 17) no Hoare annotation was computed. [2019-11-07 04:01:16,416 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 17) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~nlen~0)) [2019-11-07 04:01:16,416 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-07 04:01:16,417 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-07 04:01:16,417 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-07 04:01:16,417 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-07 04:01:16,417 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-07 04:01:16,417 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-07 04:01:16,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:01:16 BoogieIcfgContainer [2019-11-07 04:01:16,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 04:01:16,437 INFO L168 Benchmark]: Toolchain (without parser) took 1372.62 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 104.0 MB in the beginning and 127.5 MB in the end (delta: -23.5 MB). Peak memory consumption was 39.4 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:16,438 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 04:01:16,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.37 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 94.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:16,441 INFO L168 Benchmark]: Boogie Preprocessor took 111.06 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 94.4 MB in the beginning and 180.2 MB in the end (delta: -85.8 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:16,442 INFO L168 Benchmark]: RCFGBuilder took 290.20 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 166.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:16,443 INFO L168 Benchmark]: TraceAbstraction took 681.19 ms. Allocated memory is still 201.9 MB. Free memory was 166.8 MB in the beginning and 127.5 MB in the end (delta: 39.3 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:16,447 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 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.37 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 94.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.06 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 94.4 MB in the beginning and 180.2 MB in the end (delta: -85.8 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 290.20 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 166.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 681.19 ms. Allocated memory is still 201.9 MB. Free memory was 166.8 MB in the beginning and 127.5 MB in the end (delta: 39.3 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: 0 <= i && i + 1 <= nlen - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 <= i - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 12 SDslu, 72 SDs, 0 SdLazy, 33 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 12 PreInvPairs, 16 NumberOfFragments, 35 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 675 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...