/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-acceleration/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:59:25,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:59:25,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:59:25,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:59:25,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:59:25,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:59:25,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:59:25,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:59:25,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:59:25,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:59:25,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:59:25,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:59:25,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:59:25,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:59:25,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:59:25,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:59:25,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:59:25,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:59:25,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:59:25,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:59:25,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:59:25,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:59:25,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:59:25,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:59:25,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 03:59:25,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:59:25,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:59:25,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:59:25,410 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 03:59:25,430 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:59:25,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:59:25,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:59:25,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:59:25,435 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:59:25,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:59:25,435 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:59:25,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:59:25,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:59:25,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:59:25,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:59:25,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:59:25,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:59:25,437 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:59:25,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:59:25,437 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:59:25,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:59:25,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:59:25,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:59:25,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:59:25,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:59:25,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:59:25,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:59:25,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:59:25,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:59:25,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:59:25,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:59:25,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:59:25,440 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 03:59:25,714 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:59:25,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:59:25,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:59:25,732 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:59:25,732 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:59:25,733 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2019-11-07 03:59:25,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a461dc50/1127c4de981043138b9a539e936a9423/FLAG861be817f [2019-11-07 03:59:26,237 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:59:26,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2019-11-07 03:59:26,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a461dc50/1127c4de981043138b9a539e936a9423/FLAG861be817f [2019-11-07 03:59:26,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a461dc50/1127c4de981043138b9a539e936a9423 [2019-11-07 03:59:26,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:59:26,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:59:26,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:59:26,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:59:26,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:59:26,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:59:26" (1/1) ... [2019-11-07 03:59:26,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87f41dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26, skipping insertion in model container [2019-11-07 03:59:26,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:59:26" (1/1) ... [2019-11-07 03:59:26,679 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:59:26,694 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:59:26,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:59:26,846 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:59:26,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:59:26,870 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:59:26,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26 WrapperNode [2019-11-07 03:59:26,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:59:26,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:59:26,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:59:26,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:59:26,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26" (1/1) ... [2019-11-07 03:59:26,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26" (1/1) ... [2019-11-07 03:59:26,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26" (1/1) ... [2019-11-07 03:59:26,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26" (1/1) ... [2019-11-07 03:59:26,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26" (1/1) ... [2019-11-07 03:59:26,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26" (1/1) ... [2019-11-07 03:59:26,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26" (1/1) ... [2019-11-07 03:59:26,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:59:26,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:59:26,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:59:26,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:59:26,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:59:27,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:59:27,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:59:27,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 03:59:27,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:59:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:59:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 03:59:27,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:59:27,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:59:27,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:59:27,213 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:59:27,214 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 03:59:27,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:59:27 BoogieIcfgContainer [2019-11-07 03:59:27,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:59:27,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:59:27,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:59:27,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:59:27,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:59:26" (1/3) ... [2019-11-07 03:59:27,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b200bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:59:27, skipping insertion in model container [2019-11-07 03:59:27,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:26" (2/3) ... [2019-11-07 03:59:27,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b200bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:59:27, skipping insertion in model container [2019-11-07 03:59:27,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:59:27" (3/3) ... [2019-11-07 03:59:27,223 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2019-11-07 03:59:27,232 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:59:27,238 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:59:27,250 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:59:27,273 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:59:27,273 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:59:27,274 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:59:27,274 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:59:27,274 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:59:27,274 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:59:27,274 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:59:27,274 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:59:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-07 03:59:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 03:59:27,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:27,295 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:27,297 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1869232855, now seen corresponding path program 1 times [2019-11-07 03:59:27,308 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:27,309 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132883158] [2019-11-07 03:59:27,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:27,604 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2019-11-07 03:59:27,619 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 03:59:27,619 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132883158] [2019-11-07 03:59:27,620 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:59:27,621 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:59:27,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955779010] [2019-11-07 03:59:27,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:59:27,628 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:59:27,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:59:27,667 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-07 03:59:27,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:27,757 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-07 03:59:27,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:59:27,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-07 03:59:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:27,768 INFO L225 Difference]: With dead ends: 29 [2019-11-07 03:59:27,768 INFO L226 Difference]: Without dead ends: 12 [2019-11-07 03:59:27,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:59:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-07 03:59:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-07 03:59:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-07 03:59:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-07 03:59:27,812 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-07 03:59:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:27,812 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-07 03:59:27,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:59:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-07 03:59:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 03:59:27,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:27,814 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:27,814 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1455464170, now seen corresponding path program 1 times [2019-11-07 03:59:27,815 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:27,816 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289067129] [2019-11-07 03:59:27,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:27,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289067129] [2019-11-07 03:59:27,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606308842] [2019-11-07 03:59:27,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:59:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:27,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 03:59:27,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:59:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:28,018 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:59:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:28,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1123091047] [2019-11-07 03:59:28,090 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:59:28,091 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:59:28,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:59:28,104 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:59:28,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:59:28,159 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 03:59:28,252 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2019-11-07 03:59:28,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 03:59:28,259 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:59:28,319 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 03:59:28,319 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4, 4] total 11 [2019-11-07 03:59:28,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802558418] [2019-11-07 03:59:28,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 03:59:28,322 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:28,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 03:59:28,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 03:59:28,323 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-11-07 03:59:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:30,366 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-07 03:59:30,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 03:59:30,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-07 03:59:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:30,368 INFO L225 Difference]: With dead ends: 12 [2019-11-07 03:59:30,368 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 03:59:30,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 03:59:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 03:59:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 03:59:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 03:59:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 03:59:30,371 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2019-11-07 03:59:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:30,373 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 03:59:30,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 03:59:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 03:59:30,374 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 03:59:30,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:59:30,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 03:59:30,624 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-11-07 03:59:30,624 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 03:59:30,625 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 03:59:30,625 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 03:59:30,625 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 03:59:30,625 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 03:59:30,625 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 18) the Hoare annotation is: true [2019-11-07 03:59:30,625 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 18) no Hoare annotation was computed. [2019-11-07 03:59:30,626 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 18) no Hoare annotation was computed. [2019-11-07 03:59:30,628 INFO L439 ceAbstractionStarter]: At program point L13-2(lines 13 15) the Hoare annotation is: (<= main_~x~0 268435440) [2019-11-07 03:59:30,628 INFO L439 ceAbstractionStarter]: At program point L13-3(lines 13 15) the Hoare annotation is: (and (<= main_~x~0 268435440) (<= (mod main_~x~0 4294967296) 0)) [2019-11-07 03:59:30,628 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-07 03:59:30,629 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-07 03:59:30,629 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-07 03:59:30,629 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-07 03:59:30,629 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-07 03:59:30,629 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-07 03:59:30,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 03:59:30 BoogieIcfgContainer [2019-11-07 03:59:30,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 03:59:30,654 INFO L168 Benchmark]: Toolchain (without parser) took 3988.34 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 102.7 MB in the beginning and 112.3 MB in the end (delta: -9.6 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2019-11-07 03:59:30,656 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 03:59:30,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.75 ms. Allocated memory is still 146.3 MB. Free memory was 102.5 MB in the beginning and 93.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-11-07 03:59:30,664 INFO L168 Benchmark]: Boogie Preprocessor took 111.44 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 93.4 MB in the beginning and 183.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-11-07 03:59:30,665 INFO L168 Benchmark]: RCFGBuilder took 227.64 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 172.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-11-07 03:59:30,666 INFO L168 Benchmark]: TraceAbstraction took 3433.31 ms. Allocated memory is still 203.9 MB. Free memory was 171.9 MB in the beginning and 112.3 MB in the end (delta: 59.6 MB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. [2019-11-07 03:59:30,679 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 206.75 ms. Allocated memory is still 146.3 MB. Free memory was 102.5 MB in the beginning and 93.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.44 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 93.4 MB in the beginning and 183.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 227.64 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 172.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3433.31 ms. Allocated memory is still 203.9 MB. Free memory was 171.9 MB in the beginning and 112.3 MB in the end (delta: 59.6 MB). Peak memory consumption was 59.6 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: 13]: Loop Invariant Derived loop invariant: x <= 268435440 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Result: SAFE, OverallTime: 3.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 2 SDslu, 24 SDs, 0 SdLazy, 11 SolverSat, 0 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 10 NumberOfFragments, 17 HoareAnnotationTreeSize, 8 FomulaSimplifications, 13 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 813 SizeOfPredicates, 1 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 170, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 10, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME[ms]: 7, TOOLS_POST_CALL_APPLICATIONS: 5, TOOLS_POST_CALL_TIME[ms]: 27, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 16, TOOLS_QUANTIFIERELIM_TIME[ms]: 28, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 24, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 36, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 17, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 37, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 12, DOMAIN_ISBOTTOM_APPLICATIONS: 10, DOMAIN_ISBOTTOM_TIME[ms]: 12, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 57, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 56, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME[ms]: 3, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 2, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 4, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 11, DAG_COMPRESSION_PROCESSED_NODES: 58, DAG_COMPRESSION_RETAINED_NODES: 43, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...