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/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:03:38,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:03:38,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:03:38,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:03:38,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:03:38,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:03:38,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:03:38,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:03:38,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:03:38,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:03:38,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:03:38,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:03:38,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:03:38,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:03:38,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:03:38,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:03:38,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:03:38,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:03:38,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:03:38,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:03:38,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:03:38,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:03:38,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:03:38,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:03:38,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:03:38,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:03:38,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:03:38,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:03:38,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:03:38,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:03:38,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:03:38,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:03:38,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:03:38,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:03:38,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:03:38,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:03:38,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:03:38,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:03:38,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:03:38,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:03:38,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:03:38,466 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 03:03:38,480 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:03:38,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:03:38,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:03:38,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:03:38,482 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:03:38,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:03:38,483 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:03:38,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:03:38,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:03:38,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:03:38,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:03:38,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:03:38,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:03:38,484 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:03:38,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:03:38,485 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:03:38,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:03:38,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:03:38,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:03:38,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:03:38,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:03:38,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:38,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:03:38,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:03:38,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:03:38,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:03:38,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:03:38,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:03:38,488 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 03:03:38,821 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:03:38,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:03:38,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:03:38,842 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:03:38,843 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:03:38,843 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2019-10-15 03:03:38,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4f57081a/517eb74ecf664450a155e4bf6a3235f8/FLAG33ae5c65c [2019-10-15 03:03:39,593 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:03:39,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c [2019-10-15 03:03:39,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4f57081a/517eb74ecf664450a155e4bf6a3235f8/FLAG33ae5c65c [2019-10-15 03:03:39,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4f57081a/517eb74ecf664450a155e4bf6a3235f8 [2019-10-15 03:03:39,957 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:03:39,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:03:39,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:39,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:03:39,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:03:39,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:39" (1/1) ... [2019-10-15 03:03:39,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3686b925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:39, skipping insertion in model container [2019-10-15 03:03:39,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:39" (1/1) ... [2019-10-15 03:03:39,976 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:03:40,001 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:03:40,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:40,262 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:03:40,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:40,466 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:03:40,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40 WrapperNode [2019-10-15 03:03:40,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:40,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:03:40,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:03:40,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:03:40,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40" (1/1) ... [2019-10-15 03:03:40,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40" (1/1) ... [2019-10-15 03:03:40,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40" (1/1) ... [2019-10-15 03:03:40,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40" (1/1) ... [2019-10-15 03:03:40,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40" (1/1) ... [2019-10-15 03:03:40,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40" (1/1) ... [2019-10-15 03:03:40,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40" (1/1) ... [2019-10-15 03:03:40,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:03:40,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:03:40,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:03:40,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:03:40,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40" (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 03:03:40,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:03:40,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:03:40,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:03:40,597 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2019-10-15 03:03:40,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:03:40,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2019-10-15 03:03:40,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:03:40,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:03:40,599 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2019-10-15 03:03:40,599 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2019-10-15 03:03:40,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:03:40,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-10-15 03:03:40,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2019-10-15 03:03:40,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:03:40,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:03:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:03:40,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:03:41,348 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:03:41,348 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-15 03:03:41,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:41 BoogieIcfgContainer [2019-10-15 03:03:41,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:03:41,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:03:41,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:03:41,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:03:41,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:03:39" (1/3) ... [2019-10-15 03:03:41,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64add7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:41, skipping insertion in model container [2019-10-15 03:03:41,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:40" (2/3) ... [2019-10-15 03:03:41,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64add7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:41, skipping insertion in model container [2019-10-15 03:03:41,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:41" (3/3) ... [2019-10-15 03:03:41,365 INFO L109 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2019-10-15 03:03:41,375 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:03:41,390 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:03:41,402 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:03:41,426 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:03:41,427 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:03:41,427 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:03:41,427 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:03:41,427 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:03:41,427 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:03:41,427 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:03:41,428 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:03:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-15 03:03:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:03:41,450 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:41,451 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:41,452 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash 133090448, now seen corresponding path program 1 times [2019-10-15 03:03:41,467 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:41,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321091589] [2019-10-15 03:03:41,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:41,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:41,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:41,725 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 03:03:41,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321091589] [2019-10-15 03:03:41,729 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:41,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:03:41,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821732849] [2019-10-15 03:03:41,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:03:41,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:41,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:03:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:03:41,756 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2019-10-15 03:03:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:41,852 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2019-10-15 03:03:41,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:03:41,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 03:03:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:41,866 INFO L225 Difference]: With dead ends: 74 [2019-10-15 03:03:41,866 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 03:03:41,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:03:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 03:03:41,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-15 03:03:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 03:03:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 03:03:41,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-10-15 03:03:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:41,912 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 03:03:41,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:03:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 03:03:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:03:41,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:41,913 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:41,914 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:41,914 INFO L82 PathProgramCache]: Analyzing trace with hash -455874738, now seen corresponding path program 1 times [2019-10-15 03:03:41,915 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:41,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613357708] [2019-10-15 03:03:41,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:41,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:41,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:42,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613357708] [2019-10-15 03:03:42,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903322702] [2019-10-15 03:03:42,034 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 03:03:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:42,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:03:42,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:42,182 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:42,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573525427] [2019-10-15 03:03:42,288 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:03:42,288 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:42,295 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:42,303 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:42,304 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:42,881 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 71 for LOIs [2019-10-15 03:03:43,190 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:43,225 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 34 for LOIs [2019-10-15 03:03:43,249 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:43,642 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-10-15 03:03:43,848 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-10-15 03:03:44,073 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2019-10-15 03:03:44,359 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2019-10-15 03:03:44,529 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:44,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 10] total 19 [2019-10-15 03:03:44,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493451678] [2019-10-15 03:03:44,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 03:03:44,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 03:03:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2019-10-15 03:03:44,544 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 19 states. [2019-10-15 03:03:44,805 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2019-10-15 03:03:45,035 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 03:03:45,355 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2019-10-15 03:03:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:45,704 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-10-15 03:03:45,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:03:45,704 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 12 [2019-10-15 03:03:45,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:45,705 INFO L225 Difference]: With dead ends: 32 [2019-10-15 03:03:45,706 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:03:45,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2019-10-15 03:03:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:03:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-10-15 03:03:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 03:03:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-15 03:03:45,714 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2019-10-15 03:03:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:45,714 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-15 03:03:45,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 03:03:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-15 03:03:45,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 03:03:45,715 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:45,715 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:45,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:45,920 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:45,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:45,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1514238960, now seen corresponding path program 2 times [2019-10-15 03:03:45,922 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:45,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174375936] [2019-10-15 03:03:45,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:45,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:45,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:46,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174375936] [2019-10-15 03:03:46,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336466276] [2019-10-15 03:03:46,080 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 03:03:46,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:03:46,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:46,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:03:46,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:46,211 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:46,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035218314] [2019-10-15 03:03:46,302 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:03:46,303 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:46,303 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:46,305 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:46,305 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:46,507 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 71 for LOIs [2019-10-15 03:03:46,751 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:46,777 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 34 for LOIs [2019-10-15 03:03:46,799 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:47,037 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-10-15 03:03:47,263 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-10-15 03:03:47,453 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2019-10-15 03:03:47,711 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2019-10-15 03:03:47,835 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:47,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 10] total 24 [2019-10-15 03:03:47,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015667168] [2019-10-15 03:03:47,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 03:03:47,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:47,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 03:03:47,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:03:47,838 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 24 states. [2019-10-15 03:03:48,010 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2019-10-15 03:03:48,196 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 03:03:48,597 WARN L191 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2019-10-15 03:03:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:49,007 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-10-15 03:03:49,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 03:03:49,014 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 15 [2019-10-15 03:03:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:49,015 INFO L225 Difference]: With dead ends: 37 [2019-10-15 03:03:49,016 INFO L226 Difference]: Without dead ends: 23 [2019-10-15 03:03:49,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-10-15 03:03:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-15 03:03:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-10-15 03:03:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:03:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-15 03:03:49,027 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2019-10-15 03:03:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:49,028 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-15 03:03:49,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 03:03:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-15 03:03:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 03:03:49,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:49,029 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:49,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:49,234 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash 225444816, now seen corresponding path program 3 times [2019-10-15 03:03:49,235 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:49,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698098158] [2019-10-15 03:03:49,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:49,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:49,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 03:03:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 03:03:49,404 INFO L168 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-15 03:03:49,404 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 03:03:49,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 03:03:49 BoogieIcfgContainer [2019-10-15 03:03:49,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 03:03:49,450 INFO L168 Benchmark]: Toolchain (without parser) took 9490.86 ms. Allocated memory was 142.6 MB in the beginning and 323.5 MB in the end (delta: 180.9 MB). Free memory was 100.1 MB in the beginning and 212.5 MB in the end (delta: -112.4 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:49,450 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 142.6 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 03:03:49,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 506.52 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 99.9 MB in the beginning and 176.0 MB in the end (delta: -76.1 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:49,452 INFO L168 Benchmark]: Boogie Preprocessor took 65.71 ms. Allocated memory is still 200.3 MB. Free memory was 176.0 MB in the beginning and 173.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:49,453 INFO L168 Benchmark]: RCFGBuilder took 816.41 ms. Allocated memory is still 200.3 MB. Free memory was 173.9 MB in the beginning and 129.4 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:49,454 INFO L168 Benchmark]: TraceAbstraction took 8095.90 ms. Allocated memory was 200.3 MB in the beginning and 323.5 MB in the end (delta: 123.2 MB). Free memory was 129.4 MB in the beginning and 212.5 MB in the end (delta: -83.2 MB). Peak memory consumption was 40.0 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:49,458 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 142.6 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 506.52 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 99.9 MB in the beginning and 176.0 MB in the end (delta: -76.1 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.71 ms. Allocated memory is still 200.3 MB. Free memory was 176.0 MB in the beginning and 173.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 816.41 ms. Allocated memory is still 200.3 MB. Free memory was 173.9 MB in the beginning and 129.4 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8095.90 ms. Allocated memory was 200.3 MB in the beginning and 323.5 MB in the end (delta: 123.2 MB). Free memory was 129.4 MB in the beginning and 212.5 MB in the end (delta: -83.2 MB). Peak memory consumption was 40.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_real at line 96, overapproximation of someBinaryArithmeticDOUBLEoperation at line 97. Possible FailurePath: [L69] double a[50][50], b[50], x[50]; [L86] int i, j, nmax = 50, n = 5, chkerr; [L87] double eps, w; [L89] eps = 1.0e-6 [L91] i = 0 VAL [a={-1:0}, b={2:0}, eps=1/1000000, i=0, n=5, nmax=50, x={1:0}] [L91] COND TRUE i <= n [L93] w = 0.0 [L94] j = 0 VAL [a={-1:0}, b={2:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={1:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) [L97] COND TRUE i == j [L97] EXPR a[i][j] [L97] a[i][j] *= 10.0 [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={-1:0}, a[i][j]=20014, b={2:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={1:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) [L97] COND FALSE !(i == j) [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={-1:0}, a[i][j]=20014, b={2:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={1:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) [L97] COND FALSE !(i == j) [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={-1:0}, a[i][j]=20014, b={2:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={1:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) [L97] COND FALSE !(i == j) [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={-1:0}, a[i][j]=20014, b={2:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={1:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) [L97] COND FALSE !(i == j) [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={-1:0}, a[i][j]=20014, b={2:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={1:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) [L97] COND FALSE !(i == j) [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={-1:0}, a[i][j]=20014, b={2:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={1:0}] [L94] COND FALSE !(j <= n) VAL [a={-1:0}, a[i][j]=20014, b={2:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={1:0}] [L100] CALL __VERIFIER_assert(i==2) VAL [\old(cond)=0, a={-1:0}, b={2:0}, x={1:0}] [L4] COND TRUE !(cond) VAL [\old(cond)=0, a={-1:0}, b={2:0}, cond=0, x={1:0}] [L5] __VERIFIER_error() VAL [\old(cond)=0, a={-1:0}, b={2:0}, cond=0, x={1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Result: UNSAFE, OverallTime: 8.0s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 65 SDslu, 110 SDs, 0 SdLazy, 237 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 2547 SizeOfPredicates, 4 NumberOfNonLiveVariables, 214 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 1459, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES: 44, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 22, TOOLS_POST_TIME[ms]: 513, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME[ms]: 41, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME[ms]: 20, TOOLS_QUANTIFIERELIM_APPLICATIONS: 36, TOOLS_QUANTIFIERELIM_TIME[ms]: 546, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 296, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 50, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 38, DOMAIN_JOIN_TIME[ms]: 627, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 112, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 42, DOMAIN_ISBOTTOM_APPLICATIONS: 2, DOMAIN_ISBOTTOM_TIME[ms]: 3, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 290, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 290, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME[ms]: 471, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 470, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 5, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 25, DAG_COMPRESSION_PROCESSED_NODES: 124, DAG_COMPRESSION_RETAINED_NODES: 88, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...