/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:28:02,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:28:02,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:28:02,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:28:02,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:28:02,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:28:02,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:28:02,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:28:02,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:28:02,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:28:02,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:28:02,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:28:02,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:28:02,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:28:02,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:28:02,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:28:02,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:28:02,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:28:02,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:28:02,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:28:02,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:28:02,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:28:02,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:28:02,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:28:02,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 04:28:02,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 04:28:02,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 04:28:02,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 04:28:02,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 04:28:02,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 04:28:02,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:28:02,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:28:02,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:28:02,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:28:02,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:28:02,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:28:02,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:28:02,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:28:02,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:28:02,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:28:02,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:28:02,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:28:02,386 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:28:02,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:28:02,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:28:02,388 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:28:02,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:28:02,388 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:28:02,388 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:28:02,388 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:28:02,389 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:28:02,389 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:28:02,389 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:28:02,389 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:28:02,389 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:28:02,390 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:28:02,390 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:28:02,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:28:02,391 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:28:02,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:28:02,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:28:02,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:28:02,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:28:02,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:28:02,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:28:02,392 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:28:02,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:28:02,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:28:02,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:28:02,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:28:02,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:28:02,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:28:02,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:28:02,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:28:02,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:28:02,394 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:28:02,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:28:02,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:28:02,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:28:02,395 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:28:02,685 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:28:02,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:28:02,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:28:02,702 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:28:02,702 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:28:02,703 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2019-11-24 04:28:02,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a571baad/40fea3fc6112478ab1d71762bba7ec97/FLAG8422e8328 [2019-11-24 04:28:03,214 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:28:03,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2019-11-24 04:28:03,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a571baad/40fea3fc6112478ab1d71762bba7ec97/FLAG8422e8328 [2019-11-24 04:28:03,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a571baad/40fea3fc6112478ab1d71762bba7ec97 [2019-11-24 04:28:03,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:28:03,618 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:28:03,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:28:03,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:28:03,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:28:03,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fc49fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03, skipping insertion in model container [2019-11-24 04:28:03,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:28:03,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:28:03,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:28:03,813 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:28:03,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:28:03,836 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:28:03,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03 WrapperNode [2019-11-24 04:28:03,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:28:03,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:28:03,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:28:03,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:28:03,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:28:03,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:28:03,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:28:03,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:28:03,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (1/1) ... [2019-11-24 04:28:03,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:28:03,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:28:03,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:28:03,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:28:03,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (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 [2019-11-24 04:28:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:28:04,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:28:04,253 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:28:04,254 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:28:04,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:28:04 BoogieIcfgContainer [2019-11-24 04:28:04,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:28:04,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:28:04,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:28:04,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:28:04,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:28:03" (1/3) ... [2019-11-24 04:28:04,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147716a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:28:04, skipping insertion in model container [2019-11-24 04:28:04,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:03" (2/3) ... [2019-11-24 04:28:04,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147716a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:28:04, skipping insertion in model container [2019-11-24 04:28:04,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:28:04" (3/3) ... [2019-11-24 04:28:04,282 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2019-11-24 04:28:04,306 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:28:04,323 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:28:04,342 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:28:04,362 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:28:04,362 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:28:04,363 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:28:04,363 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:28:04,363 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:28:04,363 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:28:04,363 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:28:04,363 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:28:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-11-24 04:28:04,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:28:04,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:28:04,379 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:28:04,380 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:28:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:28:04,384 INFO L82 PathProgramCache]: Analyzing trace with hash 988646, now seen corresponding path program 1 times [2019-11-24 04:28:04,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:28:04,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474740780] [2019-11-24 04:28:04,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:28:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:28:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:04,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474740780] [2019-11-24 04:28:04,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:28:04,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:28:04,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308965939] [2019-11-24 04:28:04,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:28:04,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:28:04,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:28:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:28:04,569 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-11-24 04:28:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:28:04,600 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-11-24 04:28:04,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:28:04,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-24 04:28:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:28:04,615 INFO L225 Difference]: With dead ends: 13 [2019-11-24 04:28:04,616 INFO L226 Difference]: Without dead ends: 6 [2019-11-24 04:28:04,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:28:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-11-24 04:28:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-11-24 04:28:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-24 04:28:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-11-24 04:28:04,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-11-24 04:28:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:28:04,663 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-11-24 04:28:04,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:28:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-11-24 04:28:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:28:04,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:28:04,666 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:28:04,666 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:28:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:28:04,667 INFO L82 PathProgramCache]: Analyzing trace with hash 30749855, now seen corresponding path program 1 times [2019-11-24 04:28:04,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:28:04,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343109892] [2019-11-24 04:28:04,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:28:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:28:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:04,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343109892] [2019-11-24 04:28:04,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665902161] [2019-11-24 04:28:04,755 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 [2019-11-24 04:28:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:28:04,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:28:04,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:28:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:04,833 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:28:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:04,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729069820] [2019-11-24 04:28:04,906 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:28:04,906 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:28:04,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:28:04,947 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:28:04,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:28:05,721 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 217 [2019-11-24 04:28:05,880 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 217 [2019-11-24 04:28:06,247 WARN L192 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 493 [2019-11-24 04:28:06,652 WARN L192 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 488 [2019-11-24 04:28:07,581 WARN L192 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 1048 DAG size of output: 1038 [2019-11-24 04:28:08,539 WARN L192 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 1038 DAG size of output: 1035 [2019-11-24 04:28:10,319 WARN L192 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 1951 DAG size of output: 1940 [2019-11-24 04:28:12,725 WARN L192 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 1937 DAG size of output: 1932 [2019-11-24 04:28:16,910 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:28:21,917 WARN L192 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 1385 DAG size of output: 39 [2019-11-24 04:28:21,948 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:28:21,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:28:21,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2019-11-24 04:28:21,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012351308] [2019-11-24 04:28:21,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:28:21,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:28:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:28:21,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:28:21,952 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2019-11-24 04:28:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:28:21,967 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2019-11-24 04:28:21,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:28:21,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-11-24 04:28:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:28:21,968 INFO L225 Difference]: With dead ends: 12 [2019-11-24 04:28:21,968 INFO L226 Difference]: Without dead ends: 9 [2019-11-24 04:28:21,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:28:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-24 04:28:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-24 04:28:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:28:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-24 04:28:21,972 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2019-11-24 04:28:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:28:21,973 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-24 04:28:21,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:28:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-24 04:28:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:28:21,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:28:21,974 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2019-11-24 04:28:22,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:28:22,179 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:28:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:28:22,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1342012454, now seen corresponding path program 2 times [2019-11-24 04:28:22,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:28:22,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574984219] [2019-11-24 04:28:22,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:28:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:28:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:22,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574984219] [2019-11-24 04:28:22,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139954088] [2019-11-24 04:28:22,277 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 [2019-11-24 04:28:22,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-24 04:28:22,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:28:22,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 04:28:22,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:28:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:22,309 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:28:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:22,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2031338948] [2019-11-24 04:28:22,364 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:28:22,364 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:28:22,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:28:22,365 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:28:22,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:28:22,679 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 178 [2019-11-24 04:28:23,002 WARN L192 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 336 [2019-11-24 04:28:23,324 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 332 [2019-11-24 04:28:23,890 WARN L192 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 627 [2019-11-24 04:28:24,454 WARN L192 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 626 [2019-11-24 04:28:25,783 WARN L192 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1220 DAG size of output: 1217 [2019-11-24 04:28:26,996 WARN L192 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 1210 DAG size of output: 1207 [2019-11-24 04:28:31,885 WARN L192 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 2369 DAG size of output: 2361 [2019-11-24 04:28:36,078 WARN L192 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 2359 DAG size of output: 2343 [2019-11-24 04:28:41,125 WARN L192 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 2324 DAG size of output: 1230 [2019-11-24 04:28:42,345 WARN L192 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 1208 DAG size of output: 1208 [2019-11-24 04:28:47,811 WARN L192 SmtUtils]: Spent 5.34 s on a formula simplification that was a NOOP. DAG size: 2880 [2019-11-24 04:28:54,173 WARN L192 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 2881 DAG size of output: 1217 [2019-11-24 04:29:00,393 WARN L192 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 3128 DAG size of output: 3043 [2019-11-24 04:29:07,957 WARN L192 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1733 [2019-11-24 04:29:14,254 WARN L192 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 2970 DAG size of output: 2944 [2019-11-24 04:29:22,270 WARN L192 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 2932 DAG size of output: 2851