/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/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:19:43,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:19:43,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:19:43,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:19:43,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:19:43,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:19:43,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:19:43,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:19:43,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:19:43,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:19:43,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:19:43,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:19:43,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:19:43,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:19:43,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:19:43,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:19:43,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:19:43,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:19:43,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:19:43,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:19:43,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:19:43,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:19:43,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:19:43,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:19:43,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:19:43,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:19:43,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:19:43,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:19:43,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:19:43,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:19:43,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:19:43,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:19:43,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:19:43,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:19:43,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:19:43,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:19:43,267 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 04:19:43,288 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:19:43,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:19:43,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:19:43,289 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:19:43,290 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:19:43,290 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:19:43,290 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:19:43,290 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:19:43,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:19:43,291 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:19:43,292 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:19:43,292 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:19:43,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:19:43,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:19:43,293 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:19:43,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:19:43,294 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:19:43,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:19:43,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:19:43,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:19:43,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:19:43,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:19:43,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:19:43,295 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:19:43,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:19:43,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:19:43,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:19:43,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:19:43,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:19:43,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:19:43,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:19:43,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:19:43,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:19:43,298 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:19:43,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:19:43,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:19:43,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:19:43,300 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:19:43,562 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:19:43,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:19:43,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:19:43,579 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:19:43,579 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:19:43,580 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2019-11-24 04:19:43,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8f5092b/da7f122ccdbf48f7bfb2e53f4c434a61/FLAGaebcb80a9 [2019-11-24 04:19:44,054 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:19:44,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2019-11-24 04:19:44,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8f5092b/da7f122ccdbf48f7bfb2e53f4c434a61/FLAGaebcb80a9 [2019-11-24 04:19:44,459 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8f5092b/da7f122ccdbf48f7bfb2e53f4c434a61 [2019-11-24 04:19:44,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:19:44,469 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:19:44,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:19:44,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:19:44,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:19:44,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c2fb90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44, skipping insertion in model container [2019-11-24 04:19:44,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:19:44,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:19:44,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:19:44,703 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:19:44,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:19:44,734 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:19:44,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44 WrapperNode [2019-11-24 04:19:44,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:19:44,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:19:44,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:19:44,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:19:44,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:19:44,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:19:44,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:19:44,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:19:44,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (1/1) ... [2019-11-24 04:19:44,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:19:44,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:19:44,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:19:44,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:19:44,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (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 04:19:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:19:44,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:19:45,175 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:19:45,176 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 04:19:45,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:19:45 BoogieIcfgContainer [2019-11-24 04:19:45,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:19:45,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:19:45,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:19:45,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:19:45,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:19:44" (1/3) ... [2019-11-24 04:19:45,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a6cbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:19:45, skipping insertion in model container [2019-11-24 04:19:45,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:44" (2/3) ... [2019-11-24 04:19:45,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a6cbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:19:45, skipping insertion in model container [2019-11-24 04:19:45,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:19:45" (3/3) ... [2019-11-24 04:19:45,185 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2019-11-24 04:19:45,195 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:19:45,203 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:19:45,216 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:19:45,249 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:19:45,249 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:19:45,250 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:19:45,250 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:19:45,250 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:19:45,250 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:19:45,251 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:19:45,251 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:19:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-24 04:19:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:19:45,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:45,278 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:45,278 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash 262429726, now seen corresponding path program 1 times [2019-11-24 04:19:45,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:45,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829787003] [2019-11-24 04:19:45,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:45,495 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 04:19:45,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829787003] [2019-11-24 04:19:45,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:19:45,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 04:19:45,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541138562] [2019-11-24 04:19:45,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:19:45,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:45,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:19:45,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:19:45,520 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 6 states. [2019-11-24 04:19:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:45,731 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-24 04:19:45,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:19:45,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-24 04:19:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:45,744 INFO L225 Difference]: With dead ends: 41 [2019-11-24 04:19:45,744 INFO L226 Difference]: Without dead ends: 22 [2019-11-24 04:19:45,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-11-24 04:19:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-24 04:19:45,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2019-11-24 04:19:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-24 04:19:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-24 04:19:45,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-24 04:19:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:45,788 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-24 04:19:45,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:19:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-24 04:19:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:19:45,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:45,789 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:45,790 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:45,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:45,790 INFO L82 PathProgramCache]: Analyzing trace with hash -49415795, now seen corresponding path program 1 times [2019-11-24 04:19:45,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:45,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672075691] [2019-11-24 04:19:45,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:45,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672075691] [2019-11-24 04:19:45,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038129951] [2019-11-24 04:19:45,867 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 04:19:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:45,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-24 04:19:45,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:19:45,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:19:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:46,025 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:19:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:46,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-24 04:19:46,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 14 [2019-11-24 04:19:46,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466304969] [2019-11-24 04:19:46,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 04:19:46,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:46,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 04:19:46,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-24 04:19:46,105 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 7 states. [2019-11-24 04:19:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:46,255 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2019-11-24 04:19:46,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 04:19:46,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-24 04:19:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:46,257 INFO L225 Difference]: With dead ends: 28 [2019-11-24 04:19:46,257 INFO L226 Difference]: Without dead ends: 26 [2019-11-24 04:19:46,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-11-24 04:19:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-24 04:19:46,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2019-11-24 04:19:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:19:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-24 04:19:46,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 12 [2019-11-24 04:19:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:46,265 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-24 04:19:46,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-24 04:19:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-24 04:19:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:19:46,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:46,266 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:46,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:19:46,476 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1032707587, now seen corresponding path program 1 times [2019-11-24 04:19:46,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:46,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685090846] [2019-11-24 04:19:46,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:46,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685090846] [2019-11-24 04:19:46,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291906464] [2019-11-24 04:19:46,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:19:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:46,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 04:19:46,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:19:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:46,764 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:19:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:46,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1884231750] [2019-11-24 04:19:46,887 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-24 04:19:46,887 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:19:46,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:19:46,931 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:19:46,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:19:47,361 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:19:47,831 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2019-11-24 04:19:48,043 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2019-11-24 04:19:48,305 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2019-11-24 04:19:48,532 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2019-11-24 04:19:48,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:19:48,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 7, 7] total 24 [2019-11-24 04:19:48,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712000754] [2019-11-24 04:19:48,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-24 04:19:48,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-24 04:19:48,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-11-24 04:19:48,622 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 10 states. [2019-11-24 04:19:48,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:48,699 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2019-11-24 04:19:48,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-24 04:19:48,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-24 04:19:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:48,702 INFO L225 Difference]: With dead ends: 32 [2019-11-24 04:19:48,702 INFO L226 Difference]: Without dead ends: 30 [2019-11-24 04:19:48,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-11-24 04:19:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-24 04:19:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-11-24 04:19:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-24 04:19:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2019-11-24 04:19:48,712 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 15 [2019-11-24 04:19:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:48,712 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2019-11-24 04:19:48,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-24 04:19:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2019-11-24 04:19:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:19:48,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:48,713 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:48,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:19:48,917 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:48,917 INFO L82 PathProgramCache]: Analyzing trace with hash -487688392, now seen corresponding path program 1 times [2019-11-24 04:19:48,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:48,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333569597] [2019-11-24 04:19:48,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:19:49,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333569597] [2019-11-24 04:19:49,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118044541] [2019-11-24 04:19:49,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:19:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:49,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:19:49,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:19:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:19:49,105 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:19:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:19:49,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-24 04:19:49,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 14 [2019-11-24 04:19:49,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360962183] [2019-11-24 04:19:49,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:19:49,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:49,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:19:49,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-24 04:19:49,145 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 6 states. [2019-11-24 04:19:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:49,241 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2019-11-24 04:19:49,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:19:49,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-24 04:19:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:49,242 INFO L225 Difference]: With dead ends: 38 [2019-11-24 04:19:49,242 INFO L226 Difference]: Without dead ends: 29 [2019-11-24 04:19:49,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:19:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-24 04:19:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-24 04:19:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-24 04:19:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-24 04:19:49,257 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2019-11-24 04:19:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:49,257 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-24 04:19:49,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:19:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-24 04:19:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:19:49,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:49,259 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:49,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:19:49,471 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:49,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1039583688, now seen corresponding path program 2 times [2019-11-24 04:19:49,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:49,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200463954] [2019-11-24 04:19:49,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:49,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200463954] [2019-11-24 04:19:49,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299623108] [2019-11-24 04:19:49,554 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:19:49,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-11-24 04:19:49,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:19:49,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-24 04:19:49,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:19:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:19:49,626 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:19:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:19:49,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408269831] [2019-11-24 04:19:49,663 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-24 04:19:49,663 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:19:49,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:19:49,664 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:19:49,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:19:50,139 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 153 [2019-11-24 04:19:50,278 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 154 [2019-11-24 04:19:50,643 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 172 [2019-11-24 04:19:50,830 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 175 [2019-11-24 04:19:51,012 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 185 [2019-11-24 04:19:51,220 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 186 [2019-11-24 04:19:51,543 WARN L192 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 283 [2019-11-24 04:19:51,882 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 284 [2019-11-24 04:19:52,089 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 181 [2019-11-24 04:19:52,478 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 276 [2019-11-24 04:19:52,822 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 275 [2019-11-24 04:19:53,161 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 336 [2019-11-24 04:19:53,509 WARN L192 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2019-11-24 04:19:54,182 WARN L192 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 541 [2019-11-24 04:19:54,952 WARN L192 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 536 [2019-11-24 04:19:55,395 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 302 [2019-11-24 04:19:55,712 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 299 [2019-11-24 04:19:56,240 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 490 [2019-11-24 04:19:56,880 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 486 [2019-11-24 04:19:58,056 WARN L192 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 561 [2019-11-24 04:19:59,016 WARN L192 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 559 [2019-11-24 04:20:01,512 WARN L192 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 1056 DAG size of output: 1016 [2019-11-24 04:20:04,169 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 1013 DAG size of output: 986 [2019-11-24 04:20:05,039 WARN L192 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 492 [2019-11-24 04:20:05,812 WARN L192 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 488 [2019-11-24 04:20:07,443 WARN L192 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 943 DAG size of output: 874 [2019-11-24 04:20:09,739 WARN L192 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 868 DAG size of output: 853 [2019-11-24 04:20:11,845 WARN L192 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 967 DAG size of output: 930 [2019-11-24 04:20:14,390 WARN L192 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 917 DAG size of output: 911 [2019-11-24 04:20:19,537 WARN L192 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 1860 DAG size of output: 1714 [2019-11-24 04:20:26,462 WARN L192 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 1692 DAG size of output: 1668 [2019-11-24 04:20:28,746 WARN L192 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 901 DAG size of output: 888 [2019-11-24 04:20:31,965 WARN L192 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 887 DAG size of output: 883 [2019-11-24 04:20:37,472 WARN L192 SmtUtils]: Spent 5.10 s on a formula simplification. DAG size of input: 1899 DAG size of output: 1740 [2019-11-24 04:20:48,162 WARN L192 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 1719 DAG size of output: 1689 [2019-11-24 04:20:55,816 WARN L192 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 2005 DAG size of output: 1912 [2019-11-24 04:21:12,770 WARN L192 SmtUtils]: Spent 7.68 s on a formula simplification. DAG size of input: 1893 DAG size of output: 1880