/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/ssh-simplified/s3_clnt_3.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:01:47,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:01:47,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:01:47,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 06:01:47,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 06:01:47,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 06:01:47,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 06:01:47,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 06:01:47,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 06:01:47,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 06:01:47,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 06:01:47,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 06:01:47,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 06:01:47,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 06:01:47,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 06:01:47,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 06:01:47,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 06:01:47,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 06:01:47,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 06:01:47,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 06:01:47,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 06:01:47,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 06:01:47,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 06:01:47,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 06:01:47,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 06:01:47,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:01:47,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:01:47,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:01:47,377 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 06:01:47,392 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:01:47,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:01:47,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:01:47,395 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:01:47,395 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:01:47,396 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:01:47,396 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:01:47,396 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:01:47,396 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:01:47,396 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:01:47,397 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:01:47,397 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:01:47,397 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:01:47,397 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:01:47,397 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:01:47,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:01:47,399 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:01:47,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:01:47,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:01:47,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:01:47,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:01:47,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:01:47,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:01:47,400 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:01:47,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:01:47,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:01:47,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:01:47,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:01:47,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:01:47,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:01:47,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:01:47,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:01:47,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:01:47,402 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:01:47,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:01:47,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:01:47,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:01:47,403 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:01:47,670 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:01:47,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:01:47,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:01:47,696 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:01:47,696 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:01:47,697 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_clnt_3.cil-2.c [2019-11-24 06:01:47,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b39b50fa7/5c6175a3c23f4d4b8259d553bdf553f2/FLAGc8b4d9f8a [2019-11-24 06:01:48,278 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:01:48,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_clnt_3.cil-2.c [2019-11-24 06:01:48,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b39b50fa7/5c6175a3c23f4d4b8259d553bdf553f2/FLAGc8b4d9f8a [2019-11-24 06:01:48,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b39b50fa7/5c6175a3c23f4d4b8259d553bdf553f2 [2019-11-24 06:01:48,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:01:48,605 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:01:48,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:01:48,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:01:48,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:01:48,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:01:48" (1/1) ... [2019-11-24 06:01:48,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6777ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:48, skipping insertion in model container [2019-11-24 06:01:48,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:01:48" (1/1) ... [2019-11-24 06:01:48,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:01:48,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:01:48,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:01:48,933 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:01:49,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:01:49,099 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:01:49,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49 WrapperNode [2019-11-24 06:01:49,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:01:49,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:01:49,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:01:49,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:01:49,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (1/1) ... [2019-11-24 06:01:49,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (1/1) ... [2019-11-24 06:01:49,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:01:49,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:01:49,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:01:49,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:01:49,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (1/1) ... [2019-11-24 06:01:49,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (1/1) ... [2019-11-24 06:01:49,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (1/1) ... [2019-11-24 06:01:49,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (1/1) ... [2019-11-24 06:01:49,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (1/1) ... [2019-11-24 06:01:49,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (1/1) ... [2019-11-24 06:01:49,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (1/1) ... [2019-11-24 06:01:49,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:01:49,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:01:49,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:01:49,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:01:49,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (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 06:01:49,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:01:49,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:01:49,397 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-24 06:01:50,100 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2019-11-24 06:01:50,101 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2019-11-24 06:01:50,430 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:01:50,431 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 06:01:50,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:01:50 BoogieIcfgContainer [2019-11-24 06:01:50,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:01:50,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:01:50,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:01:50,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:01:50,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:01:48" (1/3) ... [2019-11-24 06:01:50,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5979bd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:01:50, skipping insertion in model container [2019-11-24 06:01:50,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:49" (2/3) ... [2019-11-24 06:01:50,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5979bd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:01:50, skipping insertion in model container [2019-11-24 06:01:50,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:01:50" (3/3) ... [2019-11-24 06:01:50,440 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.cil-2.c [2019-11-24 06:01:50,450 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:01:50,458 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:01:50,469 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:01:50,495 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:01:50,495 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:01:50,495 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:01:50,495 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:01:50,496 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:01:50,496 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:01:50,496 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:01:50,496 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:01:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2019-11-24 06:01:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 06:01:50,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:50,522 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:50,522 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash -97211781, now seen corresponding path program 1 times [2019-11-24 06:01:50,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:50,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306412704] [2019-11-24 06:01:50,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:50,721 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 06:01:50,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306412704] [2019-11-24 06:01:50,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:50,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:50,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719035603] [2019-11-24 06:01:50,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:50,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:50,742 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 3 states. [2019-11-24 06:01:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:50,969 INFO L93 Difference]: Finished difference Result 171 states and 295 transitions. [2019-11-24 06:01:50,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:50,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 06:01:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:50,987 INFO L225 Difference]: With dead ends: 171 [2019-11-24 06:01:50,987 INFO L226 Difference]: Without dead ends: 84 [2019-11-24 06:01:50,996 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 06:01:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-24 06:01:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-11-24 06:01:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-24 06:01:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2019-11-24 06:01:51,066 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 19 [2019-11-24 06:01:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:51,068 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2019-11-24 06:01:51,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2019-11-24 06:01:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-24 06:01:51,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:51,070 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:51,070 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:51,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:51,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1698514127, now seen corresponding path program 1 times [2019-11-24 06:01:51,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:51,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926173205] [2019-11-24 06:01:51,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:51,177 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 06:01:51,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926173205] [2019-11-24 06:01:51,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:51,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:01:51,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208705013] [2019-11-24 06:01:51,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:51,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:51,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:51,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:51,182 INFO L87 Difference]: Start difference. First operand 84 states and 121 transitions. Second operand 3 states. [2019-11-24 06:01:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:51,344 INFO L93 Difference]: Finished difference Result 180 states and 263 transitions. [2019-11-24 06:01:51,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:51,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-24 06:01:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:51,346 INFO L225 Difference]: With dead ends: 180 [2019-11-24 06:01:51,346 INFO L226 Difference]: Without dead ends: 99 [2019-11-24 06:01:51,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 06:01:51,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-24 06:01:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-11-24 06:01:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-24 06:01:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 137 transitions. [2019-11-24 06:01:51,357 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 137 transitions. Word has length 28 [2019-11-24 06:01:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:51,358 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 137 transitions. [2019-11-24 06:01:51,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 137 transitions. [2019-11-24 06:01:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-24 06:01:51,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:51,360 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:51,360 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:51,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1648774115, now seen corresponding path program 1 times [2019-11-24 06:01:51,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:51,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146095285] [2019-11-24 06:01:51,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:01:51,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146095285] [2019-11-24 06:01:51,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:51,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:01:51,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913388951] [2019-11-24 06:01:51,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:51,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:51,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:51,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:51,446 INFO L87 Difference]: Start difference. First operand 97 states and 137 transitions. Second operand 3 states. [2019-11-24 06:01:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:51,597 INFO L93 Difference]: Finished difference Result 208 states and 299 transitions. [2019-11-24 06:01:51,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:51,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-24 06:01:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:51,600 INFO L225 Difference]: With dead ends: 208 [2019-11-24 06:01:51,601 INFO L226 Difference]: Without dead ends: 114 [2019-11-24 06:01:51,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 06:01:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-24 06:01:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-24 06:01:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-24 06:01:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 155 transitions. [2019-11-24 06:01:51,611 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 155 transitions. Word has length 39 [2019-11-24 06:01:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:51,612 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 155 transitions. [2019-11-24 06:01:51,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 155 transitions. [2019-11-24 06:01:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-24 06:01:51,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:51,614 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:51,614 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -189523623, now seen corresponding path program 1 times [2019-11-24 06:01:51,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:51,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123708456] [2019-11-24 06:01:51,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:01:51,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123708456] [2019-11-24 06:01:51,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385649437] [2019-11-24 06:01:51,721 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 06:01:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:51,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 06:01:51,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:01:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-24 06:01:51,898 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:01:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-24 06:01:51,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:01:51,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2019-11-24 06:01:51,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984730339] [2019-11-24 06:01:51,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 06:01:51,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:51,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 06:01:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-24 06:01:51,945 INFO L87 Difference]: Start difference. First operand 112 states and 155 transitions. Second operand 6 states. [2019-11-24 06:01:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:52,287 INFO L93 Difference]: Finished difference Result 315 states and 470 transitions. [2019-11-24 06:01:52,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 06:01:52,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2019-11-24 06:01:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:52,290 INFO L225 Difference]: With dead ends: 315 [2019-11-24 06:01:52,290 INFO L226 Difference]: Without dead ends: 205 [2019-11-24 06:01:52,292 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-24 06:01:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-24 06:01:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 187. [2019-11-24 06:01:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-11-24 06:01:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 256 transitions. [2019-11-24 06:01:52,317 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 256 transitions. Word has length 52 [2019-11-24 06:01:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:52,318 INFO L462 AbstractCegarLoop]: Abstraction has 187 states and 256 transitions. [2019-11-24 06:01:52,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 06:01:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 256 transitions. [2019-11-24 06:01:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-24 06:01:52,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:52,324 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:52,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:01:52,529 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:52,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1726628277, now seen corresponding path program 1 times [2019-11-24 06:01:52,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:52,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008920975] [2019-11-24 06:01:52,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-24 06:01:52,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008920975] [2019-11-24 06:01:52,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:52,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:01:52,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323414991] [2019-11-24 06:01:52,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:52,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:52,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:52,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:52,647 INFO L87 Difference]: Start difference. First operand 187 states and 256 transitions. Second operand 3 states. [2019-11-24 06:01:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:52,759 INFO L93 Difference]: Finished difference Result 392 states and 545 transitions. [2019-11-24 06:01:52,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:52,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2019-11-24 06:01:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:52,762 INFO L225 Difference]: With dead ends: 392 [2019-11-24 06:01:52,762 INFO L226 Difference]: Without dead ends: 208 [2019-11-24 06:01:52,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 06:01:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-11-24 06:01:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2019-11-24 06:01:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-24 06:01:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 278 transitions. [2019-11-24 06:01:52,775 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 278 transitions. Word has length 68 [2019-11-24 06:01:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:52,776 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 278 transitions. [2019-11-24 06:01:52,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 278 transitions. [2019-11-24 06:01:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-24 06:01:52,778 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:52,778 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:52,779 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash -199469500, now seen corresponding path program 1 times [2019-11-24 06:01:52,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:52,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014485905] [2019-11-24 06:01:52,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 06:01:52,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014485905] [2019-11-24 06:01:52,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065643889] [2019-11-24 06:01:52,918 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 06:01:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:53,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-24 06:01:53,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:01:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-24 06:01:53,029 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:01:53,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:01:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 44 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-24 06:01:53,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1608260717] [2019-11-24 06:01:53,115 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2019-11-24 06:01:53,115 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:01:53,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:01:53,128 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:01:53,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:01:53,676 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2019-11-24 06:01:53,805 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2019-11-24 06:01:53,932 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2019-11-24 06:01:54,130 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2019-11-24 06:01:54,250 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2019-11-24 06:01:54,389 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2019-11-24 06:01:54,747 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 250 [2019-11-24 06:01:55,093 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 298 [2019-11-24 06:01:55,568 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2019-11-24 06:01:55,714 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2019-11-24 06:01:55,853 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2019-11-24 06:01:56,145 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 312 [2019-11-24 06:01:56,468 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 316 [2019-11-24 06:01:56,646 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-24 06:01:56,751 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-24 06:01:56,864 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-24 06:01:57,042 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2019-11-24 06:01:57,192 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2019-11-24 06:01:57,319 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2019-11-24 06:01:57,722 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 329 [2019-11-24 06:01:58,117 WARN L192 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 330 [2019-11-24 06:01:58,530 WARN L192 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:01:58,883 WARN L192 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:01:59,109 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:01:59,508 WARN L192 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:01:59,949 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:02:00,229 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:02:00,792 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:02:01,140 WARN L192 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:02:01,470 WARN L192 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:02:01,662 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:02:01,837 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:02:01,974 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:02:02,421 WARN L192 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:02:02,767 WARN L192 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:02:02,969 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:02:03,134 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:02:03,296 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:02:03,461 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:02:03,910 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 317 [2019-11-24 06:02:04,340 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 317 [2019-11-24 06:02:04,551 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2019-11-24 06:02:04,734 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 317 [2019-11-24 06:02:04,917 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 317 [2019-11-24 06:02:05,104 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2019-11-24 06:02:05,385 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 06:02:05,588 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 06:02:05,765 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 06:02:05,957 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 316 [2019-11-24 06:02:06,146 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 316 [2019-11-24 06:02:06,335 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:02:06,536 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-24 06:02:06,729 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-24 06:02:06,921 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-24 06:02:07,128 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-24 06:02:07,328 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-24 06:02:07,524 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-24 06:02:07,758 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-24 06:02:07,949 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-24 06:02:08,143 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-24 06:02:08,351 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2019-11-24 06:02:08,555 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2019-11-24 06:02:08,760 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2019-11-24 06:02:08,994 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 06:02:09,206 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 06:02:09,418 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 06:02:09,630 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 06:02:09,846 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 06:02:10,060 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 06:02:10,149 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 06:02:18,941 WARN L192 SmtUtils]: Spent 8.71 s on a formula simplification. DAG size of input: 312 DAG size of output: 271 [2019-11-24 06:02:27,402 WARN L192 SmtUtils]: Spent 8.36 s on a formula simplification. DAG size of input: 307 DAG size of output: 268 [2019-11-24 06:02:28,314 WARN L192 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 168 [2019-11-24 06:02:29,238 WARN L192 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2019-11-24 06:02:30,235 WARN L192 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 184 [2019-11-24 06:02:31,266 WARN L192 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 189 [2019-11-24 06:02:32,344 WARN L192 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 191 [2019-11-24 06:02:39,911 WARN L192 SmtUtils]: Spent 7.41 s on a formula simplification. DAG size of input: 308 DAG size of output: 263 [2019-11-24 06:02:47,632 WARN L192 SmtUtils]: Spent 7.54 s on a formula simplification. DAG size of input: 307 DAG size of output: 261 [2019-11-24 06:02:55,112 WARN L192 SmtUtils]: Spent 7.28 s on a formula simplification. DAG size of input: 309 DAG size of output: 257 [2019-11-24 06:02:57,150 WARN L192 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 221 DAG size of output: 198 [2019-11-24 06:02:58,349 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 224 DAG size of output: 201 [2019-11-24 06:03:05,821 WARN L192 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 321 DAG size of output: 251 [2019-11-24 06:03:07,984 WARN L192 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 326 DAG size of output: 217 [2019-11-24 06:03:09,701 WARN L192 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 328 DAG size of output: 213 [2019-11-24 06:03:17,329 WARN L192 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 327 DAG size of output: 236 [2019-11-24 06:03:19,802 WARN L192 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 330 DAG size of output: 211