/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_srvr_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:02:13,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:02:13,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:02:13,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 06:02:13,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 06:02:13,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 06:02:13,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 06:02:13,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 06:02:13,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 06:02:13,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 06:02:13,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 06:02:13,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 06:02:13,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 06:02:13,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 06:02:13,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 06:02:13,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 06:02:13,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 06:02:13,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 06:02:13,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 06:02:13,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 06:02:13,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 06:02:13,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 06:02:13,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 06:02:13,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 06:02:13,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 06:02:13,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 06:02:13,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 06:02:13,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 06:02:13,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 06:02:13,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 06:02:13,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 06:02:13,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 06:02:13,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 06:02:13,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:02:13,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:02:13,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:02:13,381 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 06:02:13,409 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:02:13,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:02:13,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:02:13,411 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:02:13,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:02:13,412 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:02:13,412 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:02:13,412 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:02:13,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:02:13,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:02:13,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:02:13,414 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:02:13,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:02:13,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:02:13,415 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:02:13,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:02:13,415 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:02:13,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:02:13,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:02:13,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:02:13,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:02:13,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:02:13,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:02:13,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:02:13,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:02:13,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:02:13,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:02:13,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:02:13,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:02:13,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:02:13,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:02:13,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:02:13,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:02:13,420 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:02:13,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:02:13,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:02:13,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:02:13,421 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:02:13,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:02:13,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:02:13,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:02:13,716 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:02:13,717 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:02:13,717 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1.cil-2.c [2019-11-24 06:02:13,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdda525a0/b467c5e2d4934c63997a59a3825b1c3d/FLAGd9aa55eb5 [2019-11-24 06:02:14,255 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:02:14,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1.cil-2.c [2019-11-24 06:02:14,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdda525a0/b467c5e2d4934c63997a59a3825b1c3d/FLAGd9aa55eb5 [2019-11-24 06:02:14,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdda525a0/b467c5e2d4934c63997a59a3825b1c3d [2019-11-24 06:02:14,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:02:14,673 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:02:14,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:02:14,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:02:14,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:02:14,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:02:14" (1/1) ... [2019-11-24 06:02:14,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74cf5dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:14, skipping insertion in model container [2019-11-24 06:02:14,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:02:14" (1/1) ... [2019-11-24 06:02:14,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:02:14,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:02:15,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:02:15,193 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:02:15,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:02:15,286 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:02:15,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15 WrapperNode [2019-11-24 06:02:15,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:02:15,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:02:15,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:02:15,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:02:15,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (1/1) ... [2019-11-24 06:02:15,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (1/1) ... [2019-11-24 06:02:15,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:02:15,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:02:15,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:02:15,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:02:15,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (1/1) ... [2019-11-24 06:02:15,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (1/1) ... [2019-11-24 06:02:15,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (1/1) ... [2019-11-24 06:02:15,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (1/1) ... [2019-11-24 06:02:15,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (1/1) ... [2019-11-24 06:02:15,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (1/1) ... [2019-11-24 06:02:15,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (1/1) ... [2019-11-24 06:02:15,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:02:15,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:02:15,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:02:15,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:02:15,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (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 06:02:15,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:02:15,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:02:15,623 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-24 06:02:16,248 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2019-11-24 06:02:16,248 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2019-11-24 06:02:16,545 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:02:16,546 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 06:02:16,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:02:16 BoogieIcfgContainer [2019-11-24 06:02:16,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:02:16,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:02:16,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:02:16,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:02:16,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:02:14" (1/3) ... [2019-11-24 06:02:16,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6716d2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:02:16, skipping insertion in model container [2019-11-24 06:02:16,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:02:15" (2/3) ... [2019-11-24 06:02:16,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6716d2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:02:16, skipping insertion in model container [2019-11-24 06:02:16,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:02:16" (3/3) ... [2019-11-24 06:02:16,558 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1.cil-2.c [2019-11-24 06:02:16,567 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:02:16,576 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:02:16,587 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:02:16,618 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:02:16,619 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:02:16,619 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:02:16,619 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:02:16,619 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:02:16,619 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:02:16,619 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:02:16,619 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:02:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2019-11-24 06:02:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-24 06:02:16,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:16,650 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:16,651 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1207567491, now seen corresponding path program 1 times [2019-11-24 06:02:16,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:16,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170601610] [2019-11-24 06:02:16,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:16,871 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 06:02:16,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170601610] [2019-11-24 06:02:16,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:02:16,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:02:16,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72868243] [2019-11-24 06:02:16,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:16,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:16,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:16,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:02:16,898 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 3 states. [2019-11-24 06:02:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:17,155 INFO L93 Difference]: Finished difference Result 233 states and 402 transitions. [2019-11-24 06:02:17,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:17,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-24 06:02:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:17,176 INFO L225 Difference]: With dead ends: 233 [2019-11-24 06:02:17,176 INFO L226 Difference]: Without dead ends: 122 [2019-11-24 06:02:17,184 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 06:02:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-24 06:02:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2019-11-24 06:02:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-24 06:02:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 176 transitions. [2019-11-24 06:02:17,268 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 176 transitions. Word has length 40 [2019-11-24 06:02:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:17,269 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 176 transitions. [2019-11-24 06:02:17,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 176 transitions. [2019-11-24 06:02:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-24 06:02:17,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:17,273 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:17,274 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:17,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:17,275 INFO L82 PathProgramCache]: Analyzing trace with hash 736524655, now seen corresponding path program 1 times [2019-11-24 06:02:17,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:17,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261736743] [2019-11-24 06:02:17,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:02:17,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261736743] [2019-11-24 06:02:17,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:02:17,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:02:17,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050242377] [2019-11-24 06:02:17,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:17,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:17,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:17,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:02:17,396 INFO L87 Difference]: Start difference. First operand 120 states and 176 transitions. Second operand 3 states. [2019-11-24 06:02:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:17,561 INFO L93 Difference]: Finished difference Result 259 states and 386 transitions. [2019-11-24 06:02:17,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:17,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-11-24 06:02:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:17,564 INFO L225 Difference]: With dead ends: 259 [2019-11-24 06:02:17,564 INFO L226 Difference]: Without dead ends: 141 [2019-11-24 06:02:17,565 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 06:02:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-24 06:02:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2019-11-24 06:02:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-24 06:02:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 198 transitions. [2019-11-24 06:02:17,578 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 198 transitions. Word has length 54 [2019-11-24 06:02:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:17,579 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 198 transitions. [2019-11-24 06:02:17,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 198 transitions. [2019-11-24 06:02:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-24 06:02:17,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:17,582 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:17,582 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:17,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:17,583 INFO L82 PathProgramCache]: Analyzing trace with hash -724255731, now seen corresponding path program 1 times [2019-11-24 06:02:17,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:17,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127960392] [2019-11-24 06:02:17,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 06:02:17,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127960392] [2019-11-24 06:02:17,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:02:17,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 06:02:17,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580222916] [2019-11-24 06:02:17,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 06:02:17,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:17,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 06:02:17,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:02:17,702 INFO L87 Difference]: Start difference. First operand 139 states and 198 transitions. Second operand 4 states. [2019-11-24 06:02:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:17,967 INFO L93 Difference]: Finished difference Result 321 states and 474 transitions. [2019-11-24 06:02:17,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 06:02:17,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2019-11-24 06:02:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:17,971 INFO L225 Difference]: With dead ends: 321 [2019-11-24 06:02:17,971 INFO L226 Difference]: Without dead ends: 184 [2019-11-24 06:02:17,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:02:17,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-24 06:02:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 177. [2019-11-24 06:02:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-24 06:02:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 240 transitions. [2019-11-24 06:02:17,986 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 240 transitions. Word has length 71 [2019-11-24 06:02:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:17,987 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 240 transitions. [2019-11-24 06:02:17,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 06:02:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 240 transitions. [2019-11-24 06:02:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-24 06:02:17,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:17,996 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:17,996 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:17,996 INFO L82 PathProgramCache]: Analyzing trace with hash 417934273, now seen corresponding path program 1 times [2019-11-24 06:02:17,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:17,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366303694] [2019-11-24 06:02:17,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-24 06:02:18,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366303694] [2019-11-24 06:02:18,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:02:18,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:02:18,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083197697] [2019-11-24 06:02:18,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:18,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:18,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:18,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:02:18,110 INFO L87 Difference]: Start difference. First operand 177 states and 240 transitions. Second operand 3 states. [2019-11-24 06:02:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:18,247 INFO L93 Difference]: Finished difference Result 385 states and 536 transitions. [2019-11-24 06:02:18,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:18,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2019-11-24 06:02:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:18,249 INFO L225 Difference]: With dead ends: 385 [2019-11-24 06:02:18,250 INFO L226 Difference]: Without dead ends: 210 [2019-11-24 06:02:18,251 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 06:02:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-24 06:02:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 200. [2019-11-24 06:02:18,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-24 06:02:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 266 transitions. [2019-11-24 06:02:18,262 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 266 transitions. Word has length 91 [2019-11-24 06:02:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:18,263 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 266 transitions. [2019-11-24 06:02:18,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 266 transitions. [2019-11-24 06:02:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-24 06:02:18,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:18,265 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-24 06:02:18,266 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash -47183470, now seen corresponding path program 1 times [2019-11-24 06:02:18,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:18,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419975277] [2019-11-24 06:02:18,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:02:18,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419975277] [2019-11-24 06:02:18,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543298444] [2019-11-24 06:02:18,407 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 06:02:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:18,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:02:18,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:02:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:02:18,564 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:02:18,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:02:18,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:02:18,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:02:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-24 06:02:18,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-24 06:02:18,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 7 [2019-11-24 06:02:18,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777616774] [2019-11-24 06:02:18,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:18,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:18,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-24 06:02:18,683 INFO L87 Difference]: Start difference. First operand 200 states and 266 transitions. Second operand 3 states. [2019-11-24 06:02:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:18,711 INFO L93 Difference]: Finished difference Result 398 states and 530 transitions. [2019-11-24 06:02:18,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:18,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2019-11-24 06:02:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:18,715 INFO L225 Difference]: With dead ends: 398 [2019-11-24 06:02:18,715 INFO L226 Difference]: Without dead ends: 396 [2019-11-24 06:02:18,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 211 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-24 06:02:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2019-11-24 06:02:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2019-11-24 06:02:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2019-11-24 06:02:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 528 transitions. [2019-11-24 06:02:18,750 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 528 transitions. Word has length 109 [2019-11-24 06:02:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:18,751 INFO L462 AbstractCegarLoop]: Abstraction has 396 states and 528 transitions. [2019-11-24 06:02:18,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 528 transitions. [2019-11-24 06:02:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-24 06:02:18,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:18,761 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:18,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:02:18,969 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash -629082109, now seen corresponding path program 1 times [2019-11-24 06:02:18,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:18,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228222406] [2019-11-24 06:02:18,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 97 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:02:19,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228222406] [2019-11-24 06:02:19,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430977201] [2019-11-24 06:02:19,087 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 06:02:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:19,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 06:02:19,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:02:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-24 06:02:19,209 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:02:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-24 06:02:19,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:02:19,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-24 06:02:19,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032093806] [2019-11-24 06:02:19,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:19,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:19,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-24 06:02:19,262 INFO L87 Difference]: Start difference. First operand 396 states and 528 transitions. Second operand 3 states. [2019-11-24 06:02:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:19,423 INFO L93 Difference]: Finished difference Result 848 states and 1162 transitions. [2019-11-24 06:02:19,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:19,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2019-11-24 06:02:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:19,429 INFO L225 Difference]: With dead ends: 848 [2019-11-24 06:02:19,430 INFO L226 Difference]: Without dead ends: 454 [2019-11-24 06:02:19,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-24 06:02:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2019-11-24 06:02:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2019-11-24 06:02:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2019-11-24 06:02:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 592 transitions. [2019-11-24 06:02:19,446 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 592 transitions. Word has length 148 [2019-11-24 06:02:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:19,446 INFO L462 AbstractCegarLoop]: Abstraction has 454 states and 592 transitions. [2019-11-24 06:02:19,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 592 transitions. [2019-11-24 06:02:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-24 06:02:19,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:19,449 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-24 06:02:19,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:02:19,658 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:19,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:19,658 INFO L82 PathProgramCache]: Analyzing trace with hash 820134145, now seen corresponding path program 1 times [2019-11-24 06:02:19,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:19,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555987091] [2019-11-24 06:02:19,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 172 proven. 94 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-24 06:02:19,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555987091] [2019-11-24 06:02:19,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618672794] [2019-11-24 06:02:19,775 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 06:02:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:19,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:02:19,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:02:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 172 proven. 94 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-24 06:02:19,945 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:02:19,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:02:19,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:02:19,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:02:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-24 06:02:20,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-24 06:02:20,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 6 [2019-11-24 06:02:20,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294401084] [2019-11-24 06:02:20,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:20,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:20,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:20,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-24 06:02:20,002 INFO L87 Difference]: Start difference. First operand 454 states and 592 transitions. Second operand 3 states. [2019-11-24 06:02:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:20,039 INFO L93 Difference]: Finished difference Result 905 states and 1181 transitions. [2019-11-24 06:02:20,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:20,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2019-11-24 06:02:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:20,044 INFO L225 Difference]: With dead ends: 905 [2019-11-24 06:02:20,044 INFO L226 Difference]: Without dead ends: 678 [2019-11-24 06:02:20,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 343 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-24 06:02:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-11-24 06:02:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 677. [2019-11-24 06:02:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2019-11-24 06:02:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 883 transitions. [2019-11-24 06:02:20,063 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 883 transitions. Word has length 175 [2019-11-24 06:02:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:20,063 INFO L462 AbstractCegarLoop]: Abstraction has 677 states and 883 transitions. [2019-11-24 06:02:20,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 883 transitions. [2019-11-24 06:02:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-24 06:02:20,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:20,067 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2019-11-24 06:02:20,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:02:20,271 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:20,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1954691476, now seen corresponding path program 1 times [2019-11-24 06:02:20,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:20,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441135486] [2019-11-24 06:02:20,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-24 06:02:20,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441135486] [2019-11-24 06:02:20,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:02:20,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:02:20,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535559303] [2019-11-24 06:02:20,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:20,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:20,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:20,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:02:20,349 INFO L87 Difference]: Start difference. First operand 677 states and 883 transitions. Second operand 3 states. [2019-11-24 06:02:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:20,540 INFO L93 Difference]: Finished difference Result 1499 states and 2025 transitions. [2019-11-24 06:02:20,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:20,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2019-11-24 06:02:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:20,545 INFO L225 Difference]: With dead ends: 1499 [2019-11-24 06:02:20,545 INFO L226 Difference]: Without dead ends: 824 [2019-11-24 06:02:20,547 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 06:02:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2019-11-24 06:02:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 794. [2019-11-24 06:02:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2019-11-24 06:02:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1018 transitions. [2019-11-24 06:02:20,593 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1018 transitions. Word has length 209 [2019-11-24 06:02:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:20,593 INFO L462 AbstractCegarLoop]: Abstraction has 794 states and 1018 transitions. [2019-11-24 06:02:20,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1018 transitions. [2019-11-24 06:02:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-24 06:02:20,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:20,597 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:20,597 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:20,598 INFO L82 PathProgramCache]: Analyzing trace with hash -677735642, now seen corresponding path program 1 times [2019-11-24 06:02:20,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:20,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80628874] [2019-11-24 06:02:20,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2019-11-24 06:02:20,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80628874] [2019-11-24 06:02:20,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:02:20,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:02:20,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445578003] [2019-11-24 06:02:20,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:20,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:20,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:20,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:02:20,660 INFO L87 Difference]: Start difference. First operand 794 states and 1018 transitions. Second operand 3 states. [2019-11-24 06:02:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:20,820 INFO L93 Difference]: Finished difference Result 1685 states and 2211 transitions. [2019-11-24 06:02:20,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:20,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2019-11-24 06:02:20,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:20,826 INFO L225 Difference]: With dead ends: 1685 [2019-11-24 06:02:20,829 INFO L226 Difference]: Without dead ends: 893 [2019-11-24 06:02:20,831 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 06:02:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2019-11-24 06:02:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 869. [2019-11-24 06:02:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 869 states. [2019-11-24 06:02:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1102 transitions. [2019-11-24 06:02:20,854 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1102 transitions. Word has length 215 [2019-11-24 06:02:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:20,855 INFO L462 AbstractCegarLoop]: Abstraction has 869 states and 1102 transitions. [2019-11-24 06:02:20,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1102 transitions. [2019-11-24 06:02:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-24 06:02:20,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:20,859 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:20,859 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:20,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1053985733, now seen corresponding path program 1 times [2019-11-24 06:02:20,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:20,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222857570] [2019-11-24 06:02:20,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-24 06:02:20,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222857570] [2019-11-24 06:02:20,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:02:20,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:02:20,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375294835] [2019-11-24 06:02:20,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:20,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:20,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:20,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:02:20,925 INFO L87 Difference]: Start difference. First operand 869 states and 1102 transitions. Second operand 3 states. [2019-11-24 06:02:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:21,125 INFO L93 Difference]: Finished difference Result 1897 states and 2479 transitions. [2019-11-24 06:02:21,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:21,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2019-11-24 06:02:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:21,131 INFO L225 Difference]: With dead ends: 1897 [2019-11-24 06:02:21,131 INFO L226 Difference]: Without dead ends: 1027 [2019-11-24 06:02:21,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 06:02:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2019-11-24 06:02:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 1010. [2019-11-24 06:02:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2019-11-24 06:02:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1333 transitions. [2019-11-24 06:02:21,184 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1333 transitions. Word has length 219 [2019-11-24 06:02:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:21,185 INFO L462 AbstractCegarLoop]: Abstraction has 1010 states and 1333 transitions. [2019-11-24 06:02:21,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1333 transitions. [2019-11-24 06:02:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-24 06:02:21,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:21,193 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:21,194 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:21,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1550258608, now seen corresponding path program 1 times [2019-11-24 06:02:21,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:21,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960499127] [2019-11-24 06:02:21,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 397 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-11-24 06:02:21,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960499127] [2019-11-24 06:02:21,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:02:21,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:02:21,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624163165] [2019-11-24 06:02:21,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:02:21,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:21,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:02:21,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:02:21,293 INFO L87 Difference]: Start difference. First operand 1010 states and 1333 transitions. Second operand 3 states. [2019-11-24 06:02:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:21,505 INFO L93 Difference]: Finished difference Result 2105 states and 2811 transitions. [2019-11-24 06:02:21,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:02:21,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2019-11-24 06:02:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:21,511 INFO L225 Difference]: With dead ends: 2105 [2019-11-24 06:02:21,511 INFO L226 Difference]: Without dead ends: 1097 [2019-11-24 06:02:21,513 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 06:02:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2019-11-24 06:02:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1091. [2019-11-24 06:02:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2019-11-24 06:02:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1423 transitions. [2019-11-24 06:02:21,556 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1423 transitions. Word has length 237 [2019-11-24 06:02:21,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:21,556 INFO L462 AbstractCegarLoop]: Abstraction has 1091 states and 1423 transitions. [2019-11-24 06:02:21,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:02:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1423 transitions. [2019-11-24 06:02:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-11-24 06:02:21,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:21,565 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:21,566 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:21,566 INFO L82 PathProgramCache]: Analyzing trace with hash 434201668, now seen corresponding path program 1 times [2019-11-24 06:02:21,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:21,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405717703] [2019-11-24 06:02:21,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 576 proven. 25 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-24 06:02:21,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405717703] [2019-11-24 06:02:21,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820047884] [2019-11-24 06:02:21,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 06:02:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:21,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 06:02:21,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:02:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2019-11-24 06:02:21,990 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:02:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2019-11-24 06:02:22,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:02:22,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [4] total 7 [2019-11-24 06:02:22,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712338870] [2019-11-24 06:02:22,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 06:02:22,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:02:22,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 06:02:22,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-24 06:02:22,071 INFO L87 Difference]: Start difference. First operand 1091 states and 1423 transitions. Second operand 5 states. [2019-11-24 06:02:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:02:22,527 INFO L93 Difference]: Finished difference Result 2391 states and 3213 transitions. [2019-11-24 06:02:22,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 06:02:22,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 269 [2019-11-24 06:02:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:02:22,534 INFO L225 Difference]: With dead ends: 2391 [2019-11-24 06:02:22,534 INFO L226 Difference]: Without dead ends: 1179 [2019-11-24 06:02:22,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 534 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-24 06:02:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2019-11-24 06:02:22,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1133. [2019-11-24 06:02:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1133 states. [2019-11-24 06:02:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1462 transitions. [2019-11-24 06:02:22,571 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1462 transitions. Word has length 269 [2019-11-24 06:02:22,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:02:22,572 INFO L462 AbstractCegarLoop]: Abstraction has 1133 states and 1462 transitions. [2019-11-24 06:02:22,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 06:02:22,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1462 transitions. [2019-11-24 06:02:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2019-11-24 06:02:22,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:02:22,578 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:02:22,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:02:22,784 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:02:22,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:02:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash -628500855, now seen corresponding path program 1 times [2019-11-24 06:02:22,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:02:22,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484467973] [2019-11-24 06:02:22,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:02:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 715 proven. 25 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-11-24 06:02:22,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484467973] [2019-11-24 06:02:22,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772527206] [2019-11-24 06:02:22,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:02:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:02:23,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 06:02:23,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:02:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 715 proven. 25 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-11-24 06:02:23,214 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:02:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 715 proven. 25 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-11-24 06:02:23,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053192526] [2019-11-24 06:02:23,401 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2019-11-24 06:02:23,401 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:02:23,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:02:23,418 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:02:23,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:02:24,089 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 214 [2019-11-24 06:02:24,248 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2019-11-24 06:02:24,607 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 234 [2019-11-24 06:02:24,798 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 236 [2019-11-24 06:02:25,347 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 257 [2019-11-24 06:02:25,533 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 257 [2019-11-24 06:02:25,689 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2019-11-24 06:02:25,878 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2019-11-24 06:02:26,052 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2019-11-24 06:02:26,226 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2019-11-24 06:02:26,487 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 280 [2019-11-24 06:02:26,761 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 283 [2019-11-24 06:02:27,202 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 273 [2019-11-24 06:02:27,329 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 273 [2019-11-24 06:02:27,458 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 271 [2019-11-24 06:02:27,634 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2019-11-24 06:02:27,780 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2019-11-24 06:02:27,895 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2019-11-24 06:02:28,108 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 303 [2019-11-24 06:02:28,501 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 301 [2019-11-24 06:02:29,281 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2019-11-24 06:02:30,031 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2019-11-24 06:02:30,362 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 298 [2019-11-24 06:02:30,645 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2019-11-24 06:02:30,794 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2019-11-24 06:02:31,602 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 351 [2019-11-24 06:02:31,851 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 355 [2019-11-24 06:02:33,335 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 339 [2019-11-24 06:02:33,515 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 339 [2019-11-24 06:02:33,680 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-24 06:02:33,862 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 339 [2019-11-24 06:02:34,033 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 339 [2019-11-24 06:02:34,218 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-24 06:02:34,361 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 305 [2019-11-24 06:02:34,700 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 352 [2019-11-24 06:02:34,858 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 352 [2019-11-24 06:02:34,988 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-24 06:02:35,148 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 352 [2019-11-24 06:02:35,343 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 352 [2019-11-24 06:02:35,472 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-24 06:02:35,629 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 352 [2019-11-24 06:02:35,792 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 352 [2019-11-24 06:02:35,923 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-24 06:02:36,253 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 281 [2019-11-24 06:02:36,813 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 308 [2019-11-24 06:02:36,921 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 308 [2019-11-24 06:02:37,032 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-24 06:02:37,479 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 322 [2019-11-24 06:02:37,645 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 322 [2019-11-24 06:02:37,778 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-24 06:02:37,910 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2019-11-24 06:02:38,011 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2019-11-24 06:02:38,112 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2019-11-24 06:02:38,256 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2019-11-24 06:02:38,399 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2019-11-24 06:02:38,543 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2019-11-24 06:02:38,713 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 326 [2019-11-24 06:02:38,866 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 326 [2019-11-24 06:02:39,013 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 06:02:39,163 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 326 [2019-11-24 06:02:39,314 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 326 [2019-11-24 06:02:39,460 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 06:02:39,638 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-24 06:02:39,804 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-24 06:02:39,990 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-24 06:02:40,146 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:02:40,282 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:02:40,418 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:02:40,554 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:02:40,690 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:02:40,825 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:02:41,022 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:02:41,188 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:02:41,350 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:02:41,352 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 06:02:41,857 WARN L192 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 127 [2019-11-24 06:02:46,462 WARN L192 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 317 DAG size of output: 232 [2019-11-24 06:02:50,945 WARN L192 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 307 DAG size of output: 222 [2019-11-24 06:02:53,167 WARN L192 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 334 DAG size of output: 133 [2019-11-24 06:02:54,537 WARN L192 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 346 DAG size of output: 136 [2019-11-24 06:02:58,749 WARN L192 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 314 DAG size of output: 221 [2019-11-24 06:03:02,924 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 316 DAG size of output: 223 [2019-11-24 06:03:07,472 WARN L192 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 335 DAG size of output: 209 [2019-11-24 06:03:09,327 WARN L192 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 341 DAG size of output: 140 [2019-11-24 06:03:10,848 WARN L192 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 340 DAG size of output: 142 [2019-11-24 06:03:15,514 WARN L192 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 342 DAG size of output: 204 [2019-11-24 06:03:17,163 WARN L192 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 345 DAG size of output: 142 [2019-11-24 06:03:18,571 WARN L192 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 345 DAG size of output: 143 [2019-11-24 06:03:19,983 WARN L192 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 347 DAG size of output: 149 [2019-11-24 06:03:25,997 WARN L192 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 346 DAG size of output: 200 [2019-11-24 06:03:27,975 WARN L192 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 349 DAG size of output: 150 [2019-11-24 06:03:29,912 WARN L192 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 355 DAG size of output: 166 [2019-11-24 06:03:31,801 WARN L192 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 356 DAG size of output: 163 [2019-11-24 06:03:33,472 WARN L192 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 349 DAG size of output: 163 [2019-11-24 06:03:39,762 WARN L192 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 350 DAG size of output: 195 [2019-11-24 06:03:41,692 WARN L192 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 342 DAG size of output: 163 [2019-11-24 06:03:43,379 WARN L192 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 345 DAG size of output: 166 [2019-11-24 06:03:45,061 WARN L192 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 346 DAG size of output: 164 [2019-11-24 06:03:46,769 WARN L192 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 348 DAG size of output: 166