/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_6.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:03:35,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:03:35,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:03:35,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 06:03:35,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 06:03:35,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 06:03:35,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 06:03:35,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 06:03:35,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 06:03:35,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 06:03:35,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 06:03:35,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 06:03:35,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 06:03:35,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 06:03:35,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 06:03:35,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 06:03:35,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 06:03:35,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 06:03:35,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 06:03:35,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 06:03:35,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 06:03:35,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 06:03:35,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 06:03:35,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 06:03:35,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 06:03:35,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 06:03:35,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 06:03:35,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 06:03:35,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 06:03:35,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 06:03:35,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 06:03:35,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 06:03:35,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 06:03:35,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:03:35,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:03:35,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:03:35,715 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 06:03:35,736 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:03:35,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:03:35,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:03:35,737 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:03:35,738 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:03:35,738 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:03:35,738 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:03:35,738 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:03:35,738 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:03:35,739 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:03:35,739 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:03:35,739 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:03:35,739 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:03:35,739 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:03:35,740 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:03:35,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:03:35,741 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:03:35,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:03:35,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:03:35,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:03:35,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:03:35,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:03:35,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:03:35,742 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:03:35,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:03:35,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:03:35,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:03:35,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:03:35,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:03:35,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:03:35,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:03:35,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:03:35,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:03:35,744 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:03:35,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:03:35,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:03:35,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:03:35,745 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:03:36,055 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:03:36,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:03:36,082 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:03:36,084 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:03:36,084 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:03:36,085 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_6.cil-2.c [2019-11-24 06:03:36,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1227cf60d/c174ff8a3c1a44619c46c3e9a26cc128/FLAG1da1701e6 [2019-11-24 06:03:36,741 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:03:36,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_6.cil-2.c [2019-11-24 06:03:36,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1227cf60d/c174ff8a3c1a44619c46c3e9a26cc128/FLAG1da1701e6 [2019-11-24 06:03:37,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1227cf60d/c174ff8a3c1a44619c46c3e9a26cc128 [2019-11-24 06:03:37,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:03:37,082 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:03:37,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:03:37,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:03:37,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:03:37,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dbd79e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37, skipping insertion in model container [2019-11-24 06:03:37,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:03:37,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:03:37,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:03:37,547 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:03:37,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:03:37,651 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:03:37,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37 WrapperNode [2019-11-24 06:03:37,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:03:37,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:03:37,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:03:37,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:03:37,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:03:37,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:03:37,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:03:37,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:03:37,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (1/1) ... [2019-11-24 06:03:37,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:03:37,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:03:37,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:03:37,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:03:37,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (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 06:03:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:03:37,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:03:38,005 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-24 06:03:38,843 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2019-11-24 06:03:38,844 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2019-11-24 06:03:39,240 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:03:39,241 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 06:03:39,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:03:39 BoogieIcfgContainer [2019-11-24 06:03:39,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:03:39,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:03:39,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:03:39,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:03:39,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:03:37" (1/3) ... [2019-11-24 06:03:39,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6fa33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:03:39, skipping insertion in model container [2019-11-24 06:03:39,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:37" (2/3) ... [2019-11-24 06:03:39,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6fa33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:03:39, skipping insertion in model container [2019-11-24 06:03:39,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:03:39" (3/3) ... [2019-11-24 06:03:39,254 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_6.cil-2.c [2019-11-24 06:03:39,264 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:03:39,272 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:03:39,283 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:03:39,326 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:03:39,327 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:03:39,327 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:03:39,327 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:03:39,327 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:03:39,328 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:03:39,328 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:03:39,328 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:03:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2019-11-24 06:03:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-24 06:03:39,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:39,362 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] [2019-11-24 06:03:39,362 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:39,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1729786037, now seen corresponding path program 1 times [2019-11-24 06:03:39,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:39,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043494806] [2019-11-24 06:03:39,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:39,676 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 06:03:39,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043494806] [2019-11-24 06:03:39,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:39,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:03:39,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816871267] [2019-11-24 06:03:39,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:39,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:39,703 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 3 states. [2019-11-24 06:03:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:39,938 INFO L93 Difference]: Finished difference Result 239 states and 416 transitions. [2019-11-24 06:03:39,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:39,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-24 06:03:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:39,953 INFO L225 Difference]: With dead ends: 239 [2019-11-24 06:03:39,954 INFO L226 Difference]: Without dead ends: 125 [2019-11-24 06:03:39,957 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 06:03:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-24 06:03:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2019-11-24 06:03:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-24 06:03:40,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 182 transitions. [2019-11-24 06:03:40,012 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 182 transitions. Word has length 39 [2019-11-24 06:03:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:40,013 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 182 transitions. [2019-11-24 06:03:40,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 182 transitions. [2019-11-24 06:03:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-24 06:03:40,016 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:40,016 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] [2019-11-24 06:03:40,016 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:40,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1538405893, now seen corresponding path program 1 times [2019-11-24 06:03:40,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:40,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109541853] [2019-11-24 06:03:40,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:40,103 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 06:03:40,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109541853] [2019-11-24 06:03:40,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:40,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:40,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299933503] [2019-11-24 06:03:40,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:40,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:40,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:40,109 INFO L87 Difference]: Start difference. First operand 123 states and 182 transitions. Second operand 3 states. [2019-11-24 06:03:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:40,294 INFO L93 Difference]: Finished difference Result 265 states and 398 transitions. [2019-11-24 06:03:40,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:40,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-11-24 06:03:40,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:40,298 INFO L225 Difference]: With dead ends: 265 [2019-11-24 06:03:40,298 INFO L226 Difference]: Without dead ends: 144 [2019-11-24 06:03:40,300 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 06:03:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-24 06:03:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2019-11-24 06:03:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-24 06:03:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 204 transitions. [2019-11-24 06:03:40,315 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 204 transitions. Word has length 53 [2019-11-24 06:03:40,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:40,315 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 204 transitions. [2019-11-24 06:03:40,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 204 transitions. [2019-11-24 06:03:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-24 06:03:40,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:40,319 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] [2019-11-24 06:03:40,319 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:40,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1000943609, now seen corresponding path program 1 times [2019-11-24 06:03:40,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:40,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142044928] [2019-11-24 06:03:40,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:40,420 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 06:03:40,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142044928] [2019-11-24 06:03:40,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:40,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 06:03:40,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906121419] [2019-11-24 06:03:40,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 06:03:40,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:40,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 06:03:40,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:03:40,423 INFO L87 Difference]: Start difference. First operand 142 states and 204 transitions. Second operand 4 states. [2019-11-24 06:03:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:40,737 INFO L93 Difference]: Finished difference Result 356 states and 536 transitions. [2019-11-24 06:03:40,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 06:03:40,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-11-24 06:03:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:40,742 INFO L225 Difference]: With dead ends: 356 [2019-11-24 06:03:40,742 INFO L226 Difference]: Without dead ends: 216 [2019-11-24 06:03:40,746 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 06:03:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-24 06:03:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 200. [2019-11-24 06:03:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-24 06:03:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 275 transitions. [2019-11-24 06:03:40,784 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 275 transitions. Word has length 70 [2019-11-24 06:03:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:40,785 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 275 transitions. [2019-11-24 06:03:40,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 06:03:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 275 transitions. [2019-11-24 06:03:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-24 06:03:40,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:40,795 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2019-11-24 06:03:40,795 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash 165968284, now seen corresponding path program 1 times [2019-11-24 06:03:40,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:40,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360969927] [2019-11-24 06:03:40,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-24 06:03:40,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360969927] [2019-11-24 06:03:40,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:40,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:40,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793684921] [2019-11-24 06:03:40,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:40,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:40,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:40,938 INFO L87 Difference]: Start difference. First operand 200 states and 275 transitions. Second operand 3 states. [2019-11-24 06:03:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:41,086 INFO L93 Difference]: Finished difference Result 413 states and 572 transitions. [2019-11-24 06:03:41,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:41,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2019-11-24 06:03:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:41,092 INFO L225 Difference]: With dead ends: 413 [2019-11-24 06:03:41,092 INFO L226 Difference]: Without dead ends: 215 [2019-11-24 06:03:41,094 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 06:03:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-11-24 06:03:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2019-11-24 06:03:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-11-24 06:03:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 291 transitions. [2019-11-24 06:03:41,120 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 291 transitions. Word has length 79 [2019-11-24 06:03:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:41,121 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 291 transitions. [2019-11-24 06:03:41,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 291 transitions. [2019-11-24 06:03:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-24 06:03:41,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:41,127 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2019-11-24 06:03:41,127 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash -47422185, now seen corresponding path program 1 times [2019-11-24 06:03:41,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:41,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618410880] [2019-11-24 06:03:41,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-24 06:03:41,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618410880] [2019-11-24 06:03:41,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:41,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:41,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019484005] [2019-11-24 06:03:41,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:41,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:41,247 INFO L87 Difference]: Start difference. First operand 213 states and 291 transitions. Second operand 3 states. [2019-11-24 06:03:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:41,441 INFO L93 Difference]: Finished difference Result 492 states and 686 transitions. [2019-11-24 06:03:41,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:41,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-11-24 06:03:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:41,443 INFO L225 Difference]: With dead ends: 492 [2019-11-24 06:03:41,443 INFO L226 Difference]: Without dead ends: 278 [2019-11-24 06:03:41,444 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 06:03:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-24 06:03:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2019-11-24 06:03:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2019-11-24 06:03:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 380 transitions. [2019-11-24 06:03:41,455 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 380 transitions. Word has length 90 [2019-11-24 06:03:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:41,455 INFO L462 AbstractCegarLoop]: Abstraction has 274 states and 380 transitions. [2019-11-24 06:03:41,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 380 transitions. [2019-11-24 06:03:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-24 06:03:41,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:41,457 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] [2019-11-24 06:03:41,458 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1720100627, now seen corresponding path program 1 times [2019-11-24 06:03:41,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:41,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267621558] [2019-11-24 06:03:41,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:41,545 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 06:03:41,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267621558] [2019-11-24 06:03:41,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:41,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:41,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325611485] [2019-11-24 06:03:41,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:41,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:41,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:41,548 INFO L87 Difference]: Start difference. First operand 274 states and 380 transitions. Second operand 3 states. [2019-11-24 06:03:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:41,675 INFO L93 Difference]: Finished difference Result 579 states and 813 transitions. [2019-11-24 06:03:41,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:41,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-11-24 06:03:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:41,678 INFO L225 Difference]: With dead ends: 579 [2019-11-24 06:03:41,678 INFO L226 Difference]: Without dead ends: 307 [2019-11-24 06:03:41,679 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 06:03:41,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2019-11-24 06:03:41,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 297. [2019-11-24 06:03:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2019-11-24 06:03:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 406 transitions. [2019-11-24 06:03:41,689 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 406 transitions. Word has length 90 [2019-11-24 06:03:41,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:41,690 INFO L462 AbstractCegarLoop]: Abstraction has 297 states and 406 transitions. [2019-11-24 06:03:41,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 406 transitions. [2019-11-24 06:03:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-24 06:03:41,692 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:41,692 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:41,692 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:41,693 INFO L82 PathProgramCache]: Analyzing trace with hash 97984518, now seen corresponding path program 1 times [2019-11-24 06:03:41,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:41,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155028205] [2019-11-24 06:03:41,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-24 06:03:41,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155028205] [2019-11-24 06:03:41,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:41,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:41,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436128795] [2019-11-24 06:03:41,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:41,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:41,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:41,758 INFO L87 Difference]: Start difference. First operand 297 states and 406 transitions. Second operand 3 states. [2019-11-24 06:03:41,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:41,895 INFO L93 Difference]: Finished difference Result 625 states and 866 transitions. [2019-11-24 06:03:41,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:41,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2019-11-24 06:03:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:41,898 INFO L225 Difference]: With dead ends: 625 [2019-11-24 06:03:41,898 INFO L226 Difference]: Without dead ends: 330 [2019-11-24 06:03:41,899 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 06:03:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2019-11-24 06:03:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 322. [2019-11-24 06:03:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2019-11-24 06:03:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 434 transitions. [2019-11-24 06:03:41,910 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 434 transitions. Word has length 114 [2019-11-24 06:03:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:41,910 INFO L462 AbstractCegarLoop]: Abstraction has 322 states and 434 transitions. [2019-11-24 06:03:41,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 434 transitions. [2019-11-24 06:03:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-24 06:03:41,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:41,912 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:41,913 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash 533235896, now seen corresponding path program 1 times [2019-11-24 06:03:41,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:41,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809911679] [2019-11-24 06:03:41,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-24 06:03:41,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809911679] [2019-11-24 06:03:41,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:41,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:41,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254446738] [2019-11-24 06:03:41,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:41,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:41,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:41,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:41,972 INFO L87 Difference]: Start difference. First operand 322 states and 434 transitions. Second operand 3 states. [2019-11-24 06:03:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:42,173 INFO L93 Difference]: Finished difference Result 649 states and 876 transitions. [2019-11-24 06:03:42,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:42,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2019-11-24 06:03:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:42,176 INFO L225 Difference]: With dead ends: 649 [2019-11-24 06:03:42,176 INFO L226 Difference]: Without dead ends: 328 [2019-11-24 06:03:42,176 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 06:03:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-11-24 06:03:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2019-11-24 06:03:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2019-11-24 06:03:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 436 transitions. [2019-11-24 06:03:42,187 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 436 transitions. Word has length 128 [2019-11-24 06:03:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:42,188 INFO L462 AbstractCegarLoop]: Abstraction has 325 states and 436 transitions. [2019-11-24 06:03:42,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 436 transitions. [2019-11-24 06:03:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-24 06:03:42,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:42,190 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:42,190 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1755648066, now seen corresponding path program 1 times [2019-11-24 06:03:42,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:42,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542722945] [2019-11-24 06:03:42,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-24 06:03:42,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542722945] [2019-11-24 06:03:42,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:42,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:42,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826663123] [2019-11-24 06:03:42,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:42,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:42,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:42,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:42,255 INFO L87 Difference]: Start difference. First operand 325 states and 436 transitions. Second operand 3 states. [2019-11-24 06:03:42,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:42,533 INFO L93 Difference]: Finished difference Result 677 states and 919 transitions. [2019-11-24 06:03:42,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:42,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2019-11-24 06:03:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:42,537 INFO L225 Difference]: With dead ends: 677 [2019-11-24 06:03:42,538 INFO L226 Difference]: Without dead ends: 354 [2019-11-24 06:03:42,539 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 06:03:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-11-24 06:03:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2019-11-24 06:03:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2019-11-24 06:03:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 466 transitions. [2019-11-24 06:03:42,556 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 466 transitions. Word has length 136 [2019-11-24 06:03:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:42,557 INFO L462 AbstractCegarLoop]: Abstraction has 352 states and 466 transitions. [2019-11-24 06:03:42,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 466 transitions. [2019-11-24 06:03:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-24 06:03:42,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:42,560 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:42,560 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1949255665, now seen corresponding path program 1 times [2019-11-24 06:03:42,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:42,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875883219] [2019-11-24 06:03:42,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-24 06:03:42,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875883219] [2019-11-24 06:03:42,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:42,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:42,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543875747] [2019-11-24 06:03:42,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:42,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:42,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:42,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:42,640 INFO L87 Difference]: Start difference. First operand 352 states and 466 transitions. Second operand 3 states. [2019-11-24 06:03:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:42,844 INFO L93 Difference]: Finished difference Result 731 states and 981 transitions. [2019-11-24 06:03:42,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:42,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2019-11-24 06:03:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:42,852 INFO L225 Difference]: With dead ends: 731 [2019-11-24 06:03:42,852 INFO L226 Difference]: Without dead ends: 381 [2019-11-24 06:03:42,853 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 06:03:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2019-11-24 06:03:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2019-11-24 06:03:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2019-11-24 06:03:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 498 transitions. [2019-11-24 06:03:42,867 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 498 transitions. Word has length 141 [2019-11-24 06:03:42,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:42,867 INFO L462 AbstractCegarLoop]: Abstraction has 381 states and 498 transitions. [2019-11-24 06:03:42,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:42,868 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 498 transitions. [2019-11-24 06:03:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-24 06:03:42,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:42,871 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:42,871 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1375292415, now seen corresponding path program 1 times [2019-11-24 06:03:42,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:42,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414360444] [2019-11-24 06:03:42,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-24 06:03:42,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414360444] [2019-11-24 06:03:42,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357119529] [2019-11-24 06:03:42,975 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 06:03:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:43,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 06:03:43,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:03:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-24 06:03:43,134 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:03:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-24 06:03:43,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009634383] [2019-11-24 06:03:43,212 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2019-11-24 06:03:43,213 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:03:43,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:03:43,226 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:03:43,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:03:43,694 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2019-11-24 06:03:43,823 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2019-11-24 06:03:43,950 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2019-11-24 06:03:44,120 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2019-11-24 06:03:44,470 WARN L192 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 242 [2019-11-24 06:03:44,670 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 254 [2019-11-24 06:03:44,780 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 254 [2019-11-24 06:03:45,043 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 266 [2019-11-24 06:03:45,186 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 266 [2019-11-24 06:03:45,370 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2019-11-24 06:03:45,564 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 277 [2019-11-24 06:03:45,742 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 277 [2019-11-24 06:03:45,902 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-24 06:03:46,093 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-24 06:03:46,229 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-24 06:03:46,354 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-24 06:03:46,529 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 291 [2019-11-24 06:03:46,861 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 294 [2019-11-24 06:03:47,462 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2019-11-24 06:03:47,577 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 300 [2019-11-24 06:03:47,688 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 300 [2019-11-24 06:03:47,934 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 329 [2019-11-24 06:03:48,074 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 329 [2019-11-24 06:03:48,216 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:03:48,335 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:03:48,438 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:03:48,547 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:03:48,776 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-24 06:03:49,093 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 353 [2019-11-24 06:03:49,382 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 335 [2019-11-24 06:03:49,570 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 335 [2019-11-24 06:03:49,794 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 339 [2019-11-24 06:03:49,910 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 339 [2019-11-24 06:03:50,078 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-24 06:03:50,343 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 358 [2019-11-24 06:03:50,532 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 358 [2019-11-24 06:03:50,704 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-11-24 06:03:50,966 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 378 [2019-11-24 06:03:51,291 WARN L192 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 378 [2019-11-24 06:03:51,553 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-24 06:03:51,864 WARN L192 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-24 06:03:52,116 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-24 06:03:52,368 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-24 06:03:52,605 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 356 [2019-11-24 06:03:52,754 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 356 [2019-11-24 06:03:52,919 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2019-11-24 06:03:53,586 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2019-11-24 06:03:54,523 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 06:03:55,241 WARN L192 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147 [2019-11-24 06:03:58,540 WARN L192 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 347 DAG size of output: 223 [2019-11-24 06:04:02,212 WARN L192 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 271 DAG size of output: 218 [2019-11-24 06:04:04,337 WARN L192 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 292 DAG size of output: 152 [2019-11-24 06:04:05,652 WARN L192 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 287 DAG size of output: 155 [2019-11-24 06:04:08,787 WARN L192 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 344 DAG size of output: 216 [2019-11-24 06:04:12,016 WARN L192 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 344 DAG size of output: 216 [2019-11-24 06:04:16,985 WARN L192 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 293 DAG size of output: 205 [2019-11-24 06:04:18,854 WARN L192 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 299 DAG size of output: 166 [2019-11-24 06:04:20,430 WARN L192 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 299 DAG size of output: 165 [2019-11-24 06:04:25,260 WARN L192 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 300 DAG size of output: 196 [2019-11-24 06:04:27,080 WARN L192 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 303 DAG size of output: 162 [2019-11-24 06:04:28,415 WARN L192 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 303 DAG size of output: 162 [2019-11-24 06:04:29,756 WARN L192 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 307 DAG size of output: 168 [2019-11-24 06:04:34,857 WARN L192 SmtUtils]: Spent 3.72 s on a formula simplification. DAG size of input: 304 DAG size of output: 192 [2019-11-24 06:04:36,793 WARN L192 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 307 DAG size of output: 170 [2019-11-24 06:04:38,586 WARN L192 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 313 DAG size of output: 185 [2019-11-24 06:04:40,330 WARN L192 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 314 DAG size of output: 182 [2019-11-24 06:04:41,992 WARN L192 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 308 DAG size of output: 183 [2019-11-24 06:04:47,034 WARN L192 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 308 DAG size of output: 189 [2019-11-24 06:04:49,207 WARN L192 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 311 DAG size of output: 181 [2019-11-24 06:04:51,180 WARN L192 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 314 DAG size of output: 184 [2019-11-24 06:04:53,119 WARN L192 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 315 DAG size of output: 182 [2019-11-24 06:04:55,075 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 317 DAG size of output: 184 [2019-11-24 06:04:59,220 WARN L192 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 312 DAG size of output: 166 [2019-11-24 06:05:04,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 06:05:04,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [4, 4, 4] total 31 [2019-11-24 06:05:04,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542486366] [2019-11-24 06:05:04,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-24 06:05:04,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:05:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-24 06:05:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2019-11-24 06:05:04,490 INFO L87 Difference]: Start difference. First operand 381 states and 498 transitions. Second operand 27 states. [2019-11-24 06:05:05,782 WARN L192 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 223 DAG size of output: 150 [2019-11-24 06:05:08,800 WARN L192 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 234 DAG size of output: 209