/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_clnt_3.cil-3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:01:51,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:01:51,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:01:51,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 06:01:51,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 06:01:51,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 06:01:51,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 06:01:51,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 06:01:51,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 06:01:51,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 06:01:51,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 06:01:51,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 06:01:51,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 06:01:51,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 06:01:51,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 06:01:51,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 06:01:51,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 06:01:51,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 06:01:51,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 06:01:51,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 06:01:51,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 06:01:51,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 06:01:51,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 06:01:51,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 06:01:51,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 06:01:51,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:01:51,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:01:51,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:01:51,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 06:01:51,142 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:01:51,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:01:51,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:01:51,143 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:01:51,143 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:01:51,143 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:01:51,143 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:01:51,144 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:01:51,144 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:01:51,144 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:01:51,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:01:51,144 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:01:51,145 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:01:51,145 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:01:51,145 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:01:51,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:01:51,146 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:01:51,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:01:51,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:01:51,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:01:51,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:01:51,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:01:51,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:01:51,147 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:01:51,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:01:51,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:01:51,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:01:51,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:01:51,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:01:51,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:01:51,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:01:51,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:01:51,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:01:51,149 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:01:51,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:01:51,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:01:51,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:01:51,150 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:01:51,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:01:51,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:01:51,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:01:51,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:01:51,419 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:01:51,420 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_clnt_3.cil-3.c [2019-11-24 06:01:51,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6728421/12d865ea38a84e99a67727fb747e6c75/FLAGd34878064 [2019-11-24 06:01:52,017 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:01:52,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_clnt_3.cil-3.c [2019-11-24 06:01:52,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6728421/12d865ea38a84e99a67727fb747e6c75/FLAGd34878064 [2019-11-24 06:01:52,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6728421/12d865ea38a84e99a67727fb747e6c75 [2019-11-24 06:01:52,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:01:52,366 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:01:52,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:01:52,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:01:52,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:01:52,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d0d784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52, skipping insertion in model container [2019-11-24 06:01:52,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:01:52,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:01:52,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:01:52,748 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:01:52,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:01:52,826 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:01:52,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52 WrapperNode [2019-11-24 06:01:52,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:01:52,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:01:52,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:01:52,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:01:52,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:01:52,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:01:52,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:01:52,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:01:52,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... [2019-11-24 06:01:52,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:01:52,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:01:52,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:01:52,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:01:52,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:01:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:01:53,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:01:53,157 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-24 06:01:53,756 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2019-11-24 06:01:53,756 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2019-11-24 06:01:54,091 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:01:54,091 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 06:01:54,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:01:54 BoogieIcfgContainer [2019-11-24 06:01:54,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:01:54,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:01:54,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:01:54,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:01:54,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:01:52" (1/3) ... [2019-11-24 06:01:54,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565f5581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:01:54, skipping insertion in model container [2019-11-24 06:01:54,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:01:52" (2/3) ... [2019-11-24 06:01:54,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565f5581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:01:54, skipping insertion in model container [2019-11-24 06:01:54,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:01:54" (3/3) ... [2019-11-24 06:01:54,100 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.cil-3.c [2019-11-24 06:01:54,109 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:01:54,117 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:01:54,128 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:01:54,152 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:01:54,152 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:01:54,153 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:01:54,153 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:01:54,153 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:01:54,153 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:01:54,153 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:01:54,153 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:01:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2019-11-24 06:01:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 06:01:54,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:54,174 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:54,175 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:54,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:54,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1858763464, now seen corresponding path program 1 times [2019-11-24 06:01:54,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:54,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77712726] [2019-11-24 06:01:54,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:54,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77712726] [2019-11-24 06:01:54,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:54,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:54,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351365448] [2019-11-24 06:01:54,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:54,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:54,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:54,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:54,419 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 3 states. [2019-11-24 06:01:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:54,642 INFO L93 Difference]: Finished difference Result 198 states and 340 transitions. [2019-11-24 06:01:54,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:54,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 06:01:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:54,657 INFO L225 Difference]: With dead ends: 198 [2019-11-24 06:01:54,657 INFO L226 Difference]: Without dead ends: 108 [2019-11-24 06:01:54,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-24 06:01:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2019-11-24 06:01:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-24 06:01:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 156 transitions. [2019-11-24 06:01:54,713 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 156 transitions. Word has length 19 [2019-11-24 06:01:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:54,714 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 156 transitions. [2019-11-24 06:01:54,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 156 transitions. [2019-11-24 06:01:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 06:01:54,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:54,716 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] [2019-11-24 06:01:54,716 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:54,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:54,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1791778336, now seen corresponding path program 1 times [2019-11-24 06:01:54,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:54,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833396486] [2019-11-24 06:01:54,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:54,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833396486] [2019-11-24 06:01:54,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:54,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:54,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18942506] [2019-11-24 06:01:54,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:54,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:54,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:54,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:54,783 INFO L87 Difference]: Start difference. First operand 103 states and 156 transitions. Second operand 3 states. [2019-11-24 06:01:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:54,999 INFO L93 Difference]: Finished difference Result 232 states and 356 transitions. [2019-11-24 06:01:54,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:54,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-24 06:01:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:55,001 INFO L225 Difference]: With dead ends: 232 [2019-11-24 06:01:55,001 INFO L226 Difference]: Without dead ends: 130 [2019-11-24 06:01:55,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-24 06:01:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2019-11-24 06:01:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-24 06:01:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 195 transitions. [2019-11-24 06:01:55,027 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 195 transitions. Word has length 20 [2019-11-24 06:01:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:55,028 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 195 transitions. [2019-11-24 06:01:55,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 195 transitions. [2019-11-24 06:01:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-24 06:01:55,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:55,031 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-24 06:01:55,032 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash -44246127, now seen corresponding path program 1 times [2019-11-24 06:01:55,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:55,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940438043] [2019-11-24 06:01:55,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:55,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940438043] [2019-11-24 06:01:55,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:55,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:55,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617774024] [2019-11-24 06:01:55,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:55,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:55,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:55,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:55,127 INFO L87 Difference]: Start difference. First operand 125 states and 195 transitions. Second operand 3 states. [2019-11-24 06:01:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:55,268 INFO L93 Difference]: Finished difference Result 270 states and 425 transitions. [2019-11-24 06:01:55,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:55,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-24 06:01:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:55,273 INFO L225 Difference]: With dead ends: 270 [2019-11-24 06:01:55,273 INFO L226 Difference]: Without dead ends: 146 [2019-11-24 06:01:55,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-24 06:01:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2019-11-24 06:01:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-24 06:01:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 227 transitions. [2019-11-24 06:01:55,299 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 227 transitions. Word has length 37 [2019-11-24 06:01:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:55,300 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 227 transitions. [2019-11-24 06:01:55,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 227 transitions. [2019-11-24 06:01:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-24 06:01:55,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:55,304 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-24 06:01:55,304 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:55,305 INFO L82 PathProgramCache]: Analyzing trace with hash -993559847, now seen corresponding path program 1 times [2019-11-24 06:01:55,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:55,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193122035] [2019-11-24 06:01:55,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:55,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193122035] [2019-11-24 06:01:55,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:55,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:55,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529887320] [2019-11-24 06:01:55,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:55,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:55,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:55,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:55,390 INFO L87 Difference]: Start difference. First operand 144 states and 227 transitions. Second operand 3 states. [2019-11-24 06:01:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:55,575 INFO L93 Difference]: Finished difference Result 289 states and 455 transitions. [2019-11-24 06:01:55,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:55,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-11-24 06:01:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:55,577 INFO L225 Difference]: With dead ends: 289 [2019-11-24 06:01:55,578 INFO L226 Difference]: Without dead ends: 146 [2019-11-24 06:01:55,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-24 06:01:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2019-11-24 06:01:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-24 06:01:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 225 transitions. [2019-11-24 06:01:55,600 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 225 transitions. Word has length 38 [2019-11-24 06:01:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:55,600 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 225 transitions. [2019-11-24 06:01:55,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 225 transitions. [2019-11-24 06:01:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-24 06:01:55,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:55,603 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-24 06:01:55,603 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:55,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1161955053, now seen corresponding path program 1 times [2019-11-24 06:01:55,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:55,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975703181] [2019-11-24 06:01:55,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 06:01:55,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975703181] [2019-11-24 06:01:55,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:55,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:55,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935506337] [2019-11-24 06:01:55,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:55,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:55,688 INFO L87 Difference]: Start difference. First operand 144 states and 225 transitions. Second operand 3 states. [2019-11-24 06:01:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:55,827 INFO L93 Difference]: Finished difference Result 308 states and 484 transitions. [2019-11-24 06:01:55,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:55,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-11-24 06:01:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:55,829 INFO L225 Difference]: With dead ends: 308 [2019-11-24 06:01:55,830 INFO L226 Difference]: Without dead ends: 165 [2019-11-24 06:01:55,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-24 06:01:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2019-11-24 06:01:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-24 06:01:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 252 transitions. [2019-11-24 06:01:55,840 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 252 transitions. Word has length 53 [2019-11-24 06:01:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:55,840 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 252 transitions. [2019-11-24 06:01:55,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 252 transitions. [2019-11-24 06:01:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-24 06:01:55,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:55,842 INFO L410 BasicCegarLoop]: trace histogram [3, 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] [2019-11-24 06:01:55,843 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:55,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1231123755, now seen corresponding path program 1 times [2019-11-24 06:01:55,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:55,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725564913] [2019-11-24 06:01:55,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 06:01:55,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725564913] [2019-11-24 06:01:55,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:55,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:55,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79472791] [2019-11-24 06:01:55,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:55,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:55,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:55,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:55,876 INFO L87 Difference]: Start difference. First operand 161 states and 252 transitions. Second operand 3 states. [2019-11-24 06:01:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:56,018 INFO L93 Difference]: Finished difference Result 325 states and 508 transitions. [2019-11-24 06:01:56,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:56,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-11-24 06:01:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:56,019 INFO L225 Difference]: With dead ends: 325 [2019-11-24 06:01:56,020 INFO L226 Difference]: Without dead ends: 165 [2019-11-24 06:01:56,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-24 06:01:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2019-11-24 06:01:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-24 06:01:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 249 transitions. [2019-11-24 06:01:56,030 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 249 transitions. Word has length 54 [2019-11-24 06:01:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:56,030 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 249 transitions. [2019-11-24 06:01:56,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 249 transitions. [2019-11-24 06:01:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-24 06:01:56,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:56,033 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-24 06:01:56,033 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:56,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1781082040, now seen corresponding path program 1 times [2019-11-24 06:01:56,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:56,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521115505] [2019-11-24 06:01:56,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:56,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521115505] [2019-11-24 06:01:56,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:56,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:56,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68652335] [2019-11-24 06:01:56,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:56,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,105 INFO L87 Difference]: Start difference. First operand 161 states and 249 transitions. Second operand 3 states. [2019-11-24 06:01:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:56,266 INFO L93 Difference]: Finished difference Result 360 states and 564 transitions. [2019-11-24 06:01:56,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:56,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2019-11-24 06:01:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:56,269 INFO L225 Difference]: With dead ends: 360 [2019-11-24 06:01:56,269 INFO L226 Difference]: Without dead ends: 199 [2019-11-24 06:01:56,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-11-24 06:01:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2019-11-24 06:01:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-24 06:01:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 314 transitions. [2019-11-24 06:01:56,278 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 314 transitions. Word has length 56 [2019-11-24 06:01:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:56,278 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 314 transitions. [2019-11-24 06:01:56,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 314 transitions. [2019-11-24 06:01:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-24 06:01:56,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:56,279 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:56,280 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash -719948547, now seen corresponding path program 1 times [2019-11-24 06:01:56,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:56,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494321186] [2019-11-24 06:01:56,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-24 06:01:56,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494321186] [2019-11-24 06:01:56,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:56,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:56,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537321058] [2019-11-24 06:01:56,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:56,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,316 INFO L87 Difference]: Start difference. First operand 199 states and 314 transitions. Second operand 3 states. [2019-11-24 06:01:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:56,459 INFO L93 Difference]: Finished difference Result 414 states and 655 transitions. [2019-11-24 06:01:56,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:56,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2019-11-24 06:01:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:56,461 INFO L225 Difference]: With dead ends: 414 [2019-11-24 06:01:56,461 INFO L226 Difference]: Without dead ends: 216 [2019-11-24 06:01:56,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-24 06:01:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2019-11-24 06:01:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-11-24 06:01:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 335 transitions. [2019-11-24 06:01:56,470 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 335 transitions. Word has length 66 [2019-11-24 06:01:56,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:56,471 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 335 transitions. [2019-11-24 06:01:56,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 335 transitions. [2019-11-24 06:01:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-24 06:01:56,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:56,472 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:56,472 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash -743423627, now seen corresponding path program 1 times [2019-11-24 06:01:56,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:56,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23995066] [2019-11-24 06:01:56,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-24 06:01:56,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23995066] [2019-11-24 06:01:56,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:56,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:56,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847577422] [2019-11-24 06:01:56,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:56,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:56,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:56,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,503 INFO L87 Difference]: Start difference. First operand 214 states and 335 transitions. Second operand 3 states. [2019-11-24 06:01:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:56,614 INFO L93 Difference]: Finished difference Result 429 states and 671 transitions. [2019-11-24 06:01:56,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:56,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2019-11-24 06:01:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:56,616 INFO L225 Difference]: With dead ends: 429 [2019-11-24 06:01:56,616 INFO L226 Difference]: Without dead ends: 216 [2019-11-24 06:01:56,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-24 06:01:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2019-11-24 06:01:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-11-24 06:01:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 330 transitions. [2019-11-24 06:01:56,625 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 330 transitions. Word has length 67 [2019-11-24 06:01:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:56,625 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 330 transitions. [2019-11-24 06:01:56,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 330 transitions. [2019-11-24 06:01:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-24 06:01:56,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:56,627 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2019-11-24 06:01:56,627 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:56,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:56,627 INFO L82 PathProgramCache]: Analyzing trace with hash 276795288, now seen corresponding path program 1 times [2019-11-24 06:01:56,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:56,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492338300] [2019-11-24 06:01:56,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-24 06:01:56,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492338300] [2019-11-24 06:01:56,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:56,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:56,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537478350] [2019-11-24 06:01:56,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:56,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:56,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:56,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,667 INFO L87 Difference]: Start difference. First operand 214 states and 330 transitions. Second operand 3 states. [2019-11-24 06:01:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:56,777 INFO L93 Difference]: Finished difference Result 442 states and 683 transitions. [2019-11-24 06:01:56,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:56,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-11-24 06:01:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:56,781 INFO L225 Difference]: With dead ends: 442 [2019-11-24 06:01:56,781 INFO L226 Difference]: Without dead ends: 229 [2019-11-24 06:01:56,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-11-24 06:01:56,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2019-11-24 06:01:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-11-24 06:01:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 346 transitions. [2019-11-24 06:01:56,791 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 346 transitions. Word has length 77 [2019-11-24 06:01:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:56,791 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 346 transitions. [2019-11-24 06:01:56,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 346 transitions. [2019-11-24 06:01:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-24 06:01:56,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:56,792 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2019-11-24 06:01:56,793 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:56,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:56,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1902768960, now seen corresponding path program 1 times [2019-11-24 06:01:56,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:56,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354430427] [2019-11-24 06:01:56,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-24 06:01:56,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354430427] [2019-11-24 06:01:56,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:56,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:56,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273478985] [2019-11-24 06:01:56,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:56,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:56,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:56,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,833 INFO L87 Difference]: Start difference. First operand 227 states and 346 transitions. Second operand 3 states. [2019-11-24 06:01:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:56,937 INFO L93 Difference]: Finished difference Result 455 states and 693 transitions. [2019-11-24 06:01:56,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:56,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2019-11-24 06:01:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:56,939 INFO L225 Difference]: With dead ends: 455 [2019-11-24 06:01:56,940 INFO L226 Difference]: Without dead ends: 229 [2019-11-24 06:01:56,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-11-24 06:01:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2019-11-24 06:01:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-11-24 06:01:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 340 transitions. [2019-11-24 06:01:56,949 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 340 transitions. Word has length 78 [2019-11-24 06:01:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:56,950 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 340 transitions. [2019-11-24 06:01:56,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 340 transitions. [2019-11-24 06:01:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-24 06:01:56,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:56,951 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:56,951 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:56,952 INFO L82 PathProgramCache]: Analyzing trace with hash 472502931, now seen corresponding path program 1 times [2019-11-24 06:01:56,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:56,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088420503] [2019-11-24 06:01:56,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 06:01:57,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088420503] [2019-11-24 06:01:57,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836300385] [2019-11-24 06:01:57,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:01:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:57,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-24 06:01:57,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:01:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-24 06:01:57,173 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:01:57,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:01:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-24 06:01:57,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831501526] [2019-11-24 06:01:57,290 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2019-11-24 06:01:57,290 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:01:57,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:01:57,304 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:01:57,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:01:57,593 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2019-11-24 06:01:57,767 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 222 [2019-11-24 06:01:57,976 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-24 06:01:58,182 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-24 06:01:58,315 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-24 06:01:58,524 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 245 [2019-11-24 06:01:58,807 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 248 [2019-11-24 06:01:59,008 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 268 [2019-11-24 06:01:59,135 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 268 [2019-11-24 06:01:59,429 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 277 [2019-11-24 06:01:59,586 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 277 [2019-11-24 06:01:59,738 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 276 [2019-11-24 06:01:59,934 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2019-11-24 06:02:00,127 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2019-11-24 06:02:00,258 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2019-11-24 06:02:00,548 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 295 [2019-11-24 06:02:00,858 WARN L192 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 295 [2019-11-24 06:02:01,035 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 279 [2019-11-24 06:02:01,165 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 279 [2019-11-24 06:02:01,267 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 279 [2019-11-24 06:02:01,428 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 295 [2019-11-24 06:02:01,564 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 295 [2019-11-24 06:02:01,733 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2019-11-24 06:02:01,886 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-24 06:02:02,042 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-24 06:02:02,195 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-24 06:02:02,453 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 314 [2019-11-24 06:02:02,861 WARN L192 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 314 [2019-11-24 06:02:03,101 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-24 06:02:03,226 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-24 06:02:03,339 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-24 06:02:03,645 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 311 [2019-11-24 06:02:03,848 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 311 [2019-11-24 06:02:04,016 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-11-24 06:02:04,206 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-24 06:02:04,404 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-24 06:02:04,610 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-24 06:02:05,392 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 325 [2019-11-24 06:02:05,527 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 325 [2019-11-24 06:02:05,696 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 06:02:05,878 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 285 [2019-11-24 06:02:05,984 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 285 [2019-11-24 06:02:06,202 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 304 [2019-11-24 06:02:06,423 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2019-11-24 06:02:06,901 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 332 [2019-11-24 06:02:07,115 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 332 [2019-11-24 06:02:07,333 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2019-11-24 06:02:07,541 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 332 [2019-11-24 06:02:07,750 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 332 [2019-11-24 06:02:07,971 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2019-11-24 06:02:08,198 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 332 [2019-11-24 06:02:08,408 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 332 [2019-11-24 06:02:08,618 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2019-11-24 06:02:09,428 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 288 [2019-11-24 06:02:09,722 WARN L192 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 288 [2019-11-24 06:02:10,007 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-24 06:02:10,306 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 288 [2019-11-24 06:02:10,488 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 288 [2019-11-24 06:02:10,606 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-24 06:02:11,021 WARN L192 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 314 [2019-11-24 06:02:11,423 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 314 [2019-11-24 06:02:11,745 WARN L192 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-24 06:02:11,998 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 314 [2019-11-24 06:02:12,163 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 314 [2019-11-24 06:02:12,317 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-24 06:02:12,575 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:02:12,762 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:02:12,948 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:02:13,135 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:02:13,322 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:02:13,521 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-24 06:02:13,749 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 330 [2019-11-24 06:02:13,962 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 330 [2019-11-24 06:02:14,149 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-24 06:02:14,239 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 06:02:19,280 WARN L192 SmtUtils]: Spent 4.97 s on a formula simplification. DAG size of input: 327 DAG size of output: 248 [2019-11-24 06:02:23,956 WARN L192 SmtUtils]: Spent 4.58 s on a formula simplification. DAG size of input: 329 DAG size of output: 245 [2019-11-24 06:02:24,823 WARN L192 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 151 [2019-11-24 06:02:25,698 WARN L192 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 157 [2019-11-24 06:02:26,667 WARN L192 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 167 [2019-11-24 06:02:27,776 WARN L192 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 169 [2019-11-24 06:02:32,807 WARN L192 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 326 DAG size of output: 237 [2019-11-24 06:02:37,895 WARN L192 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 327 DAG size of output: 238 [2019-11-24 06:02:42,263 WARN L192 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 332 DAG size of output: 229 [2019-11-24 06:02:44,994 WARN L192 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 343 DAG size of output: 178 [2019-11-24 06:02:46,759 WARN L192 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 368 DAG size of output: 185 [2019-11-24 06:02:50,541 WARN L192 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 344 DAG size of output: 223 [2019-11-24 06:02:52,550 WARN L192 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 347 DAG size of output: 185 [2019-11-24 06:02:54,266 WARN L192 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 344 DAG size of output: 187 [2019-11-24 06:02:58,640 WARN L192 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 348 DAG size of output: 218 [2019-11-24 06:03:00,927 WARN L192 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 351 DAG size of output: 186 [2019-11-24 06:03:03,198 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 351 DAG size of output: 190 [2019-11-24 06:03:05,228 WARN L192 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 353 DAG size of output: 193 [2019-11-24 06:03:09,992 WARN L192 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 352 DAG size of output: 214 [2019-11-24 06:03:12,414 WARN L192 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 355 DAG size of output: 194 [2019-11-24 06:03:14,449 WARN L192 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 335 DAG size of output: 195 [2019-11-24 06:03:15,764 WARN L192 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 258 DAG size of output: 196 [2019-11-24 06:03:19,997 WARN L192 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 356 DAG size of output: 209 [2019-11-24 06:03:22,639 WARN L192 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 359 DAG size of output: 195 [2019-11-24 06:03:24,791 WARN L192 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 354 DAG size of output: 196 [2019-11-24 06:03:24,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 06:03:24,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [5, 4, 3] total 33 [2019-11-24 06:03:24,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226496824] [2019-11-24 06:03:24,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-24 06:03:24,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-24 06:03:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2019-11-24 06:03:24,797 INFO L87 Difference]: Start difference. First operand 227 states and 340 transitions. Second operand 27 states.