/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/product-lines/email_spec9_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:15:54,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:15:54,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:15:55,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:15:55,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:15:55,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:15:55,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:15:55,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:15:55,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:15:55,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:15:55,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:15:55,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:15:55,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:15:55,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:15:55,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:15:55,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:15:55,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:15:55,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:15:55,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:15:55,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:15:55,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:15:55,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:15:55,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:15:55,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:15:55,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:15:55,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:15:55,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:15:55,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:15:55,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:15:55,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:15:55,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:15:55,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:15:55,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:15:55,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:15:55,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:15:55,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:15:55,069 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 05:15:55,084 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:15:55,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:15:55,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:15:55,085 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:15:55,085 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:15:55,086 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:15:55,086 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:15:55,086 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:15:55,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:15:55,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:15:55,087 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:15:55,087 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:15:55,087 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:15:55,087 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:15:55,087 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:15:55,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:15:55,088 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:15:55,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:15:55,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:15:55,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:15:55,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:15:55,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:15:55,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:15:55,090 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:15:55,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:15:55,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:15:55,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:15:55,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:15:55,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:15:55,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:15:55,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:15:55,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:15:55,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:15:55,092 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:15:55,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:15:55,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:15:55,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:15:55,092 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:15:55,363 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:15:55,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:15:55,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:15:55,380 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:15:55,381 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:15:55,382 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec9_product32.cil.c [2019-11-24 05:15:55,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/086892731/a68bfb7ed4384cba9791c4a3e530d1b8/FLAGaf6ac4e77 [2019-11-24 05:15:56,061 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:15:56,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec9_product32.cil.c [2019-11-24 05:15:56,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/086892731/a68bfb7ed4384cba9791c4a3e530d1b8/FLAGaf6ac4e77 [2019-11-24 05:15:56,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/086892731/a68bfb7ed4384cba9791c4a3e530d1b8 [2019-11-24 05:15:56,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:15:56,353 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:15:56,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:15:56,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:15:56,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:15:56,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ccd47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56, skipping insertion in model container [2019-11-24 05:15:56,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:15:56,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:15:57,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:15:57,180 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:15:57,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:15:57,491 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:15:57,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57 WrapperNode [2019-11-24 05:15:57,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:15:57,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:15:57,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:15:57,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:15:57,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (1/1) ... [2019-11-24 05:15:57,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (1/1) ... [2019-11-24 05:15:57,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:15:57,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:15:57,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:15:57,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:15:57,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (1/1) ... [2019-11-24 05:15:57,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (1/1) ... [2019-11-24 05:15:57,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (1/1) ... [2019-11-24 05:15:57,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (1/1) ... [2019-11-24 05:15:57,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (1/1) ... [2019-11-24 05:15:57,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (1/1) ... [2019-11-24 05:15:57,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (1/1) ... [2019-11-24 05:15:57,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:15:57,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:15:57,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:15:57,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:15:57,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (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 05:15:57,998 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:15:58,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:15:58,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:15:58,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:15:58,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:16:18,127 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:16:18,128 INFO L284 CfgBuilder]: Removed 693 assume(true) statements. [2019-11-24 05:16:18,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:16:18 BoogieIcfgContainer [2019-11-24 05:16:18,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:16:18,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:16:18,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:16:18,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:16:18,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:15:56" (1/3) ... [2019-11-24 05:16:18,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ce4fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:16:18, skipping insertion in model container [2019-11-24 05:16:18,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:57" (2/3) ... [2019-11-24 05:16:18,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ce4fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:16:18, skipping insertion in model container [2019-11-24 05:16:18,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:16:18" (3/3) ... [2019-11-24 05:16:18,159 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec9_product32.cil.c [2019-11-24 05:16:18,175 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:16:18,195 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-24 05:16:18,214 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-24 05:16:18,258 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:16:18,259 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:16:18,259 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:16:18,259 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:16:18,259 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:16:18,260 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:16:18,260 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:16:18,260 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:16:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2019-11-24 05:16:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:16:18,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:18,310 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:18,311 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1231952467, now seen corresponding path program 1 times [2019-11-24 05:16:18,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:18,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982289954] [2019-11-24 05:16:18,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:18,845 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 05:16:18,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982289954] [2019-11-24 05:16:18,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:18,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:16:18,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357671591] [2019-11-24 05:16:18,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:16:18,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:18,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:16:18,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:16:18,874 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2019-11-24 05:16:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:18,909 INFO L93 Difference]: Finished difference Result 100 states and 153 transitions. [2019-11-24 05:16:18,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:16:18,911 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-24 05:16:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:18,927 INFO L225 Difference]: With dead ends: 100 [2019-11-24 05:16:18,927 INFO L226 Difference]: Without dead ends: 59 [2019-11-24 05:16:18,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:16:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-24 05:16:18,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-24 05:16:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-24 05:16:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 86 transitions. [2019-11-24 05:16:18,999 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 86 transitions. Word has length 8 [2019-11-24 05:16:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:19,000 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 86 transitions. [2019-11-24 05:16:19,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:16:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 86 transitions. [2019-11-24 05:16:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:16:19,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:19,001 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:19,002 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:19,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1131046584, now seen corresponding path program 1 times [2019-11-24 05:16:19,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:19,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172827942] [2019-11-24 05:16:19,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:19,130 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 05:16:19,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172827942] [2019-11-24 05:16:19,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:19,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:19,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046191860] [2019-11-24 05:16:19,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:19,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:19,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:19,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:19,134 INFO L87 Difference]: Start difference. First operand 59 states and 86 transitions. Second operand 3 states. [2019-11-24 05:16:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:19,160 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2019-11-24 05:16:19,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:19,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-24 05:16:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:19,164 INFO L225 Difference]: With dead ends: 94 [2019-11-24 05:16:19,164 INFO L226 Difference]: Without dead ends: 61 [2019-11-24 05:16:19,166 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 05:16:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-24 05:16:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-24 05:16:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-24 05:16:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2019-11-24 05:16:19,187 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 9 [2019-11-24 05:16:19,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:19,190 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2019-11-24 05:16:19,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2019-11-24 05:16:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 05:16:19,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:19,191 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:19,192 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:19,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:19,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2050865697, now seen corresponding path program 1 times [2019-11-24 05:16:19,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:19,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771608398] [2019-11-24 05:16:19,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:16:19,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771608398] [2019-11-24 05:16:19,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:19,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:16:19,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266345743] [2019-11-24 05:16:19,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:19,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:19,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:19,392 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand 3 states. [2019-11-24 05:16:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:19,514 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2019-11-24 05:16:19,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:19,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 05:16:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:19,517 INFO L225 Difference]: With dead ends: 86 [2019-11-24 05:16:19,517 INFO L226 Difference]: Without dead ends: 57 [2019-11-24 05:16:19,519 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 05:16:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-24 05:16:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-11-24 05:16:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-24 05:16:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 80 transitions. [2019-11-24 05:16:19,530 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 80 transitions. Word has length 13 [2019-11-24 05:16:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:19,531 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 80 transitions. [2019-11-24 05:16:19,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 80 transitions. [2019-11-24 05:16:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:16:19,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:19,532 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:19,533 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:19,533 INFO L82 PathProgramCache]: Analyzing trace with hash 718808160, now seen corresponding path program 1 times [2019-11-24 05:16:19,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:19,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033969913] [2019-11-24 05:16:19,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:16:19,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033969913] [2019-11-24 05:16:19,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:19,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 05:16:19,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044775407] [2019-11-24 05:16:19,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 05:16:19,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 05:16:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:16:19,777 INFO L87 Difference]: Start difference. First operand 55 states and 80 transitions. Second operand 5 states. [2019-11-24 05:16:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:19,988 INFO L93 Difference]: Finished difference Result 124 states and 174 transitions. [2019-11-24 05:16:19,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:16:19,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-24 05:16:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:19,991 INFO L225 Difference]: With dead ends: 124 [2019-11-24 05:16:19,991 INFO L226 Difference]: Without dead ends: 101 [2019-11-24 05:16:19,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:16:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-24 05:16:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2019-11-24 05:16:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-24 05:16:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 129 transitions. [2019-11-24 05:16:20,002 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 129 transitions. Word has length 15 [2019-11-24 05:16:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:20,002 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 129 transitions. [2019-11-24 05:16:20,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 05:16:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 129 transitions. [2019-11-24 05:16:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 05:16:20,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:20,004 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:20,004 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:20,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1793930635, now seen corresponding path program 1 times [2019-11-24 05:16:20,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:20,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646022796] [2019-11-24 05:16:20,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:16:20,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646022796] [2019-11-24 05:16:20,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:20,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-24 05:16:20,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316382693] [2019-11-24 05:16:20,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 05:16:20,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:20,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 05:16:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-24 05:16:20,314 INFO L87 Difference]: Start difference. First operand 81 states and 129 transitions. Second operand 8 states. [2019-11-24 05:16:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:21,287 INFO L93 Difference]: Finished difference Result 153 states and 248 transitions. [2019-11-24 05:16:21,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 05:16:21,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-24 05:16:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:21,290 INFO L225 Difference]: With dead ends: 153 [2019-11-24 05:16:21,291 INFO L226 Difference]: Without dead ends: 133 [2019-11-24 05:16:21,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-11-24 05:16:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-24 05:16:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2019-11-24 05:16:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-24 05:16:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 220 transitions. [2019-11-24 05:16:21,308 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 220 transitions. Word has length 18 [2019-11-24 05:16:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:21,308 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 220 transitions. [2019-11-24 05:16:21,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 05:16:21,309 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 220 transitions. [2019-11-24 05:16:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 05:16:21,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:21,310 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:21,311 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1507177448, now seen corresponding path program 1 times [2019-11-24 05:16:21,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:21,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172045056] [2019-11-24 05:16:21,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:21,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172045056] [2019-11-24 05:16:21,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:21,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:21,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006384562] [2019-11-24 05:16:21,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:21,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:21,389 INFO L87 Difference]: Start difference. First operand 129 states and 220 transitions. Second operand 3 states. [2019-11-24 05:16:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:21,422 INFO L93 Difference]: Finished difference Result 379 states and 648 transitions. [2019-11-24 05:16:21,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:21,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 05:16:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:21,427 INFO L225 Difference]: With dead ends: 379 [2019-11-24 05:16:21,427 INFO L226 Difference]: Without dead ends: 252 [2019-11-24 05:16:21,431 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 05:16:21,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-11-24 05:16:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 221. [2019-11-24 05:16:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-24 05:16:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 393 transitions. [2019-11-24 05:16:21,473 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 393 transitions. Word has length 19 [2019-11-24 05:16:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:21,473 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 393 transitions. [2019-11-24 05:16:21,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 393 transitions. [2019-11-24 05:16:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 05:16:21,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:21,481 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:21,482 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:21,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash 160565373, now seen corresponding path program 1 times [2019-11-24 05:16:21,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:21,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980803326] [2019-11-24 05:16:21,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:16:21,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980803326] [2019-11-24 05:16:21,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:21,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 05:16:21,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14736352] [2019-11-24 05:16:21,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 05:16:21,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:21,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 05:16:21,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-24 05:16:21,891 INFO L87 Difference]: Start difference. First operand 221 states and 393 transitions. Second operand 7 states. [2019-11-24 05:16:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:22,933 INFO L93 Difference]: Finished difference Result 343 states and 601 transitions. [2019-11-24 05:16:22,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 05:16:22,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-24 05:16:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:22,937 INFO L225 Difference]: With dead ends: 343 [2019-11-24 05:16:22,938 INFO L226 Difference]: Without dead ends: 331 [2019-11-24 05:16:22,938 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-11-24 05:16:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-11-24 05:16:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 323. [2019-11-24 05:16:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2019-11-24 05:16:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 579 transitions. [2019-11-24 05:16:22,967 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 579 transitions. Word has length 20 [2019-11-24 05:16:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:22,967 INFO L462 AbstractCegarLoop]: Abstraction has 323 states and 579 transitions. [2019-11-24 05:16:22,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-24 05:16:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 579 transitions. [2019-11-24 05:16:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-24 05:16:22,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:22,969 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:22,969 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:22,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:22,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1545254353, now seen corresponding path program 1 times [2019-11-24 05:16:22,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:22,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104756158] [2019-11-24 05:16:22,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:16:23,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104756158] [2019-11-24 05:16:23,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:23,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-24 05:16:23,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325997050] [2019-11-24 05:16:23,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-24 05:16:23,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:23,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-24 05:16:23,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-24 05:16:23,501 INFO L87 Difference]: Start difference. First operand 323 states and 579 transitions. Second operand 11 states. [2019-11-24 05:16:25,184 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-11-24 05:16:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:25,474 INFO L93 Difference]: Finished difference Result 532 states and 960 transitions. [2019-11-24 05:16:25,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-24 05:16:25,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-11-24 05:16:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:25,484 INFO L225 Difference]: With dead ends: 532 [2019-11-24 05:16:25,484 INFO L226 Difference]: Without dead ends: 519 [2019-11-24 05:16:25,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2019-11-24 05:16:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2019-11-24 05:16:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 313. [2019-11-24 05:16:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2019-11-24 05:16:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 565 transitions. [2019-11-24 05:16:25,518 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 565 transitions. Word has length 22 [2019-11-24 05:16:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:25,518 INFO L462 AbstractCegarLoop]: Abstraction has 313 states and 565 transitions. [2019-11-24 05:16:25,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-24 05:16:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 565 transitions. [2019-11-24 05:16:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-24 05:16:25,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:25,520 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:25,520 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1764165943, now seen corresponding path program 1 times [2019-11-24 05:16:25,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:25,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508412878] [2019-11-24 05:16:25,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:25,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508412878] [2019-11-24 05:16:25,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:25,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:25,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052409476] [2019-11-24 05:16:25,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:25,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:25,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:25,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:25,580 INFO L87 Difference]: Start difference. First operand 313 states and 565 transitions. Second operand 3 states. [2019-11-24 05:16:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:25,633 INFO L93 Difference]: Finished difference Result 791 states and 1420 transitions. [2019-11-24 05:16:25,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:25,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-24 05:16:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:25,637 INFO L225 Difference]: With dead ends: 791 [2019-11-24 05:16:25,637 INFO L226 Difference]: Without dead ends: 480 [2019-11-24 05:16:25,639 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 05:16:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2019-11-24 05:16:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 449. [2019-11-24 05:16:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2019-11-24 05:16:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 812 transitions. [2019-11-24 05:16:25,687 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 812 transitions. Word has length 23 [2019-11-24 05:16:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:25,687 INFO L462 AbstractCegarLoop]: Abstraction has 449 states and 812 transitions. [2019-11-24 05:16:25,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 812 transitions. [2019-11-24 05:16:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-24 05:16:25,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:25,688 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:25,689 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1666541551, now seen corresponding path program 1 times [2019-11-24 05:16:25,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:25,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883406130] [2019-11-24 05:16:25,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:25,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883406130] [2019-11-24 05:16:25,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223500711] [2019-11-24 05:16:25,913 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 05:16:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:26,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:16:26,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:16:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:26,579 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:16:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:26,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478936908] [2019-11-24 05:16:26,797 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-24 05:16:26,798 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:16:26,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:16:26,814 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:16:26,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs