/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/elevator_spec2_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:42:03,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:42:03,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:42:03,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:42:03,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:42:03,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:42:03,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:42:03,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:42:03,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:42:03,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:42:03,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:42:03,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:42:03,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:42:03,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:42:03,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:42:03,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:42:03,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:42:03,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:42:03,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:42:03,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:42:03,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:42:03,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:42:03,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:42:03,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:42:04,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:42:04,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:42:04,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:42:04,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:42:04,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:42:04,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:42:04,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:42:04,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:42:04,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:42:04,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:42:04,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:42:04,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:42:04,019 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 04:42:04,044 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:42:04,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:42:04,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:42:04,046 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:42:04,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:42:04,046 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:42:04,046 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:42:04,046 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:42:04,047 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:42:04,047 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:42:04,048 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:42:04,048 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:42:04,048 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:42:04,049 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:42:04,049 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:42:04,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:42:04,051 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:42:04,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:42:04,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:42:04,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:42:04,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:42:04,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:42:04,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:42:04,052 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:42:04,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:42:04,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:42:04,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:42:04,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:42:04,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:42:04,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:42:04,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:42:04,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:42:04,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:42:04,055 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:42:04,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:42:04,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:42:04,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:42:04,057 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:42:04,320 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:42:04,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:42:04,337 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:42:04,339 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:42:04,339 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:42:04,340 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product24.cil.c [2019-11-24 04:42:04,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1fc25011/7bd7213c573d4028a059f2d605ea5e25/FLAGc09e970a6 [2019-11-24 04:42:05,047 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:42:05,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product24.cil.c [2019-11-24 04:42:05,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1fc25011/7bd7213c573d4028a059f2d605ea5e25/FLAGc09e970a6 [2019-11-24 04:42:05,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1fc25011/7bd7213c573d4028a059f2d605ea5e25 [2019-11-24 04:42:05,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:42:05,229 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:42:05,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:42:05,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:42:05,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:42:05,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:42:05" (1/1) ... [2019-11-24 04:42:05,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3f1386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:05, skipping insertion in model container [2019-11-24 04:42:05,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:42:05" (1/1) ... [2019-11-24 04:42:05,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:42:05,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:42:06,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:42:06,064 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:42:06,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:42:06,282 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:42:06,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06 WrapperNode [2019-11-24 04:42:06,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:42:06,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:42:06,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:42:06,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:42:06,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (1/1) ... [2019-11-24 04:42:06,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (1/1) ... [2019-11-24 04:42:06,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:42:06,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:42:06,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:42:06,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:42:06,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (1/1) ... [2019-11-24 04:42:06,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (1/1) ... [2019-11-24 04:42:06,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (1/1) ... [2019-11-24 04:42:06,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (1/1) ... [2019-11-24 04:42:06,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (1/1) ... [2019-11-24 04:42:07,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (1/1) ... [2019-11-24 04:42:07,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (1/1) ... [2019-11-24 04:42:07,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:42:07,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:42:07,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:42:07,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:42:07,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (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 04:42:07,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:42:07,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:42:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:42:07,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:43:13,920 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:43:13,921 INFO L284 CfgBuilder]: Removed 1613 assume(true) statements. [2019-11-24 04:43:13,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:43:13 BoogieIcfgContainer [2019-11-24 04:43:13,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:43:13,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:43:13,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:43:13,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:43:13,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:42:05" (1/3) ... [2019-11-24 04:43:13,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64504423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:43:13, skipping insertion in model container [2019-11-24 04:43:13,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:06" (2/3) ... [2019-11-24 04:43:13,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64504423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:43:13, skipping insertion in model container [2019-11-24 04:43:13,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:43:13" (3/3) ... [2019-11-24 04:43:13,930 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product24.cil.c [2019-11-24 04:43:13,938 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:43:13,948 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-24 04:43:13,956 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-24 04:43:13,996 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:43:13,996 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:43:13,996 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:43:13,996 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:43:13,997 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:43:13,997 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:43:13,997 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:43:13,997 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:43:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states. [2019-11-24 04:43:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:43:14,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:14,062 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:14,062 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:14,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:14,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1867774815, now seen corresponding path program 1 times [2019-11-24 04:43:14,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:14,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073487777] [2019-11-24 04:43:14,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:14,472 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 04:43:14,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073487777] [2019-11-24 04:43:14,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:14,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:43:14,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118136003] [2019-11-24 04:43:14,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:43:14,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:43:14,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:43:14,504 INFO L87 Difference]: Start difference. First operand 2433 states. Second operand 2 states. [2019-11-24 04:43:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:14,642 INFO L93 Difference]: Finished difference Result 2450 states and 4731 transitions. [2019-11-24 04:43:14,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:43:14,644 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-24 04:43:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:14,684 INFO L225 Difference]: With dead ends: 2450 [2019-11-24 04:43:14,684 INFO L226 Difference]: Without dead ends: 2431 [2019-11-24 04:43:14,691 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 04:43:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2019-11-24 04:43:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2431. [2019-11-24 04:43:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2431 states. [2019-11-24 04:43:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 4701 transitions. [2019-11-24 04:43:14,874 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 4701 transitions. Word has length 12 [2019-11-24 04:43:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:14,875 INFO L462 AbstractCegarLoop]: Abstraction has 2431 states and 4701 transitions. [2019-11-24 04:43:14,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:43:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 4701 transitions. [2019-11-24 04:43:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:43:14,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:14,879 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:14,879 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2041395687, now seen corresponding path program 1 times [2019-11-24 04:43:14,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:14,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505219163] [2019-11-24 04:43:14,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:15,044 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 04:43:15,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505219163] [2019-11-24 04:43:15,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:15,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:15,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084663312] [2019-11-24 04:43:15,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:43:15,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:15,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:43:15,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:43:15,049 INFO L87 Difference]: Start difference. First operand 2431 states and 4701 transitions. Second operand 3 states. [2019-11-24 04:43:15,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:15,637 INFO L93 Difference]: Finished difference Result 4520 states and 8734 transitions. [2019-11-24 04:43:15,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:43:15,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 04:43:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:15,665 INFO L225 Difference]: With dead ends: 4520 [2019-11-24 04:43:15,666 INFO L226 Difference]: Without dead ends: 3284 [2019-11-24 04:43:15,678 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 04:43:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2019-11-24 04:43:15,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 3210. [2019-11-24 04:43:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3210 states. [2019-11-24 04:43:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 6205 transitions. [2019-11-24 04:43:15,829 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 6205 transitions. Word has length 13 [2019-11-24 04:43:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:15,829 INFO L462 AbstractCegarLoop]: Abstraction has 3210 states and 6205 transitions. [2019-11-24 04:43:15,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:43:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 6205 transitions. [2019-11-24 04:43:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:43:15,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:15,834 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:15,835 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:15,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:15,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1842809234, now seen corresponding path program 1 times [2019-11-24 04:43:15,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:15,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373206199] [2019-11-24 04:43:15,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:16,016 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 04:43:16,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373206199] [2019-11-24 04:43:16,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:16,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:16,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81364604] [2019-11-24 04:43:16,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:43:16,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:16,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:43:16,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:43:16,020 INFO L87 Difference]: Start difference. First operand 3210 states and 6205 transitions. Second operand 4 states. [2019-11-24 04:43:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:19,383 INFO L93 Difference]: Finished difference Result 9120 states and 17540 transitions. [2019-11-24 04:43:19,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:43:19,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 04:43:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:19,436 INFO L225 Difference]: With dead ends: 9120 [2019-11-24 04:43:19,445 INFO L226 Difference]: Without dead ends: 6394 [2019-11-24 04:43:19,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:43:19,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6394 states. [2019-11-24 04:43:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6394 to 3974. [2019-11-24 04:43:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3974 states. [2019-11-24 04:43:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 7291 transitions. [2019-11-24 04:43:19,696 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 7291 transitions. Word has length 15 [2019-11-24 04:43:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:19,696 INFO L462 AbstractCegarLoop]: Abstraction has 3974 states and 7291 transitions. [2019-11-24 04:43:19,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:43:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 7291 transitions. [2019-11-24 04:43:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:43:19,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:19,700 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:19,701 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1250508539, now seen corresponding path program 1 times [2019-11-24 04:43:19,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:19,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84213324] [2019-11-24 04:43:19,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:19,825 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 04:43:19,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84213324] [2019-11-24 04:43:19,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:19,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:19,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111770697] [2019-11-24 04:43:19,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:43:19,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:19,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:43:19,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:43:19,829 INFO L87 Difference]: Start difference. First operand 3974 states and 7291 transitions. Second operand 3 states. [2019-11-24 04:43:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:20,918 INFO L93 Difference]: Finished difference Result 8796 states and 16298 transitions. [2019-11-24 04:43:20,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:43:20,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-24 04:43:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:20,958 INFO L225 Difference]: With dead ends: 8796 [2019-11-24 04:43:20,958 INFO L226 Difference]: Without dead ends: 6468 [2019-11-24 04:43:20,962 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 04:43:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2019-11-24 04:43:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 6022. [2019-11-24 04:43:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6022 states. [2019-11-24 04:43:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 11059 transitions. [2019-11-24 04:43:21,173 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 11059 transitions. Word has length 17 [2019-11-24 04:43:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:21,173 INFO L462 AbstractCegarLoop]: Abstraction has 6022 states and 11059 transitions. [2019-11-24 04:43:21,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:43:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 11059 transitions. [2019-11-24 04:43:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:43:21,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:21,176 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:21,177 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:21,177 INFO L82 PathProgramCache]: Analyzing trace with hash 111098478, now seen corresponding path program 1 times [2019-11-24 04:43:21,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:21,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65334968] [2019-11-24 04:43:21,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:21,288 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 04:43:21,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65334968] [2019-11-24 04:43:21,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:21,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:21,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964365765] [2019-11-24 04:43:21,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:43:21,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:21,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:43:21,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:43:21,290 INFO L87 Difference]: Start difference. First operand 6022 states and 11059 transitions. Second operand 3 states. [2019-11-24 04:43:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:21,795 INFO L93 Difference]: Finished difference Result 10200 states and 18885 transitions. [2019-11-24 04:43:21,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:43:21,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-24 04:43:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:21,827 INFO L225 Difference]: With dead ends: 10200 [2019-11-24 04:43:21,827 INFO L226 Difference]: Without dead ends: 6015 [2019-11-24 04:43:21,835 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 04:43:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2019-11-24 04:43:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 6015. [2019-11-24 04:43:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6015 states. [2019-11-24 04:43:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6015 states to 6015 states and 11042 transitions. [2019-11-24 04:43:22,043 INFO L78 Accepts]: Start accepts. Automaton has 6015 states and 11042 transitions. Word has length 18 [2019-11-24 04:43:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:22,044 INFO L462 AbstractCegarLoop]: Abstraction has 6015 states and 11042 transitions. [2019-11-24 04:43:22,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:43:22,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6015 states and 11042 transitions. [2019-11-24 04:43:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 04:43:22,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:22,047 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 04:43:22,047 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash -850875036, now seen corresponding path program 1 times [2019-11-24 04:43:22,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:22,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737641735] [2019-11-24 04:43:22,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:22,146 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 04:43:22,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737641735] [2019-11-24 04:43:22,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:22,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:22,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245444182] [2019-11-24 04:43:22,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:43:22,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:22,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:43:22,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:43:22,148 INFO L87 Difference]: Start difference. First operand 6015 states and 11042 transitions. Second operand 3 states. [2019-11-24 04:43:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:22,858 INFO L93 Difference]: Finished difference Result 14502 states and 26947 transitions. [2019-11-24 04:43:22,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:43:22,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 04:43:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:22,896 INFO L225 Difference]: With dead ends: 14502 [2019-11-24 04:43:22,896 INFO L226 Difference]: Without dead ends: 10326 [2019-11-24 04:43:22,905 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 04:43:22,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10326 states.