/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_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:42:01,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:42:01,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:42:01,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:42:01,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:42:01,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:42:01,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:42:01,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:42:01,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:42:01,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:42:01,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:42:01,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:42:01,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:42:01,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:42:01,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:42:01,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:42:01,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:42:01,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:42:01,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:42:01,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:42:01,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:42:01,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:42:01,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:42:01,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:42:01,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:42:01,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:42:01,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:42:01,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:42:01,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:42:01,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:42:01,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:42:01,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:42:01,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:42:01,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:42:01,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:42:01,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:42:01,401 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 04:42:01,423 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:42:01,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:42:01,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:42:01,425 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:42:01,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:42:01,425 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:42:01,426 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:42:01,426 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:42:01,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:42:01,426 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:42:01,427 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:42:01,428 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:42:01,428 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:42:01,428 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:42:01,428 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:42:01,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:42:01,430 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:42:01,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:42:01,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:42:01,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:42:01,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:42:01,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:42:01,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:42:01,432 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:42:01,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:42:01,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:42:01,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:42:01,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:42:01,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:42:01,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:42:01,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:42:01,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:42:01,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:42:01,435 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:42:01,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:42:01,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:42:01,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:42:01,436 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:42:01,701 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:42:01,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:42:01,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:42:01,722 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:42:01,722 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:42:01,723 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product22.cil.c [2019-11-24 04:42:01,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38e11321d/6ca94b53b37641c781b36989bdb6d07d/FLAG96805d296 [2019-11-24 04:42:02,424 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:42:02,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product22.cil.c [2019-11-24 04:42:02,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38e11321d/6ca94b53b37641c781b36989bdb6d07d/FLAG96805d296 [2019-11-24 04:42:02,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38e11321d/6ca94b53b37641c781b36989bdb6d07d [2019-11-24 04:42:02,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:42:02,646 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:42:02,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:42:02,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:42:02,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:42:02,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:42:02" (1/1) ... [2019-11-24 04:42:02,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a9c6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:02, skipping insertion in model container [2019-11-24 04:42:02,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:42:02" (1/1) ... [2019-11-24 04:42:02,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:42:02,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:42:03,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:42:03,551 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:42:03,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:42:03,824 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:42:03,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03 WrapperNode [2019-11-24 04:42:03,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:42:03,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:42:03,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:42:03,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:42:03,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (1/1) ... [2019-11-24 04:42:03,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (1/1) ... [2019-11-24 04:42:04,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:42:04,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:42:04,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:42:04,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:42:04,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (1/1) ... [2019-11-24 04:42:04,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (1/1) ... [2019-11-24 04:42:04,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (1/1) ... [2019-11-24 04:42:04,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (1/1) ... [2019-11-24 04:42:04,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (1/1) ... [2019-11-24 04:42:04,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (1/1) ... [2019-11-24 04:42:04,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (1/1) ... [2019-11-24 04:42:04,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:42:04,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:42:04,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:42:04,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:42:04,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (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 04:42:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:42:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:42:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:42:04,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:43:01,152 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:43:01,153 INFO L284 CfgBuilder]: Removed 1469 assume(true) statements. [2019-11-24 04:43:01,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:43:01 BoogieIcfgContainer [2019-11-24 04:43:01,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:43:01,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:43:01,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:43:01,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:43:01,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:42:02" (1/3) ... [2019-11-24 04:43:01,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407749f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:43:01, skipping insertion in model container [2019-11-24 04:43:01,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:42:03" (2/3) ... [2019-11-24 04:43:01,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407749f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:43:01, skipping insertion in model container [2019-11-24 04:43:01,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:43:01" (3/3) ... [2019-11-24 04:43:01,162 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2019-11-24 04:43:01,170 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:43:01,179 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-24 04:43:01,188 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-24 04:43:01,227 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:43:01,227 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:43:01,227 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:43:01,227 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:43:01,228 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:43:01,228 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:43:01,228 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:43:01,228 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:43:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states. [2019-11-24 04:43:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:43:01,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:01,290 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:01,290 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 04:43:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:01,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2082191642, now seen corresponding path program 1 times [2019-11-24 04:43:01,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:01,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664670709] [2019-11-24 04:43:01,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:01,707 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 04:43:01,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664670709] [2019-11-24 04:43:01,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:01,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:43:01,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99087316] [2019-11-24 04:43:01,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:43:01,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:01,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:43:01,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:43:01,748 INFO L87 Difference]: Start difference. First operand 2417 states. Second operand 2 states. [2019-11-24 04:43:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:01,892 INFO L93 Difference]: Finished difference Result 2434 states and 4707 transitions. [2019-11-24 04:43:01,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:43:01,894 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-24 04:43:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:01,925 INFO L225 Difference]: With dead ends: 2434 [2019-11-24 04:43:01,925 INFO L226 Difference]: Without dead ends: 2415 [2019-11-24 04:43:01,931 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 04:43:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2019-11-24 04:43:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2415. [2019-11-24 04:43:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2415 states. [2019-11-24 04:43:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4677 transitions. [2019-11-24 04:43:02,070 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4677 transitions. Word has length 12 [2019-11-24 04:43:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:02,070 INFO L462 AbstractCegarLoop]: Abstraction has 2415 states and 4677 transitions. [2019-11-24 04:43:02,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:43:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4677 transitions. [2019-11-24 04:43:02,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:43:02,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:02,074 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:02,075 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 04:43:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash -176625883, now seen corresponding path program 1 times [2019-11-24 04:43:02,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:02,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983707634] [2019-11-24 04:43:02,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:02,211 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 04:43:02,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983707634] [2019-11-24 04:43:02,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:02,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:02,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789393287] [2019-11-24 04:43:02,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:43:02,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:02,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:43:02,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:43:02,218 INFO L87 Difference]: Start difference. First operand 2415 states and 4677 transitions. Second operand 3 states. [2019-11-24 04:43:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:02,718 INFO L93 Difference]: Finished difference Result 4488 states and 8686 transitions. [2019-11-24 04:43:02,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:43:02,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 04:43:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:02,737 INFO L225 Difference]: With dead ends: 4488 [2019-11-24 04:43:02,737 INFO L226 Difference]: Without dead ends: 3260 [2019-11-24 04:43:02,743 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 04:43:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2019-11-24 04:43:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3186. [2019-11-24 04:43:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2019-11-24 04:43:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 6169 transitions. [2019-11-24 04:43:02,828 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 6169 transitions. Word has length 13 [2019-11-24 04:43:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:02,828 INFO L462 AbstractCegarLoop]: Abstraction has 3186 states and 6169 transitions. [2019-11-24 04:43:02,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:43:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 6169 transitions. [2019-11-24 04:43:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:43:02,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:02,831 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:02,831 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 04:43:02,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:02,832 INFO L82 PathProgramCache]: Analyzing trace with hash -341059229, now seen corresponding path program 1 times [2019-11-24 04:43:02,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:02,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472391161] [2019-11-24 04:43:02,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:02,984 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 04:43:02,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472391161] [2019-11-24 04:43:02,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:02,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:02,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654773962] [2019-11-24 04:43:02,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:43:02,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:43:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:43:02,989 INFO L87 Difference]: Start difference. First operand 3186 states and 6169 transitions. Second operand 4 states. [2019-11-24 04:43:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:06,123 INFO L93 Difference]: Finished difference Result 9045 states and 17438 transitions. [2019-11-24 04:43:06,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:43:06,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 04:43:06,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:06,164 INFO L225 Difference]: With dead ends: 9045 [2019-11-24 04:43:06,173 INFO L226 Difference]: Without dead ends: 6342 [2019-11-24 04:43:06,182 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 04:43:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2019-11-24 04:43:06,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 3948. [2019-11-24 04:43:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3948 states. [2019-11-24 04:43:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3948 states to 3948 states and 7273 transitions. [2019-11-24 04:43:06,339 INFO L78 Accepts]: Start accepts. Automaton has 3948 states and 7273 transitions. Word has length 15 [2019-11-24 04:43:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:06,339 INFO L462 AbstractCegarLoop]: Abstraction has 3948 states and 7273 transitions. [2019-11-24 04:43:06,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:43:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3948 states and 7273 transitions. [2019-11-24 04:43:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:43:06,341 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:06,342 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:06,342 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 04:43:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:06,342 INFO L82 PathProgramCache]: Analyzing trace with hash -490863941, now seen corresponding path program 1 times [2019-11-24 04:43:06,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:06,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666639393] [2019-11-24 04:43:06,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:06,442 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 04:43:06,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666639393] [2019-11-24 04:43:06,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:06,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:06,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218936767] [2019-11-24 04:43:06,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:43:06,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:43:06,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:43:06,445 INFO L87 Difference]: Start difference. First operand 3948 states and 7273 transitions. Second operand 4 states. [2019-11-24 04:43:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:08,218 INFO L93 Difference]: Finished difference Result 9463 states and 17522 transitions. [2019-11-24 04:43:08,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:43:08,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-24 04:43:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:08,254 INFO L225 Difference]: With dead ends: 9463 [2019-11-24 04:43:08,254 INFO L226 Difference]: Without dead ends: 6334 [2019-11-24 04:43:08,261 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 04:43:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2019-11-24 04:43:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 3943. [2019-11-24 04:43:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3943 states. [2019-11-24 04:43:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 7256 transitions. [2019-11-24 04:43:08,406 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 7256 transitions. Word has length 16 [2019-11-24 04:43:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:08,407 INFO L462 AbstractCegarLoop]: Abstraction has 3943 states and 7256 transitions. [2019-11-24 04:43:08,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:43:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 7256 transitions. [2019-11-24 04:43:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:43:08,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:08,408 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:08,409 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 04:43:08,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:08,409 INFO L82 PathProgramCache]: Analyzing trace with hash 724451026, now seen corresponding path program 1 times [2019-11-24 04:43:08,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:08,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621458685] [2019-11-24 04:43:08,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:08,476 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 04:43:08,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621458685] [2019-11-24 04:43:08,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:08,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:08,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989409367] [2019-11-24 04:43:08,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:43:08,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:08,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:43:08,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:43:08,478 INFO L87 Difference]: Start difference. First operand 3943 states and 7256 transitions. Second operand 3 states. [2019-11-24 04:43:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:09,000 INFO L93 Difference]: Finished difference Result 8713 states and 16189 transitions. [2019-11-24 04:43:09,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:43:09,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 04:43:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:09,033 INFO L225 Difference]: With dead ends: 8713 [2019-11-24 04:43:09,033 INFO L226 Difference]: Without dead ends: 6413 [2019-11-24 04:43:09,039 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 04:43:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6413 states. [2019-11-24 04:43:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6413 to 5967. [2019-11-24 04:43:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5967 states. [2019-11-24 04:43:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5967 states to 5967 states and 10993 transitions. [2019-11-24 04:43:09,227 INFO L78 Accepts]: Start accepts. Automaton has 5967 states and 10993 transitions. Word has length 16 [2019-11-24 04:43:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:09,227 INFO L462 AbstractCegarLoop]: Abstraction has 5967 states and 10993 transitions. [2019-11-24 04:43:09,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:43:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 5967 states and 10993 transitions. [2019-11-24 04:43:09,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:43:09,229 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:09,229 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 04:43:09,229 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 04:43:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:09,230 INFO L82 PathProgramCache]: Analyzing trace with hash 983183875, now seen corresponding path program 1 times [2019-11-24 04:43:09,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:09,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960552053] [2019-11-24 04:43:09,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:09,297 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 04:43:09,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960552053] [2019-11-24 04:43:09,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:09,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:09,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163318174] [2019-11-24 04:43:09,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:43:09,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:09,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:43:09,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:43:09,299 INFO L87 Difference]: Start difference. First operand 5967 states and 10993 transitions. Second operand 3 states. [2019-11-24 04:43:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:12,113 INFO L93 Difference]: Finished difference Result 10093 states and 18743 transitions. [2019-11-24 04:43:12,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:43:12,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-24 04:43:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:12,129 INFO L225 Difference]: With dead ends: 10093 [2019-11-24 04:43:12,129 INFO L226 Difference]: Without dead ends: 5960 [2019-11-24 04:43:12,137 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 04:43:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2019-11-24 04:43:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 5960. [2019-11-24 04:43:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5960 states. [2019-11-24 04:43:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5960 states to 5960 states and 10976 transitions. [2019-11-24 04:43:12,316 INFO L78 Accepts]: Start accepts. Automaton has 5960 states and 10976 transitions. Word has length 17 [2019-11-24 04:43:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:12,317 INFO L462 AbstractCegarLoop]: Abstraction has 5960 states and 10976 transitions. [2019-11-24 04:43:12,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:43:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states and 10976 transitions. [2019-11-24 04:43:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:43:12,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:12,319 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 04:43:12,319 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash 413967611, now seen corresponding path program 1 times [2019-11-24 04:43:12,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:12,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108952565] [2019-11-24 04:43:12,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:12,384 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 04:43:12,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108952565] [2019-11-24 04:43:12,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:12,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:12,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598325017] [2019-11-24 04:43:12,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:43:12,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:12,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:43:12,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:43:12,387 INFO L87 Difference]: Start difference. First operand 5960 states and 10976 transitions. Second operand 3 states. [2019-11-24 04:43:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:12,949 INFO L93 Difference]: Finished difference Result 15712 states and 29074 transitions. [2019-11-24 04:43:12,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:43:12,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-24 04:43:12,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:12,976 INFO L225 Difference]: With dead ends: 15712 [2019-11-24 04:43:12,977 INFO L226 Difference]: Without dead ends: 10588 [2019-11-24 04:43:12,987 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 04:43:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10588 states. [2019-11-24 04:43:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10588 to 9992. [2019-11-24 04:43:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9992 states. [2019-11-24 04:43:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9992 states to 9992 states and 18413 transitions. [2019-11-24 04:43:13,297 INFO L78 Accepts]: Start accepts. Automaton has 9992 states and 18413 transitions. Word has length 18 [2019-11-24 04:43:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:13,298 INFO L462 AbstractCegarLoop]: Abstraction has 9992 states and 18413 transitions. [2019-11-24 04:43:13,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:43:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states and 18413 transitions. [2019-11-24 04:43:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 04:43:13,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:13,300 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 04:43:13,300 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:13,300 INFO L82 PathProgramCache]: Analyzing trace with hash -51867380, now seen corresponding path program 1 times [2019-11-24 04:43:13,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:13,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337606933] [2019-11-24 04:43:13,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:13,383 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 04:43:13,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337606933] [2019-11-24 04:43:13,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:13,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:13,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649812408] [2019-11-24 04:43:13,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:43:13,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:43:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:43:13,386 INFO L87 Difference]: Start difference. First operand 9992 states and 18413 transitions. Second operand 3 states. [2019-11-24 04:43:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:13,846 INFO L93 Difference]: Finished difference Result 9992 states and 18413 transitions. [2019-11-24 04:43:13,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:43:13,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 04:43:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:13,868 INFO L225 Difference]: With dead ends: 9992 [2019-11-24 04:43:13,868 INFO L226 Difference]: Without dead ends: 9985 [2019-11-24 04:43:13,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:43:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9985 states. [2019-11-24 04:43:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9985 to 9985. [2019-11-24 04:43:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9985 states. [2019-11-24 04:43:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9985 states to 9985 states and 18398 transitions. [2019-11-24 04:43:14,197 INFO L78 Accepts]: Start accepts. Automaton has 9985 states and 18398 transitions. Word has length 19 [2019-11-24 04:43:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:14,198 INFO L462 AbstractCegarLoop]: Abstraction has 9985 states and 18398 transitions. [2019-11-24 04:43:14,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:43:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 9985 states and 18398 transitions. [2019-11-24 04:43:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-24 04:43:14,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:14,204 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:14,205 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:14,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1528059661, now seen corresponding path program 1 times [2019-11-24 04:43:14,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:14,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667022859] [2019-11-24 04:43:14,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:14,365 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 04:43:14,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667022859] [2019-11-24 04:43:14,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:14,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:43:14,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583400536] [2019-11-24 04:43:14,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:43:14,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:14,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:43:14,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:43:14,367 INFO L87 Difference]: Start difference. First operand 9985 states and 18398 transitions. Second operand 4 states. [2019-11-24 04:43:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:15,132 INFO L93 Difference]: Finished difference Result 19182 states and 35373 transitions. [2019-11-24 04:43:15,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:43:15,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-24 04:43:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:15,150 INFO L225 Difference]: With dead ends: 19182 [2019-11-24 04:43:15,150 INFO L226 Difference]: Without dead ends: 9791 [2019-11-24 04:43:15,162 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 04:43:15,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9791 states. [2019-11-24 04:43:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9791 to 9587. [2019-11-24 04:43:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9587 states. [2019-11-24 04:43:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9587 states to 9587 states and 17687 transitions. [2019-11-24 04:43:15,492 INFO L78 Accepts]: Start accepts. Automaton has 9587 states and 17687 transitions. Word has length 32 [2019-11-24 04:43:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:15,492 INFO L462 AbstractCegarLoop]: Abstraction has 9587 states and 17687 transitions. [2019-11-24 04:43:15,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:43:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9587 states and 17687 transitions. [2019-11-24 04:43:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-24 04:43:15,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:15,497 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:15,497 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:15,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1458837831, now seen corresponding path program 1 times [2019-11-24 04:43:15,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:15,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870340350] [2019-11-24 04:43:15,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:43:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:43:15,675 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 04:43:15,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870340350] [2019-11-24 04:43:15,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:43:15,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:43:15,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151437072] [2019-11-24 04:43:15,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:43:15,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:43:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:43:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:43:15,677 INFO L87 Difference]: Start difference. First operand 9587 states and 17687 transitions. Second operand 4 states. [2019-11-24 04:43:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:43:17,364 INFO L93 Difference]: Finished difference Result 19639 states and 36346 transitions. [2019-11-24 04:43:17,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:43:17,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-11-24 04:43:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:43:17,380 INFO L225 Difference]: With dead ends: 19639 [2019-11-24 04:43:17,380 INFO L226 Difference]: Without dead ends: 10510 [2019-11-24 04:43:17,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:43:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10510 states. [2019-11-24 04:43:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10510 to 9587. [2019-11-24 04:43:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9587 states. [2019-11-24 04:43:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9587 states to 9587 states and 17562 transitions. [2019-11-24 04:43:17,768 INFO L78 Accepts]: Start accepts. Automaton has 9587 states and 17562 transitions. Word has length 33 [2019-11-24 04:43:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:43:17,768 INFO L462 AbstractCegarLoop]: Abstraction has 9587 states and 17562 transitions. [2019-11-24 04:43:17,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:43:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 9587 states and 17562 transitions. [2019-11-24 04:43:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-24 04:43:17,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:43:17,773 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:43:17,774 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:43:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:43:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash 488663706, now seen corresponding path program 1 times [2019-11-24 04:43:17,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:43:17,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708410047] [2019-11-24 04:43:17,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY