/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_spec14_product03.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:34:18,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:34:18,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:34:18,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:34:18,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:34:18,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:34:18,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:34:18,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:34:18,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:34:18,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:34:18,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:34:18,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:34:18,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:34:18,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:34:18,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:34:18,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:34:18,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:34:18,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:34:18,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:34:18,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:34:18,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:34:18,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:34:18,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:34:18,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:34:18,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 04:34:18,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 04:34:18,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 04:34:18,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 04:34:18,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 04:34:18,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 04:34:18,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:34:18,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:34:18,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:34:18,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:34:18,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:34:18,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:34:18,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:34:18,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:34:18,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:34:18,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:34:18,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:34:18,464 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 04:34:18,480 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:34:18,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:34:18,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:34:18,482 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:34:18,482 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:34:18,482 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:34:18,482 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:34:18,483 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:34:18,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:34:18,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:34:18,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:34:18,483 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:34:18,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:34:18,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:34:18,485 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:34:18,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:34:18,486 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:34:18,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:34:18,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:34:18,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:34:18,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:34:18,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:34:18,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:34:18,487 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:34:18,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:34:18,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:34:18,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:34:18,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:34:18,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:34:18,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:34:18,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:34:18,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:34:18,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:34:18,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:34:18,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:34:18,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:34:18,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:34:18,493 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:34:18,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:34:18,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:34:18,801 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:34:18,804 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:34:18,805 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:34:18,805 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product03.cil.c [2019-11-24 04:34:18,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cde64879/774796d1e1584c878cda02eee48a09fc/FLAG9eeaab55a [2019-11-24 04:34:19,542 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:34:19,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product03.cil.c [2019-11-24 04:34:19,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cde64879/774796d1e1584c878cda02eee48a09fc/FLAG9eeaab55a [2019-11-24 04:34:19,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cde64879/774796d1e1584c878cda02eee48a09fc [2019-11-24 04:34:19,703 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:34:19,705 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:34:19,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:34:19,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:34:19,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:34:19,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:34:19" (1/1) ... [2019-11-24 04:34:19,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6886fec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:19, skipping insertion in model container [2019-11-24 04:34:19,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:34:19" (1/1) ... [2019-11-24 04:34:19,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:34:19,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:34:20,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:34:20,509 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:34:20,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:34:20,734 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:34:20,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20 WrapperNode [2019-11-24 04:34:20,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:34:20,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:34:20,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:34:20,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:34:20,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (1/1) ... [2019-11-24 04:34:20,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (1/1) ... [2019-11-24 04:34:21,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:34:21,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:34:21,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:34:21,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:34:21,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (1/1) ... [2019-11-24 04:34:21,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (1/1) ... [2019-11-24 04:34:21,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (1/1) ... [2019-11-24 04:34:21,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (1/1) ... [2019-11-24 04:34:21,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (1/1) ... [2019-11-24 04:34:21,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (1/1) ... [2019-11-24 04:34:21,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (1/1) ... [2019-11-24 04:34:21,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:34:21,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:34:21,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:34:21,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:34:21,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (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 04:34:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:34:21,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:34:21,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:34:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:35:21,585 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:35:21,585 INFO L284 CfgBuilder]: Removed 1143 assume(true) statements. [2019-11-24 04:35:21,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:35:21 BoogieIcfgContainer [2019-11-24 04:35:21,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:35:21,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:35:21,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:35:21,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:35:21,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:34:19" (1/3) ... [2019-11-24 04:35:21,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3704b210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:35:21, skipping insertion in model container [2019-11-24 04:35:21,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:20" (2/3) ... [2019-11-24 04:35:21,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3704b210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:35:21, skipping insertion in model container [2019-11-24 04:35:21,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:35:21" (3/3) ... [2019-11-24 04:35:21,596 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product03.cil.c [2019-11-24 04:35:21,606 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:35:21,615 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-24 04:35:21,628 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-24 04:35:21,669 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:35:21,669 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:35:21,669 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:35:21,670 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:35:21,670 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:35:21,670 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:35:21,670 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:35:21,671 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:35:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states. [2019-11-24 04:35:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:35:21,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:21,726 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:35:21,727 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 04:35:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash 780890919, now seen corresponding path program 1 times [2019-11-24 04:35:21,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:21,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599650591] [2019-11-24 04:35:21,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:22,556 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 04:35:22,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599650591] [2019-11-24 04:35:22,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:22,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:35:22,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891110425] [2019-11-24 04:35:22,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:35:22,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:22,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:35:22,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:35:22,582 INFO L87 Difference]: Start difference. First operand 1783 states. Second operand 4 states. [2019-11-24 04:35:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:23,584 INFO L93 Difference]: Finished difference Result 3561 states and 6873 transitions. [2019-11-24 04:35:23,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:35:23,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-24 04:35:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:23,641 INFO L225 Difference]: With dead ends: 3561 [2019-11-24 04:35:23,642 INFO L226 Difference]: Without dead ends: 2124 [2019-11-24 04:35:23,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 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 04:35:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2019-11-24 04:35:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1769. [2019-11-24 04:35:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2019-11-24 04:35:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 3413 transitions. [2019-11-24 04:35:23,875 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 3413 transitions. Word has length 11 [2019-11-24 04:35:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:23,876 INFO L462 AbstractCegarLoop]: Abstraction has 1769 states and 3413 transitions. [2019-11-24 04:35:23,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:35:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 3413 transitions. [2019-11-24 04:35:23,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-24 04:35:23,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:23,894 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 04:35:23,895 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 04:35:23,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1705509575, now seen corresponding path program 1 times [2019-11-24 04:35:23,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:23,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556164207] [2019-11-24 04:35:23,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:24,208 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 04:35:24,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556164207] [2019-11-24 04:35:24,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:24,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:35:24,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196630726] [2019-11-24 04:35:24,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:35:24,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:24,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:35:24,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:35:24,212 INFO L87 Difference]: Start difference. First operand 1769 states and 3413 transitions. Second operand 5 states. [2019-11-24 04:35:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:24,798 INFO L93 Difference]: Finished difference Result 2163 states and 4144 transitions. [2019-11-24 04:35:24,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:35:24,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-11-24 04:35:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:24,813 INFO L225 Difference]: With dead ends: 2163 [2019-11-24 04:35:24,813 INFO L226 Difference]: Without dead ends: 2159 [2019-11-24 04:35:24,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:35:24,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2019-11-24 04:35:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 1777. [2019-11-24 04:35:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-11-24 04:35:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 3425 transitions. [2019-11-24 04:35:24,874 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 3425 transitions. Word has length 32 [2019-11-24 04:35:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:24,874 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 3425 transitions. [2019-11-24 04:35:24,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:35:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 3425 transitions. [2019-11-24 04:35:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-24 04:35:24,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:24,880 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:35:24,880 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 04:35:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:24,881 INFO L82 PathProgramCache]: Analyzing trace with hash -659069131, now seen corresponding path program 1 times [2019-11-24 04:35:24,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:24,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718890539] [2019-11-24 04:35:24,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:25,114 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 04:35:25,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718890539] [2019-11-24 04:35:25,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:25,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:35:25,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87615641] [2019-11-24 04:35:25,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:35:25,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:25,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:35:25,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:35:25,117 INFO L87 Difference]: Start difference. First operand 1777 states and 3425 transitions. Second operand 3 states. [2019-11-24 04:35:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:28,637 INFO L93 Difference]: Finished difference Result 3838 states and 7346 transitions. [2019-11-24 04:35:28,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:35:28,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2019-11-24 04:35:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:28,660 INFO L225 Difference]: With dead ends: 3838 [2019-11-24 04:35:28,668 INFO L226 Difference]: Without dead ends: 2241 [2019-11-24 04:35:28,674 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 04:35:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2019-11-24 04:35:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1677. [2019-11-24 04:35:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2019-11-24 04:35:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 3175 transitions. [2019-11-24 04:35:28,785 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 3175 transitions. Word has length 47 [2019-11-24 04:35:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:28,787 INFO L462 AbstractCegarLoop]: Abstraction has 1677 states and 3175 transitions. [2019-11-24 04:35:28,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:35:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 3175 transitions. [2019-11-24 04:35:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-24 04:35:28,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:28,798 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:35:28,798 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 04:35:28,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash 745257748, now seen corresponding path program 1 times [2019-11-24 04:35:28,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:28,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908908628] [2019-11-24 04:35:28,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:29,575 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 04:35:29,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908908628] [2019-11-24 04:35:29,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:29,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:35:29,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114627322] [2019-11-24 04:35:29,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:35:29,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:29,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:35:29,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:35:29,577 INFO L87 Difference]: Start difference. First operand 1677 states and 3175 transitions. Second operand 3 states. [2019-11-24 04:35:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:32,156 INFO L93 Difference]: Finished difference Result 3636 states and 6859 transitions. [2019-11-24 04:35:32,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:35:32,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-11-24 04:35:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:32,171 INFO L225 Difference]: With dead ends: 3636 [2019-11-24 04:35:32,171 INFO L226 Difference]: Without dead ends: 2161 [2019-11-24 04:35:32,175 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 04:35:32,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2019-11-24 04:35:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1602. [2019-11-24 04:35:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1602 states. [2019-11-24 04:35:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2950 transitions. [2019-11-24 04:35:32,236 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2950 transitions. Word has length 48 [2019-11-24 04:35:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:32,236 INFO L462 AbstractCegarLoop]: Abstraction has 1602 states and 2950 transitions. [2019-11-24 04:35:32,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:35:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2950 transitions. [2019-11-24 04:35:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-24 04:35:32,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:32,240 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:35:32,241 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 04:35:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:32,241 INFO L82 PathProgramCache]: Analyzing trace with hash 14018287, now seen corresponding path program 1 times [2019-11-24 04:35:32,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:32,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374323259] [2019-11-24 04:35:32,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:32,531 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 04:35:32,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374323259] [2019-11-24 04:35:32,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:32,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:35:32,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251414984] [2019-11-24 04:35:32,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:35:32,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:32,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:35:32,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:35:32,534 INFO L87 Difference]: Start difference. First operand 1602 states and 2950 transitions. Second operand 3 states. [2019-11-24 04:35:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:34,652 INFO L93 Difference]: Finished difference Result 3479 states and 6417 transitions. [2019-11-24 04:35:34,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:35:34,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2019-11-24 04:35:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:34,664 INFO L225 Difference]: With dead ends: 3479 [2019-11-24 04:35:34,665 INFO L226 Difference]: Without dead ends: 2106 [2019-11-24 04:35:34,668 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 04:35:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-24 04:35:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1552. [2019-11-24 04:35:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1552 states. [2019-11-24 04:35:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2750 transitions. [2019-11-24 04:35:34,729 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2750 transitions. Word has length 50 [2019-11-24 04:35:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:34,730 INFO L462 AbstractCegarLoop]: Abstraction has 1552 states and 2750 transitions. [2019-11-24 04:35:34,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:35:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2750 transitions. [2019-11-24 04:35:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-24 04:35:34,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:34,734 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:35:34,734 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 04:35:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1015322379, now seen corresponding path program 1 times [2019-11-24 04:35:34,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:34,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921362704] [2019-11-24 04:35:34,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:34,982 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 04:35:34,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921362704] [2019-11-24 04:35:34,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:34,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:35:34,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290769250] [2019-11-24 04:35:34,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:35:34,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:34,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:35:34,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:35:34,984 INFO L87 Difference]: Start difference. First operand 1552 states and 2750 transitions. Second operand 3 states. [2019-11-24 04:35:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:37,017 INFO L93 Difference]: Finished difference Result 3367 states and 6020 transitions. [2019-11-24 04:35:37,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:35:37,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-11-24 04:35:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:37,034 INFO L225 Difference]: With dead ends: 3367 [2019-11-24 04:35:37,035 INFO L226 Difference]: Without dead ends: 2076 [2019-11-24 04:35:37,038 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 04:35:37,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2019-11-24 04:35:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1527. [2019-11-24 04:35:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2019-11-24 04:35:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2575 transitions. [2019-11-24 04:35:37,103 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2575 transitions. Word has length 53 [2019-11-24 04:35:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:37,104 INFO L462 AbstractCegarLoop]: Abstraction has 1527 states and 2575 transitions. [2019-11-24 04:35:37,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:35:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2575 transitions. [2019-11-24 04:35:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-24 04:35:37,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:37,108 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:35:37,108 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 04:35:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1381032895, now seen corresponding path program 1 times [2019-11-24 04:35:37,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:37,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53915356] [2019-11-24 04:35:37,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY