/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/list-ext3-properties/sll_of_sll_nondet_append-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:04:49,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:04:49,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:04:49,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:04:49,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:04:49,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:04:49,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:04:49,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:04:49,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:04:49,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:04:49,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:04:49,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:04:49,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:04:49,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:04:49,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:04:49,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:04:49,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:04:49,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:04:49,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:04:49,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:04:49,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:04:49,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:04:49,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:04:49,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:04:49,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:04:49,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:04:49,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:04:49,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:04:49,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:04:49,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:04:49,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:04:49,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:04:49,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:04:49,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:04:49,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:04:49,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:04:49,563 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 04:04:49,582 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:04:49,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:04:49,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:04:49,583 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:04:49,583 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:04:49,584 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:04:49,584 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:04:49,584 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:04:49,584 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:04:49,584 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:04:49,585 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:04:49,586 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:04:49,586 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:04:49,586 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:04:49,587 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:04:49,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:04:49,588 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:04:49,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:04:49,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:04:49,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:04:49,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:04:49,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:04:49,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:04:49,589 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:04:49,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:04:49,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:04:49,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:04:49,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:04:49,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:04:49,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:04:49,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:04:49,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:04:49,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:04:49,592 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:04:49,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:04:49,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:04:49,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:04:49,593 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:04:49,863 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:04:49,881 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:04:49,884 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:04:49,885 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:04:49,886 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:04:49,886 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-2.i [2019-11-24 04:04:49,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481a0a781/c85294e009de4b5b9278bf46ddef329a/FLAGa64777039 [2019-11-24 04:04:50,533 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:04:50,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-2.i [2019-11-24 04:04:50,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481a0a781/c85294e009de4b5b9278bf46ddef329a/FLAGa64777039 [2019-11-24 04:04:50,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/481a0a781/c85294e009de4b5b9278bf46ddef329a [2019-11-24 04:04:50,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:04:50,859 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:04:50,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:04:50,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:04:50,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:04:50,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:04:50" (1/1) ... [2019-11-24 04:04:50,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d2c937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:50, skipping insertion in model container [2019-11-24 04:04:50,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:04:50" (1/1) ... [2019-11-24 04:04:50,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:04:50,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:04:51,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:04:51,389 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:04:51,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:04:51,498 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:04:51,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51 WrapperNode [2019-11-24 04:04:51,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:04:51,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:04:51,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:04:51,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:04:51,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (1/1) ... [2019-11-24 04:04:51,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (1/1) ... [2019-11-24 04:04:51,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:04:51,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:04:51,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:04:51,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:04:51,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (1/1) ... [2019-11-24 04:04:51,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (1/1) ... [2019-11-24 04:04:51,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (1/1) ... [2019-11-24 04:04:51,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (1/1) ... [2019-11-24 04:04:51,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (1/1) ... [2019-11-24 04:04:51,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (1/1) ... [2019-11-24 04:04:51,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (1/1) ... [2019-11-24 04:04:51,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:04:51,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:04:51,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:04:51,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:04:51,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (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 04:04:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:04:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:04:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:04:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:04:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:04:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:04:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:04:51,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:04:52,421 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:04:52,421 INFO L284 CfgBuilder]: Removed 39 assume(true) statements. [2019-11-24 04:04:52,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:04:52 BoogieIcfgContainer [2019-11-24 04:04:52,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:04:52,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:04:52,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:04:52,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:04:52,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:04:50" (1/3) ... [2019-11-24 04:04:52,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748cc445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:04:52, skipping insertion in model container [2019-11-24 04:04:52,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:04:51" (2/3) ... [2019-11-24 04:04:52,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748cc445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:04:52, skipping insertion in model container [2019-11-24 04:04:52,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:04:52" (3/3) ... [2019-11-24 04:04:52,431 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2019-11-24 04:04:52,441 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:04:52,448 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:04:52,459 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:04:52,486 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:04:52,486 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:04:52,486 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:04:52,486 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:04:52,487 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:04:52,487 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:04:52,487 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:04:52,487 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:04:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-24 04:04:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:04:52,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:04:52,513 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:04:52,514 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:04:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:04:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash -580255454, now seen corresponding path program 1 times [2019-11-24 04:04:52,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:04:52,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897551636] [2019-11-24 04:04:52,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:04:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:04:52,708 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 04:04:52,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897551636] [2019-11-24 04:04:52,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:04:52,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:04:52,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060382463] [2019-11-24 04:04:52,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:04:52,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:04:52,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:04:52,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:04:52,736 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-11-24 04:04:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:04:52,846 INFO L93 Difference]: Finished difference Result 91 states and 146 transitions. [2019-11-24 04:04:52,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:04:52,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-24 04:04:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:04:52,858 INFO L225 Difference]: With dead ends: 91 [2019-11-24 04:04:52,858 INFO L226 Difference]: Without dead ends: 43 [2019-11-24 04:04:52,861 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:04:52,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-24 04:04:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-11-24 04:04:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-24 04:04:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2019-11-24 04:04:52,899 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 9 [2019-11-24 04:04:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:04:52,899 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2019-11-24 04:04:52,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:04:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2019-11-24 04:04:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:04:52,900 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:04:52,900 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:04:52,901 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:04:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:04:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -284473672, now seen corresponding path program 1 times [2019-11-24 04:04:52,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:04:52,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992847233] [2019-11-24 04:04:52,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:04:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:04:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:04:53,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992847233] [2019-11-24 04:04:53,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870771864] [2019-11-24 04:04:53,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:04:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:04:53,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:04:53,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:04:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:04:53,194 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:04:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:04:53,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [922117680] [2019-11-24 04:04:53,282 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-24 04:04:53,282 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:04:53,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:04:53,324 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:04:53,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:04:54,158 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:54,178 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:54,195 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:54,206 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:54,294 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:54,310 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:54,471 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:04:54,971 WARN L192 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2019-11-24 04:04:55,522 WARN L192 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2019-11-24 04:04:56,142 WARN L192 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2019-11-24 04:04:56,445 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2019-11-24 04:04:56,819 WARN L192 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 81 [2019-11-24 04:04:56,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:04:56,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 3, 3] total 14 [2019-11-24 04:04:56,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248840262] [2019-11-24 04:04:56,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 04:04:56,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:04:56,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 04:04:56,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:04:56,847 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand 7 states. [2019-11-24 04:04:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:04:57,109 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2019-11-24 04:04:57,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:04:57,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-24 04:04:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:04:57,113 INFO L225 Difference]: With dead ends: 63 [2019-11-24 04:04:57,113 INFO L226 Difference]: Without dead ends: 48 [2019-11-24 04:04:57,114 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:04:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-24 04:04:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2019-11-24 04:04:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-24 04:04:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 53 transitions. [2019-11-24 04:04:57,123 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 53 transitions. Word has length 13 [2019-11-24 04:04:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:04:57,124 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 53 transitions. [2019-11-24 04:04:57,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-24 04:04:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2019-11-24 04:04:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:04:57,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:04:57,125 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:04:57,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:04:57,331 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:04:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:04:57,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1874240216, now seen corresponding path program 1 times [2019-11-24 04:04:57,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:04:57,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002584980] [2019-11-24 04:04:57,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:04:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:04:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:04:57,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002584980] [2019-11-24 04:04:57,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943660591] [2019-11-24 04:04:57,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:04:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:04:57,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:04:57,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:04:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:04:57,618 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:04:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:04:57,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417459366] [2019-11-24 04:04:57,647 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-24 04:04:57,648 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:04:57,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:04:57,648 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:04:57,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:04:57,929 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:57,941 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:57,953 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:57,982 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:58,078 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:58,246 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:58,462 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:59,025 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:59,282 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:59,546 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2019-11-24 04:04:59,707 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:00,486 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:00,654 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2019-11-24 04:05:00,816 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-24 04:05:00,894 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:00,998 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2019-11-24 04:05:01,142 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 245 [2019-11-24 04:05:01,231 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:01,556 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2019-11-24 04:05:01,676 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:02,387 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:02,688 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:02,830 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2019-11-24 04:05:02,993 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-24 04:05:03,058 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:03,248 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:03,785 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:03,976 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:04,193 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:04,213 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:04,831 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:04,932 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:05,527 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:05,791 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:05:06,095 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2019-11-24 04:05:06,391 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2019-11-24 04:05:06,762 WARN L192 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2019-11-24 04:05:07,084 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2019-11-24 04:05:09,697 WARN L192 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 220 DAG size of output: 149 [2019-11-24 04:05:12,174 WARN L192 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 199 DAG size of output: 143 [2019-11-24 04:05:13,529 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 243 DAG size of output: 154 [2019-11-24 04:05:14,666 WARN L192 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 243 DAG size of output: 156 [2019-11-24 04:05:14,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:05:14,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 3, 3] total 21 [2019-11-24 04:05:14,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735291665] [2019-11-24 04:05:14,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-24 04:05:14,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:05:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-24 04:05:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2019-11-24 04:05:14,787 INFO L87 Difference]: Start difference. First operand 38 states and 53 transitions. Second operand 11 states. [2019-11-24 04:05:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:05:15,629 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2019-11-24 04:05:15,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-24 04:05:15,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-11-24 04:05:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:05:15,632 INFO L225 Difference]: With dead ends: 69 [2019-11-24 04:05:15,632 INFO L226 Difference]: Without dead ends: 55 [2019-11-24 04:05:15,633 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2019-11-24 04:05:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-24 04:05:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2019-11-24 04:05:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-24 04:05:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-24 04:05:15,641 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 15 [2019-11-24 04:05:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:05:15,641 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-24 04:05:15,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-24 04:05:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-24 04:05:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 04:05:15,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:05:15,642 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:05:15,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:05:15,846 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:05:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:05:15,847 INFO L82 PathProgramCache]: Analyzing trace with hash -199853194, now seen corresponding path program 1 times [2019-11-24 04:05:15,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:05:15,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005668308] [2019-11-24 04:05:15,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:05:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:05:15,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005668308] [2019-11-24 04:05:15,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:05:15,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:05:15,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103139352] [2019-11-24 04:05:15,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:05:15,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:05:15,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:05:15,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:05:15,895 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 5 states. [2019-11-24 04:05:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:05:15,987 INFO L93 Difference]: Finished difference Result 95 states and 132 transitions. [2019-11-24 04:05:15,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:05:15,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-24 04:05:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:05:15,989 INFO L225 Difference]: With dead ends: 95 [2019-11-24 04:05:15,989 INFO L226 Difference]: Without dead ends: 65 [2019-11-24 04:05:15,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:05:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-24 04:05:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-11-24 04:05:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 04:05:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2019-11-24 04:05:15,999 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 19 [2019-11-24 04:05:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:05:15,999 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2019-11-24 04:05:15,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:05:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2019-11-24 04:05:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 04:05:16,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:05:16,000 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:05:16,001 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:05:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:05:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash 852190834, now seen corresponding path program 1 times [2019-11-24 04:05:16,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:05:16,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48239342] [2019-11-24 04:05:16,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:05:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:05:16,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48239342] [2019-11-24 04:05:16,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573986047] [2019-11-24 04:05:16,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:05:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:16,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:05:16,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:05:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:05:16,167 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:05:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:05:16,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650285276] [2019-11-24 04:05:16,193 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-24 04:05:16,193 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:05:16,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:05:16,198 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:05:16,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:05:16,409 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:16,420 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:16,445 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:16,455 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:16,514 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:16,604 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:16,720 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:17,070 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:17,297 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:17,620 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:17,861 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-11-24 04:05:18,043 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-11-24 04:05:18,527 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:18,779 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:18,953 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:19,305 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:19,872 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:20,151 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:20,397 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:20,584 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:20,828 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:21,066 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:21,376 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:21,627 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:22,170 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-11-24 04:05:22,339 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-11-24 04:05:22,421 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:22,543 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:23,018 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2019-11-24 04:05:23,035 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:23,382 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:05:23,833 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2019-11-24 04:05:24,341 WARN L192 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2019-11-24 04:05:24,940 WARN L192 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2019-11-24 04:05:25,249 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2019-11-24 04:05:27,904 WARN L192 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 219 DAG size of output: 157 [2019-11-24 04:05:30,332 WARN L192 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 194 DAG size of output: 140 [2019-11-24 04:05:31,604 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 242 DAG size of output: 154 [2019-11-24 04:05:32,789 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 243 DAG size of output: 156 [2019-11-24 04:05:34,328 WARN L192 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 268 DAG size of output: 175 [2019-11-24 04:05:34,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:05:34,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 3, 3] total 20 [2019-11-24 04:05:34,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433007807] [2019-11-24 04:05:34,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-24 04:05:34,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:05:34,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-24 04:05:34,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-11-24 04:05:34,331 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand 12 states. [2019-11-24 04:05:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:05:34,960 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2019-11-24 04:05:34,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-24 04:05:34,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-11-24 04:05:34,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:05:34,964 INFO L225 Difference]: With dead ends: 82 [2019-11-24 04:05:34,964 INFO L226 Difference]: Without dead ends: 72 [2019-11-24 04:05:34,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-11-24 04:05:34,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-24 04:05:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2019-11-24 04:05:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-24 04:05:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2019-11-24 04:05:34,975 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 20 [2019-11-24 04:05:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:05:34,975 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2019-11-24 04:05:34,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-24 04:05:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2019-11-24 04:05:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 04:05:34,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:05:34,976 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] [2019-11-24 04:05:35,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:05:35,180 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:05:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:05:35,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1966530549, now seen corresponding path program 1 times [2019-11-24 04:05:35,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:05:35,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387469025] [2019-11-24 04:05:35,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:05:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:05:35,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387469025] [2019-11-24 04:05:35,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800064182] [2019-11-24 04:05:35,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:05:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:05:35,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:05:35,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:05:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:05:35,338 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:05:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:05:35,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167118636] [2019-11-24 04:05:35,367 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-24 04:05:35,368 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:05:35,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:05:35,369 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:05:35,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:05:35,526 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:35,547 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:35,575 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:35,595 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:35,664 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:35,748 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:35,961 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:36,374 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:36,507 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:36,784 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:37,759 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:37,880 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-11-24 04:05:38,036 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2019-11-24 04:05:38,055 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:38,198 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2019-11-24 04:05:38,329 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2019-11-24 04:05:38,379 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:38,645 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:39,048 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 224 [2019-11-24 04:05:39,104 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:39,379 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-24 04:05:39,654 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2019-11-24 04:05:40,266 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 278 [2019-11-24 04:05:40,287 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:40,793 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:40,957 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2019-11-24 04:05:41,167 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-24 04:05:41,192 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:41,384 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-24 04:05:41,456 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:41,600 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-24 04:05:41,766 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2019-11-24 04:05:41,939 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2019-11-24 04:05:41,959 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:42,108 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2019-11-24 04:05:42,191 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:42,594 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:42,618 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:42,640 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:42,660 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:42,792 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:42,813 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:42,834 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:42,843 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:43,385 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-11-24 04:05:43,531 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-11-24 04:05:43,617 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:44,116 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-24 04:05:44,469 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 327 [2019-11-24 04:05:44,994 WARN L192 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-11-24 04:05:45,739 WARN L192 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-11-24 04:05:45,911 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:46,266 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2019-11-24 04:05:46,993 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 274 [2019-11-24 04:05:47,014 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:05:47,500 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:05:47,941 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2019-11-24 04:05:48,434 WARN L192 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2019-11-24 04:05:49,012 WARN L192 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2019-11-24 04:05:49,315 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2019-11-24 04:05:51,820 WARN L192 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 221 DAG size of output: 151 [2019-11-24 04:05:54,414 WARN L192 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 198 DAG size of output: 140 [2019-11-24 04:05:55,706 WARN L192 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 242 DAG size of output: 154 [2019-11-24 04:05:56,854 WARN L192 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 243 DAG size of output: 156 [2019-11-24 04:06:03,102 WARN L192 SmtUtils]: Spent 5.78 s on a formula simplification. DAG size of input: 355 DAG size of output: 222 [2019-11-24 04:06:07,168 WARN L192 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 362 DAG size of output: 186 [2019-11-24 04:06:07,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:06:07,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 3, 3] total 21 [2019-11-24 04:06:07,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644191042] [2019-11-24 04:06:07,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-24 04:06:07,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:06:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-24 04:06:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-11-24 04:06:07,171 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand 13 states. [2019-11-24 04:06:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:06:07,806 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2019-11-24 04:06:07,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-24 04:06:07,807 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-24 04:06:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:06:07,808 INFO L225 Difference]: With dead ends: 77 [2019-11-24 04:06:07,808 INFO L226 Difference]: Without dead ends: 67 [2019-11-24 04:06:07,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-11-24 04:06:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-24 04:06:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-11-24 04:06:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-24 04:06:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2019-11-24 04:06:07,820 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 21 [2019-11-24 04:06:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:06:07,820 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2019-11-24 04:06:07,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-24 04:06:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2019-11-24 04:06:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 04:06:07,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:06:07,822 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:06:08,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:06:08,025 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:06:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:06:08,026 INFO L82 PathProgramCache]: Analyzing trace with hash -626189887, now seen corresponding path program 1 times [2019-11-24 04:06:08,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:06:08,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57883472] [2019-11-24 04:06:08,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:06:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:06:08,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57883472] [2019-11-24 04:06:08,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232448395] [2019-11-24 04:06:08,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:06:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:08,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-24 04:06:08,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:06:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:06:08,199 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:06:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:06:08,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613285925] [2019-11-24 04:06:08,225 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-24 04:06:08,226 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:06:08,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:06:08,226 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:06:08,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:06:08,313 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:08,367 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:08,451 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:08,783 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:08,910 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:09,155 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:10,019 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:10,152 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2019-11-24 04:06:10,288 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2019-11-24 04:06:10,343 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:10,580 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:10,811 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:11,265 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:12,158 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:12,717 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:12,925 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2019-11-24 04:06:13,124 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2019-11-24 04:06:13,146 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:13,331 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-24 04:06:13,400 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:13,521 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-24 04:06:13,676 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-24 04:06:13,838 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-11-24 04:06:13,913 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,164 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,444 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,465 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,481 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,504 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,522 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,533 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,550 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,647 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:15,052 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-11-24 04:06:15,184 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 270 [2019-11-24 04:06:15,280 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:15,549 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 226 [2019-11-24 04:06:15,703 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2019-11-24 04:06:15,848 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:16,101 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:16,145 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:16,447 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2019-11-24 04:06:16,562 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:16,694 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:16,840 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-11-24 04:06:17,152 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:17,463 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:17,800 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2019-11-24 04:06:18,139 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-24 04:06:18,264 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:18,433 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 417 [2019-11-24 04:06:18,595 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2019-11-24 04:06:18,659 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:18,784 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 407 [2019-11-24 04:06:18,941 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 399 [2019-11-24 04:06:18,962 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:19,111 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2019-11-24 04:06:19,449 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 415 [2019-11-24 04:06:19,615 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:19,755 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-24 04:06:20,139 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-11-24 04:06:20,364 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:20,586 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:21,332 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:21,350 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:21,422 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:21,819 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-24 04:06:22,067 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 73