/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/ldv-validator-v0.8/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:01:13,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:01:13,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:01:13,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:01:13,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:01:13,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:01:13,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:01:13,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:01:13,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:01:13,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:01:13,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:01:13,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:01:13,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:01:13,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:01:13,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:01:13,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:01:13,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:01:13,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:01:13,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:01:13,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:01:13,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:01:13,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:01:13,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:01:13,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:01:13,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:01:13,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:01:13,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:01:13,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:01:13,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:01:13,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:01:13,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:01:13,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:01:13,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:01:13,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:01:13,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:01:13,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:01:13,508 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 04:01:13,542 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:01:13,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:01:13,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:01:13,544 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:01:13,544 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:01:13,544 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:01:13,544 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:01:13,544 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:01:13,545 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:01:13,545 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:01:13,545 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:01:13,545 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:01:13,545 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:01:13,546 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:01:13,546 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:01:13,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:01:13,549 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:01:13,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:01:13,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:01:13,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:01:13,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:01:13,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:01:13,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:01:13,550 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:01:13,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:01:13,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:01:13,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:01:13,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:01:13,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:01:13,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:01:13,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:01:13,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:01:13,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:01:13,552 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:01:13,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:01:13,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:01:13,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:01:13,553 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:01:13,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:01:13,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:01:13,818 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:01:13,820 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:01:13,820 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:01:13,821 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-11-24 04:01:13,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68601a021/3a48946f5e4e40aeb58c7251513bbd0c/FLAGb759759e1 [2019-11-24 04:01:14,603 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:01:14,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-11-24 04:01:14,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68601a021/3a48946f5e4e40aeb58c7251513bbd0c/FLAGb759759e1 [2019-11-24 04:01:14,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68601a021/3a48946f5e4e40aeb58c7251513bbd0c [2019-11-24 04:01:14,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:01:14,727 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:01:14,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:01:14,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:01:14,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:01:14,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:01:14" (1/1) ... [2019-11-24 04:01:14,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d11b488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:14, skipping insertion in model container [2019-11-24 04:01:14,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:01:14" (1/1) ... [2019-11-24 04:01:14,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:01:14,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:01:16,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:01:16,132 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:01:16,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:01:16,594 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:01:16,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16 WrapperNode [2019-11-24 04:01:16,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:01:16,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:01:16,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:01:16,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:01:16,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (1/1) ... [2019-11-24 04:01:16,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (1/1) ... [2019-11-24 04:01:16,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:01:16,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:01:16,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:01:16,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:01:16,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (1/1) ... [2019-11-24 04:01:16,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (1/1) ... [2019-11-24 04:01:16,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (1/1) ... [2019-11-24 04:01:16,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (1/1) ... [2019-11-24 04:01:16,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (1/1) ... [2019-11-24 04:01:16,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (1/1) ... [2019-11-24 04:01:16,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (1/1) ... [2019-11-24 04:01:16,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:01:16,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:01:16,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:01:16,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:01:16,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (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 04:01:17,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:01:17,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:01:17,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:01:17,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:01:17,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:01:17,005 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2019-11-24 04:01:17,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2019-11-24 04:01:17,005 INFO L130 BoogieDeclarations]: Found specification of procedure virtblk_remove [2019-11-24 04:01:17,005 INFO L138 BoogieDeclarations]: Found implementation of procedure virtblk_remove [2019-11-24 04:01:17,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:01:17,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:01:17,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:01:17,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:01:17,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:01:17,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:01:27,214 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:01:27,214 INFO L284 CfgBuilder]: Removed 449 assume(true) statements. [2019-11-24 04:01:27,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:01:27 BoogieIcfgContainer [2019-11-24 04:01:27,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:01:27,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:01:27,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:01:27,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:01:27,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:01:14" (1/3) ... [2019-11-24 04:01:27,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a2b613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:01:27, skipping insertion in model container [2019-11-24 04:01:27,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:01:16" (2/3) ... [2019-11-24 04:01:27,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a2b613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:01:27, skipping insertion in model container [2019-11-24 04:01:27,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:01:27" (3/3) ... [2019-11-24 04:01:27,224 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-11-24 04:01:27,234 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:01:27,242 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:01:27,250 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:01:27,276 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:01:27,276 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:01:27,276 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:01:27,276 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:01:27,276 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:01:27,277 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:01:27,277 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:01:27,277 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:01:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2019-11-24 04:01:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:01:27,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:01:27,306 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:01:27,306 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:01:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:01:27,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1551875181, now seen corresponding path program 1 times [2019-11-24 04:01:27,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:01:27,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986851280] [2019-11-24 04:01:27,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:01:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:01:27,730 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 04:01:27,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986851280] [2019-11-24 04:01:27,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:01:27,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:01:27,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489313690] [2019-11-24 04:01:27,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:01:27,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:01:27,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:01:27,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:01:27,756 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 3 states. [2019-11-24 04:01:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:01:27,878 INFO L93 Difference]: Finished difference Result 377 states and 584 transitions. [2019-11-24 04:01:27,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:01:27,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 04:01:27,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:01:27,894 INFO L225 Difference]: With dead ends: 377 [2019-11-24 04:01:27,895 INFO L226 Difference]: Without dead ends: 202 [2019-11-24 04:01:27,900 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 04:01:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-24 04:01:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-24 04:01:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-24 04:01:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 287 transitions. [2019-11-24 04:01:27,979 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 287 transitions. Word has length 12 [2019-11-24 04:01:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:01:27,980 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 287 transitions. [2019-11-24 04:01:27,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:01:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 287 transitions. [2019-11-24 04:01:27,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:01:27,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:01:27,987 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:01:27,987 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:01:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:01:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1757382753, now seen corresponding path program 1 times [2019-11-24 04:01:27,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:01:27,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123223981] [2019-11-24 04:01:27,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:01:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:01:28,114 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 04:01:28,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123223981] [2019-11-24 04:01:28,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:01:28,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:01:28,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053693985] [2019-11-24 04:01:28,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:01:28,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:01:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:01:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:01:28,117 INFO L87 Difference]: Start difference. First operand 200 states and 287 transitions. Second operand 3 states. [2019-11-24 04:01:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:01:28,191 INFO L93 Difference]: Finished difference Result 565 states and 806 transitions. [2019-11-24 04:01:28,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:01:28,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 04:01:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:01:28,197 INFO L225 Difference]: With dead ends: 565 [2019-11-24 04:01:28,197 INFO L226 Difference]: Without dead ends: 369 [2019-11-24 04:01:28,200 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 04:01:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2019-11-24 04:01:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2019-11-24 04:01:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2019-11-24 04:01:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 522 transitions. [2019-11-24 04:01:28,261 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 522 transitions. Word has length 15 [2019-11-24 04:01:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:01:28,262 INFO L462 AbstractCegarLoop]: Abstraction has 366 states and 522 transitions. [2019-11-24 04:01:28,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:01:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 522 transitions. [2019-11-24 04:01:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:01:28,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:01:28,265 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:01:28,265 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:01:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:01:28,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1631049786, now seen corresponding path program 1 times [2019-11-24 04:01:28,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:01:28,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142457668] [2019-11-24 04:01:28,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:01:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:01:28,387 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 04:01:28,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142457668] [2019-11-24 04:01:28,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:01:28,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:01:28,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659991770] [2019-11-24 04:01:28,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:01:28,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:01:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:01:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:01:28,394 INFO L87 Difference]: Start difference. First operand 366 states and 522 transitions. Second operand 3 states. [2019-11-24 04:01:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:01:28,436 INFO L93 Difference]: Finished difference Result 724 states and 1033 transitions. [2019-11-24 04:01:28,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:01:28,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 04:01:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:01:28,443 INFO L225 Difference]: With dead ends: 724 [2019-11-24 04:01:28,444 INFO L226 Difference]: Without dead ends: 719 [2019-11-24 04:01:28,445 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 04:01:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2019-11-24 04:01:28,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2019-11-24 04:01:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719 states. [2019-11-24 04:01:28,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1023 transitions. [2019-11-24 04:01:28,495 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1023 transitions. Word has length 15 [2019-11-24 04:01:28,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:01:28,496 INFO L462 AbstractCegarLoop]: Abstraction has 719 states and 1023 transitions. [2019-11-24 04:01:28,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:01:28,496 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1023 transitions. [2019-11-24 04:01:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-24 04:01:28,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:01:28,502 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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 04:01:28,502 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:01:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:01:28,502 INFO L82 PathProgramCache]: Analyzing trace with hash -653635655, now seen corresponding path program 1 times [2019-11-24 04:01:28,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:01:28,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149614938] [2019-11-24 04:01:28,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:01:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:01:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 04:01:28,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149614938] [2019-11-24 04:01:28,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:01:28,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:01:28,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714082525] [2019-11-24 04:01:28,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:01:28,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:01:28,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:01:28,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:01:28,884 INFO L87 Difference]: Start difference. First operand 719 states and 1023 transitions. Second operand 3 states. [2019-11-24 04:01:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:01:28,944 INFO L93 Difference]: Finished difference Result 1441 states and 2053 transitions. [2019-11-24 04:01:28,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:01:28,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-24 04:01:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:01:28,951 INFO L225 Difference]: With dead ends: 1441 [2019-11-24 04:01:28,951 INFO L226 Difference]: Without dead ends: 724 [2019-11-24 04:01:28,955 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 04:01:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2019-11-24 04:01:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 724. [2019-11-24 04:01:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2019-11-24 04:01:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1028 transitions. [2019-11-24 04:01:28,995 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1028 transitions. Word has length 37 [2019-11-24 04:01:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:01:28,995 INFO L462 AbstractCegarLoop]: Abstraction has 724 states and 1028 transitions. [2019-11-24 04:01:28,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:01:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1028 transitions. [2019-11-24 04:01:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-24 04:01:28,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:01:28,999 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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 04:01:29,000 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:01:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:01:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1223810832, now seen corresponding path program 1 times [2019-11-24 04:01:29,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:01:29,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828659656] [2019-11-24 04:01:29,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:01:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:01:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-24 04:01:29,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828659656] [2019-11-24 04:01:29,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:01:29,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:01:29,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035669564] [2019-11-24 04:01:29,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:01:29,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:01:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:01:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:01:29,581 INFO L87 Difference]: Start difference. First operand 724 states and 1028 transitions. Second operand 3 states. [2019-11-24 04:01:29,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:01:29,622 INFO L93 Difference]: Finished difference Result 1445 states and 2052 transitions. [2019-11-24 04:01:29,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:01:29,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-24 04:01:29,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:01:29,629 INFO L225 Difference]: With dead ends: 1445 [2019-11-24 04:01:29,629 INFO L226 Difference]: Without dead ends: 725 [2019-11-24 04:01:29,632 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 04:01:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2019-11-24 04:01:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 725. [2019-11-24 04:01:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-11-24 04:01:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1029 transitions. [2019-11-24 04:01:29,669 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1029 transitions. Word has length 40 [2019-11-24 04:01:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:01:29,670 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1029 transitions. [2019-11-24 04:01:29,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:01:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1029 transitions. [2019-11-24 04:01:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-24 04:01:29,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:01:29,676 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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 04:01:29,677 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:01:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:01:29,677 INFO L82 PathProgramCache]: Analyzing trace with hash -62772379, now seen corresponding path program 1 times [2019-11-24 04:01:29,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:01:29,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794033425] [2019-11-24 04:01:29,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:01:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:01:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 04:01:30,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794033425] [2019-11-24 04:01:30,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:01:30,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:01:30,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409958120] [2019-11-24 04:01:30,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:01:30,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:01:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:01:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:01:30,025 INFO L87 Difference]: Start difference. First operand 725 states and 1029 transitions. Second operand 3 states. [2019-11-24 04:01:30,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:01:30,070 INFO L93 Difference]: Finished difference Result 1445 states and 2051 transitions. [2019-11-24 04:01:30,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:01:30,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-11-24 04:01:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:01:30,077 INFO L225 Difference]: With dead ends: 1445 [2019-11-24 04:01:30,078 INFO L226 Difference]: Without dead ends: 726 [2019-11-24 04:01:30,081 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 04:01:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2019-11-24 04:01:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 726. [2019-11-24 04:01:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726 states. [2019-11-24 04:01:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1030 transitions. [2019-11-24 04:01:30,115 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1030 transitions. Word has length 41 [2019-11-24 04:01:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:01:30,115 INFO L462 AbstractCegarLoop]: Abstraction has 726 states and 1030 transitions. [2019-11-24 04:01:30,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:01:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1030 transitions. [2019-11-24 04:01:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-24 04:01:30,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:01:30,118 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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 04:01:30,118 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:01:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:01:30,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1616720708, now seen corresponding path program 1 times [2019-11-24 04:01:30,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:01:30,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521820426] [2019-11-24 04:01:30,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:01:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:01:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 04:01:30,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521820426] [2019-11-24 04:01:30,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330354093] [2019-11-24 04:01:30,401 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 04:01:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:01:31,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-24 04:01:31,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:01:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 04:01:31,400 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:01:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-24 04:01:31,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716030554] [2019-11-24 04:01:31,466 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2019-11-24 04:01:31,466 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:01:31,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:01:31,479 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:01:31,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:01:31,748 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:01:31,870 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 500 [2019-11-24 04:01:33,323 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 513 [2019-11-24 04:01:33,988 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 503 [2019-11-24 04:01:34,428 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 521 [2019-11-24 04:01:34,977 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 519 [2019-11-24 04:01:35,400 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 517 [2019-11-24 04:01:35,657 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 520 [2019-11-24 04:01:36,320 WARN L192 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 610 [2019-11-24 04:01:36,456 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:01:36,853 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 612 [2019-11-24 04:01:37,380 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 610 [2019-11-24 04:01:37,823 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 608 [2019-11-24 04:01:37,992 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:01:38,070 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:01:38,149 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:01:38,549 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 676 [2019-11-24 04:01:39,069 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 674 [2019-11-24 04:01:39,490 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 672 [2019-11-24 04:01:40,071 WARN L192 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 686 [2019-11-24 04:01:41,125 WARN L192 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 717 DAG size of output: 717 [2019-11-24 04:01:41,279 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:01:43,235 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:01:43,310 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:01:44,253 WARN L192 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 719 [2019-11-24 04:01:47,206 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 717 [2019-11-24 04:01:49,855 WARN L192 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 715 [2019-11-24 04:01:50,652 WARN L192 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 733 [2019-11-24 04:01:51,642 WARN L192 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 734 [2019-11-24 04:02:00,014 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:02:00,149 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:02:02,238 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:02:03,049 WARN L192 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 735 [2019-11-24 04:02:11,695 WARN L192 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 733 [2019-11-24 04:02:18,565 WARN L192 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 731 [2019-11-24 04:02:19,737 WARN L192 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 753 DAG size of output: 750 [2019-11-24 04:02:21,134 WARN L192 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 750 DAG size of output: 750 [2019-11-24 04:02:21,323 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:02:32,000 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:02:34,857 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:02:40,034 WARN L192 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 751