/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/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:18:47,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:18:47,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:18:47,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:18:47,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:18:47,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:18:47,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:18:47,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:18:47,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:18:47,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:18:47,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:18:47,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:18:47,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:18:47,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:18:47,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:18:47,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:18:47,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:18:47,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:18:47,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:18:47,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:18:47,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:18:47,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:18:47,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:18:47,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:18:47,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:18:47,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:18:47,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:18:47,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:18:47,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:18:47,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:18:47,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:18:47,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:18:47,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:18:47,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:18:47,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:18:47,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:18:47,082 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 04:18:47,098 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:18:47,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:18:47,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:18:47,099 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:18:47,099 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:18:47,099 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:18:47,100 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:18:47,100 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:18:47,100 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:18:47,100 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:18:47,100 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:18:47,101 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:18:47,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:18:47,101 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:18:47,101 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:18:47,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:18:47,102 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:18:47,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:18:47,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:18:47,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:18:47,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:18:47,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:18:47,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:18:47,103 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:18:47,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:18:47,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:18:47,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:18:47,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:18:47,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:18:47,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:18:47,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:18:47,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:18:47,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:18:47,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:18:47,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:18:47,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:18:47,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:18:47,106 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:18:47,400 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:18:47,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:18:47,424 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:18:47,425 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:18:47,426 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:18:47,426 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2019-11-24 04:18:47,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8becca1ef/be6f28f8a25749699f597f0f43305684/FLAGd3ec74442 [2019-11-24 04:18:47,948 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:18:47,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2019-11-24 04:18:47,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8becca1ef/be6f28f8a25749699f597f0f43305684/FLAGd3ec74442 [2019-11-24 04:18:48,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8becca1ef/be6f28f8a25749699f597f0f43305684 [2019-11-24 04:18:48,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:18:48,352 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:18:48,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:18:48,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:18:48,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:18:48,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9c65c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48, skipping insertion in model container [2019-11-24 04:18:48,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:18:48,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:18:48,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:18:48,570 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:18:48,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:18:48,605 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:18:48,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48 WrapperNode [2019-11-24 04:18:48,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:18:48,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:18:48,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:18:48,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:18:48,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:18:48,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:18:48,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:18:48,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:18:48,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (1/1) ... [2019-11-24 04:18:48,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:18:48,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:18:48,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:18:48,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:18:48,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (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 04:18:48,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:18:48,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:18:49,247 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:18:49,248 INFO L284 CfgBuilder]: Removed 38 assume(true) statements. [2019-11-24 04:18:49,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:18:49 BoogieIcfgContainer [2019-11-24 04:18:49,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:18:49,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:18:49,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:18:49,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:18:49,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:18:48" (1/3) ... [2019-11-24 04:18:49,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9d75c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:18:49, skipping insertion in model container [2019-11-24 04:18:49,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:48" (2/3) ... [2019-11-24 04:18:49,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9d75c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:18:49, skipping insertion in model container [2019-11-24 04:18:49,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:18:49" (3/3) ... [2019-11-24 04:18:49,257 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2019-11-24 04:18:49,267 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:18:49,273 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2019-11-24 04:18:49,285 INFO L249 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2019-11-24 04:18:49,316 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:18:49,316 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:18:49,316 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:18:49,316 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:18:49,317 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:18:49,317 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:18:49,317 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:18:49,317 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:18:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2019-11-24 04:18:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:18:49,341 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:18:49,341 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:18:49,342 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:18:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:18:49,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1149386529, now seen corresponding path program 1 times [2019-11-24 04:18:49,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:18:49,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895176816] [2019-11-24 04:18:49,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:18:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:49,510 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 04:18:49,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895176816] [2019-11-24 04:18:49,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:18:49,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:18:49,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425863170] [2019-11-24 04:18:49,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:18:49,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:18:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:18:49,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:18:49,530 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 4 states. [2019-11-24 04:18:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:18:49,782 INFO L93 Difference]: Finished difference Result 140 states and 191 transitions. [2019-11-24 04:18:49,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:18:49,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-24 04:18:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:18:49,795 INFO L225 Difference]: With dead ends: 140 [2019-11-24 04:18:49,796 INFO L226 Difference]: Without dead ends: 62 [2019-11-24 04:18:49,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:18:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-24 04:18:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-24 04:18:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 04:18:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2019-11-24 04:18:49,867 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 6 [2019-11-24 04:18:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:18:49,868 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2019-11-24 04:18:49,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:18:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2019-11-24 04:18:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:18:49,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:18:49,870 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:18:49,871 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:18:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:18:49,872 INFO L82 PathProgramCache]: Analyzing trace with hash 754015108, now seen corresponding path program 1 times [2019-11-24 04:18:49,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:18:49,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138137991] [2019-11-24 04:18:49,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:18:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:49,924 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 04:18:49,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138137991] [2019-11-24 04:18:49,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:18:49,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:18:49,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513726629] [2019-11-24 04:18:49,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:18:49,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:18:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:18:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:18:49,928 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 4 states. [2019-11-24 04:18:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:18:50,080 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2019-11-24 04:18:50,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:18:50,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 04:18:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:18:50,084 INFO L225 Difference]: With dead ends: 74 [2019-11-24 04:18:50,084 INFO L226 Difference]: Without dead ends: 55 [2019-11-24 04:18:50,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:18:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-24 04:18:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-11-24 04:18:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-24 04:18:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-24 04:18:50,096 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 8 [2019-11-24 04:18:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:18:50,097 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-24 04:18:50,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:18:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-24 04:18:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:18:50,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:18:50,098 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-24 04:18:50,099 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:18:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:18:50,099 INFO L82 PathProgramCache]: Analyzing trace with hash 186409915, now seen corresponding path program 1 times [2019-11-24 04:18:50,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:18:50,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016543560] [2019-11-24 04:18:50,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:18:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:18:50,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016543560] [2019-11-24 04:18:50,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357806277] [2019-11-24 04:18:50,211 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 04:18:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:50,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-24 04:18:50,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:18:50,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:18:50,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:18:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:50,473 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:18:50,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:18:50,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:18:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:50,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376474293] [2019-11-24 04:18:50,586 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-24 04:18:50,586 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:18:50,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:18:50,600 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:18:50,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:18:51,631 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 210 [2019-11-24 04:18:51,827 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 208 [2019-11-24 04:18:52,133 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-24 04:18:52,459 WARN L192 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-24 04:18:52,869 WARN L192 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 377 [2019-11-24 04:18:53,280 WARN L192 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 362 [2019-11-24 04:18:53,624 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 346 [2019-11-24 04:18:53,903 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 343 [2019-11-24 04:18:54,386 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 464 [2019-11-24 04:18:54,889 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 461 [2019-11-24 04:18:55,308 WARN L192 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 462 [2019-11-24 04:18:55,607 WARN L192 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 462 [2019-11-24 04:18:56,045 WARN L192 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 465 [2019-11-24 04:18:56,354 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 466 [2019-11-24 04:18:57,109 WARN L192 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 649 [2019-11-24 04:18:58,041 WARN L192 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 647 [2019-11-24 04:18:59,112 WARN L192 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 889 DAG size of output: 877 [2019-11-24 04:19:00,237 WARN L192 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 869 DAG size of output: 866 [2019-11-24 04:19:02,181 WARN L192 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 1193 DAG size of output: 1173 [2019-11-24 04:19:04,058 WARN L192 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 1162 DAG size of output: 1161 [2019-11-24 04:19:07,297 WARN L192 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 1532 DAG size of output: 1512 [2019-11-24 04:19:10,557 WARN L192 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 1496 DAG size of output: 1495 [2019-11-24 04:19:15,564 WARN L192 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 1915 DAG size of output: 1906 [2019-11-24 04:19:20,849 WARN L192 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 1889 DAG size of output: 1886 [2019-11-24 04:19:27,054 WARN L192 SmtUtils]: Spent 5.72 s on a formula simplification that was a NOOP. DAG size: 1887 [2019-11-24 04:19:32,600 WARN L192 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 1888 DAG size of output: 1864 [2019-11-24 04:19:38,070 WARN L192 SmtUtils]: Spent 5.00 s on a formula simplification. DAG size of input: 1845 DAG size of output: 1843 [2019-11-24 04:19:43,271 WARN L192 SmtUtils]: Spent 5.19 s on a formula simplification. DAG size of input: 1843 DAG size of output: 1843 [2019-11-24 04:19:52,463 WARN L192 SmtUtils]: Spent 9.00 s on a formula simplification. DAG size of input: 2351 DAG size of output: 2338 [2019-11-24 04:20:00,930 WARN L192 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 2320 DAG size of output: 2319 [2019-11-24 04:20:15,056 WARN L192 SmtUtils]: Spent 13.90 s on a formula simplification. DAG size of input: 3028 DAG size of output: 3012 [2019-11-24 04:20:29,202 WARN L192 SmtUtils]: Spent 13.60 s on a formula simplification. DAG size of input: 3008 DAG size of output: 3007