/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/list-simple/dll2n_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:08:54,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:08:54,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:08:54,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:08:54,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:08:54,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:08:54,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:08:54,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:08:54,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:08:54,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:08:54,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:08:54,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:08:54,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:08:54,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:08:54,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:08:54,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:08:54,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:08:54,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:08:54,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:08:54,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:08:54,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:08:54,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:08:54,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:08:54,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:08:54,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 04:08:54,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 04:08:54,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 04:08:54,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 04:08:54,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 04:08:54,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 04:08:54,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:08:54,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:08:54,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:08:54,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:08:54,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:08:54,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:08:54,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:08:54,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:08:54,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:08:54,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:08:54,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:08:54,292 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 04:08:54,307 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:08:54,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:08:54,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:08:54,308 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:08:54,308 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:08:54,309 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:08:54,309 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:08:54,309 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:08:54,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:08:54,310 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:08:54,310 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:08:54,310 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:08:54,310 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:08:54,310 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:08:54,311 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:08:54,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:08:54,311 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:08:54,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:08:54,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:08:54,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:08:54,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:08:54,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:08:54,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:08:54,313 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:08:54,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:08:54,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:08:54,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:08:54,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:08:54,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:08:54,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:08:54,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:08:54,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:08:54,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:08:54,315 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:08:54,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:08:54,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:08:54,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:08:54,315 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:08:54,573 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:08:54,593 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:08:54,596 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:08:54,598 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:08:54,599 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:08:54,599 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2019-11-24 04:08:54,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9038df980/96d56a7450234219b69074c1786d7111/FLAG3cfabf41a [2019-11-24 04:08:55,251 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:08:55,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2019-11-24 04:08:55,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9038df980/96d56a7450234219b69074c1786d7111/FLAG3cfabf41a [2019-11-24 04:08:55,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9038df980/96d56a7450234219b69074c1786d7111 [2019-11-24 04:08:55,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:08:55,564 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:08:55,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:08:55,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:08:55,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:08:55,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:08:55" (1/1) ... [2019-11-24 04:08:55,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b7df2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:55, skipping insertion in model container [2019-11-24 04:08:55,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:08:55" (1/1) ... [2019-11-24 04:08:55,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:08:55,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:08:56,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:08:56,055 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:08:56,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:08:56,181 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:08:56,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56 WrapperNode [2019-11-24 04:08:56,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:08:56,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:08:56,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:08:56,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:08:56,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (1/1) ... [2019-11-24 04:08:56,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (1/1) ... [2019-11-24 04:08:56,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:08:56,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:08:56,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:08:56,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:08:56,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (1/1) ... [2019-11-24 04:08:56,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (1/1) ... [2019-11-24 04:08:56,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (1/1) ... [2019-11-24 04:08:56,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (1/1) ... [2019-11-24 04:08:56,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (1/1) ... [2019-11-24 04:08:56,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (1/1) ... [2019-11-24 04:08:56,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (1/1) ... [2019-11-24 04:08:56,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:08:56,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:08:56,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:08:56,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:08:56,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (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 04:08:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:08:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:08:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:08:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:08:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:08:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:08:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 04:08:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:08:56,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:08:56,883 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:08:56,883 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-24 04:08:56,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:08:56 BoogieIcfgContainer [2019-11-24 04:08:56,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:08:56,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:08:56,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:08:56,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:08:56,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:08:55" (1/3) ... [2019-11-24 04:08:56,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732018ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:08:56, skipping insertion in model container [2019-11-24 04:08:56,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:08:56" (2/3) ... [2019-11-24 04:08:56,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732018ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:08:56, skipping insertion in model container [2019-11-24 04:08:56,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:08:56" (3/3) ... [2019-11-24 04:08:56,895 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2019-11-24 04:08:56,902 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:08:56,908 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:08:56,917 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:08:56,940 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:08:56,941 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:08:56,941 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:08:56,941 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:08:56,941 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:08:56,941 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:08:56,941 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:08:56,942 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:08:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-24 04:08:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:08:56,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:56,961 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:08:56,961 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash 92759470, now seen corresponding path program 1 times [2019-11-24 04:08:56,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:56,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643144254] [2019-11-24 04:08:56,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:57,135 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 04:08:57,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643144254] [2019-11-24 04:08:57,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:08:57,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:08:57,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140822206] [2019-11-24 04:08:57,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:08:57,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:08:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:08:57,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:08:57,155 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-24 04:08:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:08:57,201 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2019-11-24 04:08:57,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:08:57,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-24 04:08:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:08:57,211 INFO L225 Difference]: With dead ends: 19 [2019-11-24 04:08:57,211 INFO L226 Difference]: Without dead ends: 9 [2019-11-24 04:08:57,214 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 04:08:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-24 04:08:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2019-11-24 04:08:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-24 04:08:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-24 04:08:57,243 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-24 04:08:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:08:57,244 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-24 04:08:57,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:08:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-24 04:08:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:08:57,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:57,244 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:57,245 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1463377487, now seen corresponding path program 1 times [2019-11-24 04:08:57,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:57,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143531093] [2019-11-24 04:08:57,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:08:57,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143531093] [2019-11-24 04:08:57,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:08:57,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:08:57,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927968321] [2019-11-24 04:08:57,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:08:57,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:08:57,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:08:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:08:57,326 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-11-24 04:08:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:08:57,368 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-11-24 04:08:57,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:08:57,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-24 04:08:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:08:57,370 INFO L225 Difference]: With dead ends: 12 [2019-11-24 04:08:57,370 INFO L226 Difference]: Without dead ends: 9 [2019-11-24 04:08:57,373 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:08:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-24 04:08:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-24 04:08:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:08:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-24 04:08:57,378 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2019-11-24 04:08:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:08:57,379 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-24 04:08:57,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:08:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-24 04:08:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:08:57,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:08:57,381 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:08:57,381 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:08:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:08:57,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1879974740, now seen corresponding path program 1 times [2019-11-24 04:08:57,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:08:57,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509529599] [2019-11-24 04:08:57,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:08:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:08:57,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509529599] [2019-11-24 04:08:57,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514114292] [2019-11-24 04:08:57,540 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 04:08:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:08:57,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:08:57,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:08:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:08:57,691 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:08:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:08:57,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224987073] [2019-11-24 04:08:57,743 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-24 04:08:57,743 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:08:57,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:08:57,756 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:08:57,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:08:58,012 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:58,454 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:59,184 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:59,806 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:08:59,912 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:00,343 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:01,188 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:01,316 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 459 [2019-11-24 04:09:01,348 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:01,382 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:01,488 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 401 [2019-11-24 04:09:01,535 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:01,646 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:01,670 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:01,966 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:02,022 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:02,503 WARN L192 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2019-11-24 04:09:02,654 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-11-24 04:09:03,790 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-11-24 04:09:05,884 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 369 [2019-11-24 04:09:06,239 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2019-11-24 04:09:06,263 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:06,293 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:06,322 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:06,430 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2019-11-24 04:09:06,456 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:06,477 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:06,498 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:06,534 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:07,234 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:09:08,142 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2019-11-24 04:09:08,610 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2019-11-24 04:09:08,794 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2019-11-24 04:09:09,270 WARN L192 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2019-11-24 04:09:20,409 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-11-24 04:09:20,449 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-11-24 04:09:20,487 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-11-24 04:09:20,992 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-11-24 04:09:21,023 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-11-24 04:09:21,043 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-11-24 04:09:30,370 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= 0 (select |#valid| (select (select v_prenex_74 ULTIMATE.start_dll_remove_first_~head.base) ULTIMATE.start_dll_remove_first_~head.offset))) [2019-11-24 04:09:32,378 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= 0 (select |#valid| (select (select v_prenex_74 ULTIMATE.start_dll_remove_first_~head.base) ULTIMATE.start_dll_remove_first_~head.offset))) [2019-11-24 04:10:07,588 WARN L192 SmtUtils]: Spent 35.18 s on a formula simplification. DAG size of input: 2207 DAG size of output: 1491 [2019-11-24 04:10:12,525 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= 0 (select |#valid| (select (select (store v_prenex_50 ULTIMATE.start_dll_remove_first_~temp~1.base (store (select v_prenex_50 ULTIMATE.start_dll_remove_first_~temp~1.base) (+ ULTIMATE.start_dll_remove_first_~temp~1.offset 8) 0)) ULTIMATE.start_dll_remove_first_~head.base) ULTIMATE.start_dll_remove_first_~head.offset))) [2019-11-24 04:10:19,987 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= 0 (select |#valid| (select (select (store v_prenex_50 ULTIMATE.start_dll_remove_first_~temp~1.base (store (select v_prenex_50 ULTIMATE.start_dll_remove_first_~temp~1.base) (+ ULTIMATE.start_dll_remove_first_~temp~1.offset 8) 0)) ULTIMATE.start_dll_remove_first_~head.base) ULTIMATE.start_dll_remove_first_~head.offset)))