/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/array-crafted/bAnd2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:51:49,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:51:49,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:51:49,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:51:49,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:51:49,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:51:49,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:51:49,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:51:49,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:51:49,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:51:49,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:51:49,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:51:49,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:51:49,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:51:49,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:51:49,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:51:49,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:51:49,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:51:49,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:51:49,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:51:49,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:51:49,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:51:49,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:51:49,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:51:49,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:51:49,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:51:49,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:51:49,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:51:49,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:51:49,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:51:49,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:51:49,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:51:49,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:51:49,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:51:49,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:51:49,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:51:49,381 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 [2019-11-23 22:51:49,405 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:51:49,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:51:49,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:51:49,407 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:51:49,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:51:49,407 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:51:49,407 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:51:49,407 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:51:49,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:51:49,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:51:49,408 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:51:49,408 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:51:49,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:51:49,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:51:49,409 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:51:49,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:51:49,410 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:51:49,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:51:49,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:51:49,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:51:49,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:51:49,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:51:49,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:51:49,411 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:51:49,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:51:49,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:51:49,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:51:49,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:51:49,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:51:49,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:51:49,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:51:49,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:51:49,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:51:49,413 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:51:49,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:51:49,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:51:49,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:51:49,414 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:51:49,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:51:49,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:51:49,706 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:51:49,707 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:51:49,708 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:51:49,708 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd2.i [2019-11-23 22:51:49,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64d784be7/92a5ebeec55a46b9abc99680d1072ae5/FLAG6c4a52814 [2019-11-23 22:51:50,253 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:51:50,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd2.i [2019-11-23 22:51:50,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64d784be7/92a5ebeec55a46b9abc99680d1072ae5/FLAG6c4a52814 [2019-11-23 22:51:50,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64d784be7/92a5ebeec55a46b9abc99680d1072ae5 [2019-11-23 22:51:50,621 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:51:50,623 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:51:50,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:51:50,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:51:50,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:51:50,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:50,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@719623a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50, skipping insertion in model container [2019-11-23 22:51:50,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:50,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:51:50,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:51:50,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:51:50,893 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:51:50,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:51:50,926 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:51:50,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50 WrapperNode [2019-11-23 22:51:50,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:51:50,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:51:50,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:51:50,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:51:50,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:51,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:51,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:51:51,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:51:51,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:51:51,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:51:51,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:51,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:51,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:51,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:51,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:51,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:51,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (1/1) ... [2019-11-23 22:51:51,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:51:51,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:51:51,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:51:51,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:51:51,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (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 [2019-11-23 22:51:51,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:51:51,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:51:51,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:51:51,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:51:51,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:51:51,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:51:51,628 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:51:51,628 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:51:51,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:51:51 BoogieIcfgContainer [2019-11-23 22:51:51,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:51:51,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:51:51,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:51:51,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:51:51,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:51:50" (1/3) ... [2019-11-23 22:51:51,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542388e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:51:51, skipping insertion in model container [2019-11-23 22:51:51,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:50" (2/3) ... [2019-11-23 22:51:51,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542388e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:51:51, skipping insertion in model container [2019-11-23 22:51:51,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:51:51" (3/3) ... [2019-11-23 22:51:51,639 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd2.i [2019-11-23 22:51:51,649 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:51:51,658 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:51:51,670 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:51:51,691 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:51:51,691 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:51:51,691 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:51:51,691 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:51:51,691 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:51:51,691 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:51:51,692 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:51:51,692 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:51:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:51:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:51:51,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:51,712 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:51,712 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash -977729615, now seen corresponding path program 1 times [2019-11-23 22:51:51,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:51,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081800889] [2019-11-23 22:51:51,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:51:51,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081800889] [2019-11-23 22:51:51,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:51:51,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:51:51,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112266770] [2019-11-23 22:51:51,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:51:51,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:51:51,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:51:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:51:51,899 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 22:51:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:51:51,927 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 22:51:51,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:51:51,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:51:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:51:51,939 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:51:51,939 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:51:51,943 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 [2019-11-23 22:51:51,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:51:51,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:51:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:51:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-23 22:51:51,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-23 22:51:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:51:51,977 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-23 22:51:51,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:51:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-23 22:51:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:51:51,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:51,978 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:51,979 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:51,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1165895748, now seen corresponding path program 1 times [2019-11-23 22:51:51,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:51,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832042964] [2019-11-23 22:51:51,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:51:52,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832042964] [2019-11-23 22:51:52,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183445162] [2019-11-23 22:51:52,058 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 [2019-11-23 22:51:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:51:52,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:51:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:51:52,164 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:51:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:51:52,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:51:52,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:51:52,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133303123] [2019-11-23 22:51:52,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:51:52,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:51:52,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:51:52,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,184 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-23 22:51:52,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:51:52,239 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-23 22:51:52,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:51:52,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:51:52,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:51:52,240 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:51:52,240 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:51:52,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:51:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:51:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:51:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 22:51:52,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-23 22:51:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:51:52,247 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 22:51:52,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:51:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 22:51:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:51:52,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:52,248 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:52,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:51:52,452 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1510942468, now seen corresponding path program 1 times [2019-11-23 22:51:52,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:52,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640624449] [2019-11-23 22:51:52,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:51:52,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640624449] [2019-11-23 22:51:52,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070362719] [2019-11-23 22:51:52,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:51:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:51:52,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:51:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:51:52,610 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:51:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:51:52,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:51:52,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:51:52,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578920721] [2019-11-23 22:51:52,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:51:52,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:51:52,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:51:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,622 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-23 22:51:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:51:52,637 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 22:51:52,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:51:52,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:51:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:51:52,638 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:51:52,639 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:51:52,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:51:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:51:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:51:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:51:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 22:51:52,645 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-23 22:51:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:51:52,645 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 22:51:52,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:51:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 22:51:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:51:52,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:51:52,646 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:51:52,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:51:52,848 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:51:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:51:52,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1316778556, now seen corresponding path program 1 times [2019-11-23 22:51:52,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:51:52,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975948353] [2019-11-23 22:51:52,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:51:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:51:52,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975948353] [2019-11-23 22:51:52,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710985137] [2019-11-23 22:51:52,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:51:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:51:52,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:51:52,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:51:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:51:52,976 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:51:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:51:53,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972562920] [2019-11-23 22:51:53,050 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 22:51:53,050 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:51:53,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:51:53,066 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:51:53,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:51:55,357 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 121 [2019-11-23 22:52:29,864 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 267 [2019-11-23 22:52:49,667 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 313 [2019-11-23 22:52:59,061 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 331 [2019-11-23 22:52:59,233 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 323 [2019-11-23 22:52:59,369 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2019-11-23 22:53:06,190 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 22:53:08,628 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 340 [2019-11-23 22:53:11,158 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 342 [2019-11-23 22:53:16,247 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 352 [2019-11-23 22:53:18,752 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 355 [2019-11-23 22:53:21,294 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-11-23 22:53:21,404 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 358