/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-examples/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:59:45,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:59:45,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:59:45,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:59:45,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:59:45,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:59:45,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:59:45,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:59:45,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:59:45,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:59:45,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:59:45,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:59:45,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:59:45,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:59:45,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:59:45,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:59:45,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:59:45,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:59:45,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:59:45,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:59:45,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:59:45,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:59:45,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:59:45,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:59:45,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 22:59:45,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 22:59:45,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 22:59:45,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 22:59:45,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 22:59:45,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 22:59:45,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:59:45,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:59:45,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:59:45,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:59:45,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:59:45,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:59:45,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:59:45,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:59:45,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:59:45,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:59:45,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:59:45,115 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 22:59:45,130 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:59:45,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:59:45,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:59:45,131 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:59:45,131 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:59:45,132 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:59:45,132 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:59:45,132 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:59:45,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:59:45,132 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:59:45,133 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:59:45,133 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:59:45,133 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:59:45,133 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:59:45,133 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:59:45,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:59:45,134 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:59:45,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:59:45,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:59:45,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:59:45,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:59:45,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:59:45,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:59:45,136 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:59:45,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:59:45,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:59:45,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:59:45,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:59:45,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:59:45,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:59:45,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:59:45,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:59:45,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:59:45,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:59:45,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:59:45,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:59:45,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:59:45,138 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:59:45,400 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:59:45,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:59:45,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:59:45,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:59:45,424 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:59:45,424 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-11-23 22:59:45,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ac9b952/e5254b2280c84d8f8c37d2dc1ad2947d/FLAG39e468c12 [2019-11-23 22:59:45,934 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:59:45,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-11-23 22:59:45,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ac9b952/e5254b2280c84d8f8c37d2dc1ad2947d/FLAG39e468c12 [2019-11-23 22:59:46,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ac9b952/e5254b2280c84d8f8c37d2dc1ad2947d [2019-11-23 22:59:46,348 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:59:46,350 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:59:46,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:46,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:59:46,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:59:46,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f20484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46, skipping insertion in model container [2019-11-23 22:59:46,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:59:46,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:59:46,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:46,644 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:59:46,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:46,786 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:59:46,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46 WrapperNode [2019-11-23 22:59:46,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:46,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:46,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:59:46,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:59:46,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:46,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:59:46,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:59:46,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:59:46,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:59:46,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:59:46,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:59:46,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:59:46,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (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 22:59:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:59:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:59:46,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:59:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:59:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:59:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:59:47,516 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:59:47,516 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-23 22:59:47,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:47 BoogieIcfgContainer [2019-11-23 22:59:47,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:59:47,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:59:47,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:59:47,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:59:47,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:59:46" (1/3) ... [2019-11-23 22:59:47,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387a1302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:47, skipping insertion in model container [2019-11-23 22:59:47,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (2/3) ... [2019-11-23 22:59:47,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387a1302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:47, skipping insertion in model container [2019-11-23 22:59:47,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:47" (3/3) ... [2019-11-23 22:59:47,526 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2019-11-23 22:59:47,536 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:59:47,544 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 22:59:47,557 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 22:59:47,585 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:59:47,586 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:59:47,586 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:59:47,586 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:59:47,587 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:59:47,587 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:59:47,587 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:59:47,587 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:59:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 22:59:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:59:47,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:47,611 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:59:47,611 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:47,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash 987396161, now seen corresponding path program 1 times [2019-11-23 22:59:47,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:47,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717179166] [2019-11-23 22:59:47,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:47,771 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 22:59:47,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717179166] [2019-11-23 22:59:47,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:47,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:59:47,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580751574] [2019-11-23 22:59:47,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:59:47,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:59:47,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:59:47,791 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-23 22:59:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:47,879 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2019-11-23 22:59:47,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:59:47,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 22:59:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:47,894 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:59:47,894 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:59:47,899 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 22:59:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:59:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 20. [2019-11-23 22:59:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:59:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2019-11-23 22:59:47,934 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 6 [2019-11-23 22:59:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:47,934 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2019-11-23 22:59:47,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:59:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2019-11-23 22:59:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:59:47,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:47,935 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:47,936 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:47,936 INFO L82 PathProgramCache]: Analyzing trace with hash 278294635, now seen corresponding path program 1 times [2019-11-23 22:59:47,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:47,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088124617] [2019-11-23 22:59:47,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:47,979 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 22:59:47,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088124617] [2019-11-23 22:59:47,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409158830] [2019-11-23 22:59:47,980 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 22:59:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:48,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:59:48,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:59:48,054 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 22:59:48,054 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:59:48,078 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 22:59:48,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [273005562] [2019-11-23 22:59:48,104 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 22:59:48,104 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:59:48,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:59:48,119 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:59:48,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:00:01,211 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 214 [2019-11-23 23:00:03,812 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 223 [2019-11-23 23:00:03,933 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 222 [2019-11-23 23:00:05,336 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2019-11-23 23:00:05,515 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2019-11-23 23:00:05,671 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2019-11-23 23:00:20,143 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 274 [2019-11-23 23:00:26,706 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 288 [2019-11-23 23:00:28,938 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 291 [2019-11-23 23:00:29,052 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 291 [2019-11-23 23:00:31,137 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 296 [2019-11-23 23:00:31,255 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 292 [2019-11-23 23:00:33,484 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 298 [2019-11-23 23:00:37,842 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 307 [2019-11-23 23:00:40,048 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 313 [2019-11-23 23:00:40,168 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 310 [2019-11-23 23:00:42,402 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 315 [2019-11-23 23:00:42,534 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 313 [2019-11-23 23:00:42,763 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 314 [2019-11-23 23:00:42,980 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 316 [2019-11-23 23:00:45,716 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2019-11-23 23:00:45,937 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 326 [2019-11-23 23:00:48,307 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 23:00:48,420 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 331 [2019-11-23 23:00:50,962 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 23:00:51,087 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 334 [2019-11-23 23:00:53,706 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 23:00:53,846 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 336 [2019-11-23 23:00:56,402 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 340 [2019-11-23 23:00:56,532 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 339 [2019-11-23 23:00:56,664 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2019-11-23 23:00:56,782 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 342 [2019-11-23 23:00:56,915 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 23:00:57,028 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 346 [2019-11-23 23:01:00,049 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 23:01:00,202 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 348 [2019-11-23 23:01:00,335 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2019-11-23 23:01:00,460 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 349 [2019-11-23 23:01:00,599 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-23 23:01:00,723 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 353 [2019-11-23 23:01:03,415 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-11-23 23:01:03,573 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 357 [2019-11-23 23:01:06,448 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-11-23 23:01:06,584 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 361 [2019-11-23 23:01:09,850 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 369 [2019-11-23 23:01:10,100 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 365 [2019-11-23 23:01:12,833 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2019-11-23 23:01:12,984 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 367 [2019-11-23 23:01:16,042 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 369 [2019-11-23 23:01:16,218 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 370 [2019-11-23 23:01:19,352 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 374 [2019-11-23 23:01:19,511 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 371