/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:59:45,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:59:45,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:59:45,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:59:45,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:59:45,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:59:45,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:59:45,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:59:45,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:59:45,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:59:45,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:59:45,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:59:45,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:59:45,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:59:45,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:59:45,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:59:45,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:59:45,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:59:45,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:59:45,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:59:45,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:59:45,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:59:45,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:59:45,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:59:45,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:59:45,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:59:45,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:59:45,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:59:45,637 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 22:59:45,656 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:59:45,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:59:45,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:59:45,657 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:59:45,658 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:59:45,658 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:59:45,658 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:59:45,658 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:59:45,658 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:59:45,659 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:59:45,659 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:59:45,660 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:59:45,660 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:59:45,660 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:59:45,661 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:59:45,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:59:45,662 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:59:45,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:59:45,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:59:45,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:59:45,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:59:45,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:59:45,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:59:45,663 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:59:45,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:59:45,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:59:45,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:59:45,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:59:45,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:59:45,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:59:45,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:59:45,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:59:45,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:59:45,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:59:45,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:59:45,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:59:45,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:59:45,667 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:59:45,975 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:59:45,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:59:45,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:59:45,993 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:59:45,993 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:59:45,994 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2019-11-23 22:59:46,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b2c74ac/b9dcaf926a4d470d84d0c36078049e8d/FLAGa781978c8 [2019-11-23 22:59:46,472 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:59:46,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2019-11-23 22:59:46,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b2c74ac/b9dcaf926a4d470d84d0c36078049e8d/FLAGa781978c8 [2019-11-23 22:59:46,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b2c74ac/b9dcaf926a4d470d84d0c36078049e8d [2019-11-23 22:59:46,906 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:59:46,907 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:59:46,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:46,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:59:46,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:59:46,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c450792 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 22:59:46,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:59:46,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:59:47,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:47,135 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:59:47,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:47,321 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:59:47,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47 WrapperNode [2019-11-23 22:59:47,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:47,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:47,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:59:47,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:59:47,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (1/1) ... [2019-11-23 22:59:47,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (1/1) ... [2019-11-23 22:59:47,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:47,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:59:47,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:59:47,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:59:47,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (1/1) ... [2019-11-23 22:59:47,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (1/1) ... [2019-11-23 22:59:47,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (1/1) ... [2019-11-23 22:59:47,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (1/1) ... [2019-11-23 22:59:47,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (1/1) ... [2019-11-23 22:59:47,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (1/1) ... [2019-11-23 22:59:47,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (1/1) ... [2019-11-23 22:59:47,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:59:47,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:59:47,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:59:47,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:59:47,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (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 22:59:47,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:59:47,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:59:47,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:59:47,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:59:47,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:59:47,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:59:48,107 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:59:48,108 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-23 22:59:48,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:48 BoogieIcfgContainer [2019-11-23 22:59:48,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:59:48,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:59:48,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:59:48,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:59:48,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:59:46" (1/3) ... [2019-11-23 22:59:48,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0db638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:48, skipping insertion in model container [2019-11-23 22:59:48,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:47" (2/3) ... [2019-11-23 22:59:48,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0db638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:48, skipping insertion in model container [2019-11-23 22:59:48,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:48" (3/3) ... [2019-11-23 22:59:48,125 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2019-11-23 22:59:48,135 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:59:48,142 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 22:59:48,151 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 22:59:48,171 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:59:48,171 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:59:48,172 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:59:48,172 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:59:48,172 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:59:48,172 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:59:48,172 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:59:48,172 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:59:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 22:59:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:59:48,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:48,192 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:59:48,192 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash 987396161, now seen corresponding path program 1 times [2019-11-23 22:59:48,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:48,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854350171] [2019-11-23 22:59:48,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:48,336 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 22:59:48,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854350171] [2019-11-23 22:59:48,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:48,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:59:48,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746521363] [2019-11-23 22:59:48,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:59:48,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:59:48,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:59:48,363 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-23 22:59:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:48,438 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2019-11-23 22:59:48,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:59:48,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 22:59:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:48,451 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:59:48,451 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:59:48,454 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 22:59:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:59:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 20. [2019-11-23 22:59:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:59:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2019-11-23 22:59:48,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 6 [2019-11-23 22:59:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:48,494 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2019-11-23 22:59:48,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:59:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2019-11-23 22:59:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:59:48,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:48,495 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:48,495 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:48,496 INFO L82 PathProgramCache]: Analyzing trace with hash 278294635, now seen corresponding path program 1 times [2019-11-23 22:59:48,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:48,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666337942] [2019-11-23 22:59:48,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:48,567 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 22:59:48,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666337942] [2019-11-23 22:59:48,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817886716] [2019-11-23 22:59:48,568 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 22:59:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:48,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:59:48,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:59:48,649 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 22:59:48,650 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:59:48,671 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 22:59:48,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [506773154] [2019-11-23 22:59:48,694 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 22:59:48,694 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:59:48,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:59:48,708 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:59:48,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:00:00,660 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2019-11-23 23:00:00,803 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2019-11-23 23:00:25,101 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 281 [2019-11-23 23:00:29,053 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-23 23:00:29,198 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 289 [2019-11-23 23:00:44,252 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 321 [2019-11-23 23:00:48,845 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 330 [2019-11-23 23:00:48,958 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 326 [2019-11-23 23:00:49,295 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2019-11-23 23:00:49,406 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 331 [2019-11-23 23:00:49,621 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 333 [2019-11-23 23:00:50,061 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 339 [2019-11-23 23:00:52,639 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 23:00:52,754 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 344 [2019-11-23 23:00:55,379 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:00:55,492 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 348 [2019-11-23 23:00:58,014 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:00:58,125 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 352 [2019-11-23 23:01:01,044 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2019-11-23 23:01:01,194 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 355 [2019-11-23 23:01:03,656 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 362 [2019-11-23 23:01:03,799 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 357 [2019-11-23 23:01:06,953 WARN L192 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-11-23 23:01:07,219 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 361 [2019-11-23 23:01:09,797 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 369 [2019-11-23 23:01:09,958 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 363 [2019-11-23 23:01:10,090 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-11-23 23:01:10,208 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2019-11-23 23:01:12,818 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 372 [2019-11-23 23:01:12,958 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 369 [2019-11-23 23:01:15,761 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2019-11-23 23:01:15,895 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 372 [2019-11-23 23:01:18,597 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 375 [2019-11-23 23:01:18,741 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 373 [2019-11-23 23:01:18,883 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 374 [2019-11-23 23:01:18,997 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 375