/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/standard_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:09:19,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:09:19,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:09:19,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:09:19,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:09:19,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:09:19,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:09:19,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:09:19,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:09:19,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:09:19,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:09:19,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:09:19,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:09:19,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:09:19,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:09:19,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:09:19,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:09:19,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:09:19,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:09:19,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:09:19,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:09:19,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:09:19,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:09:19,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:09:19,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:09:19,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 23:09:19,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 23:09:19,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 23:09:19,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 23:09:19,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 23:09:19,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 23:09:19,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 23:09:19,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 23:09:19,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:09:19,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:09:19,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:09:19,477 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 23:09:19,492 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:09:19,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:09:19,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:09:19,493 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:09:19,493 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:09:19,493 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:09:19,494 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:09:19,494 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:09:19,494 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:09:19,494 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:09:19,494 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:09:19,494 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:09:19,495 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:09:19,495 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:09:19,495 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:09:19,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:09:19,496 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:09:19,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:09:19,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:09:19,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:09:19,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:09:19,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:09:19,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:09:19,497 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:09:19,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:09:19,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:09:19,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:09:19,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:09:19,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:09:19,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:09:19,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:09:19,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:09:19,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:09:19,499 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:09:19,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:09:19,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:09:19,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:09:19,500 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:09:19,806 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:09:19,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:09:19,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:09:19,823 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:09:19,824 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:09:19,825 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2019-11-23 23:09:19,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76e7f045d/cb8cdef7dbc840f587c4da923adaf110/FLAG42edd3e6a [2019-11-23 23:09:20,366 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:09:20,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2019-11-23 23:09:20,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76e7f045d/cb8cdef7dbc840f587c4da923adaf110/FLAG42edd3e6a [2019-11-23 23:09:20,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76e7f045d/cb8cdef7dbc840f587c4da923adaf110 [2019-11-23 23:09:20,732 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:09:20,733 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:09:20,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:09:20,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:09:20,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:09:20,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:09:20" (1/1) ... [2019-11-23 23:09:20,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3519059f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:20, skipping insertion in model container [2019-11-23 23:09:20,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:09:20" (1/1) ... [2019-11-23 23:09:20,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:09:20,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:09:20,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:09:20,964 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:09:20,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:09:21,005 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:09:21,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21 WrapperNode [2019-11-23 23:09:21,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:09:21,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:09:21,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:09:21,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:09:21,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (1/1) ... [2019-11-23 23:09:21,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (1/1) ... [2019-11-23 23:09:21,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:09:21,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:09:21,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:09:21,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:09:21,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (1/1) ... [2019-11-23 23:09:21,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (1/1) ... [2019-11-23 23:09:21,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (1/1) ... [2019-11-23 23:09:21,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (1/1) ... [2019-11-23 23:09:21,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (1/1) ... [2019-11-23 23:09:21,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (1/1) ... [2019-11-23 23:09:21,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (1/1) ... [2019-11-23 23:09:21,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:09:21,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:09:21,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:09:21,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:09:21,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (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 23:09:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:09:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:09:21,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:09:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:09:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:09:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:09:21,575 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:09:21,576 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 23:09:21,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:09:21 BoogieIcfgContainer [2019-11-23 23:09:21,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:09:21,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:09:21,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:09:21,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:09:21,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:09:20" (1/3) ... [2019-11-23 23:09:21,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30446a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:09:21, skipping insertion in model container [2019-11-23 23:09:21,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:21" (2/3) ... [2019-11-23 23:09:21,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30446a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:09:21, skipping insertion in model container [2019-11-23 23:09:21,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:09:21" (3/3) ... [2019-11-23 23:09:21,585 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2019-11-23 23:09:21,594 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:09:21,602 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:09:21,614 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:09:21,637 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:09:21,637 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:09:21,637 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:09:21,638 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:09:21,638 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:09:21,638 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:09:21,638 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:09:21,638 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:09:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 23:09:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:09:21,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:09:21,656 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:09:21,656 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:09:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:09:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash 531840531, now seen corresponding path program 1 times [2019-11-23 23:09:21,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:09:21,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771013835] [2019-11-23 23:09:21,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:09:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:21,809 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 23:09:21,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771013835] [2019-11-23 23:09:21,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:09:21,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:09:21,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441712244] [2019-11-23 23:09:21,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:09:21,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:09:21,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:09:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:09:21,834 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 23:09:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:09:21,895 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2019-11-23 23:09:21,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:09:21,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:09:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:09:21,907 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:09:21,907 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 23:09:21,910 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 23:09:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 23:09:21,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 23:09:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 23:09:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2019-11-23 23:09:21,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2019-11-23 23:09:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:09:21,948 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2019-11-23 23:09:21,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:09:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2019-11-23 23:09:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 23:09:21,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:09:21,950 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:09:21,950 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:09:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:09:21,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1496312537, now seen corresponding path program 1 times [2019-11-23 23:09:21,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:09:21,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414024733] [2019-11-23 23:09:21,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:09:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:09:22,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414024733] [2019-11-23 23:09:22,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227361354] [2019-11-23 23:09:22,006 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 23:09:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:22,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:09:22,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:09:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:09:22,108 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:09:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:09:22,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [939562641] [2019-11-23 23:09:22,165 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:09:22,165 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:09:22,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:09:22,197 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:09:22,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:10:27,691 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-11-23 23:10:27,850 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 315 [2019-11-23 23:10:30,189 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 318 [2019-11-23 23:10:32,748 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 321 [2019-11-23 23:10:35,829 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 335 [2019-11-23 23:10:46,244 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 353 [2019-11-23 23:10:46,362 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 348 [2019-11-23 23:10:52,070 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 357