/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_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:09:22,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:09:22,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:09:22,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:09:22,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:09:22,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:09:22,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:09:22,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:09:22,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:09:22,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:09:22,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:09:22,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:09:22,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:09:22,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:09:22,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:09:22,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:09:22,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:09:22,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:09:22,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:09:22,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:09:22,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:09:22,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:09:22,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:09:22,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:09:22,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:09:22,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:09:22,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:09:22,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:09:22,453 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 23:09:22,467 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:09:22,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:09:22,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:09:22,468 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:09:22,468 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:09:22,468 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:09:22,469 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:09:22,469 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:09:22,469 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:09:22,469 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:09:22,469 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:09:22,470 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:09:22,470 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:09:22,470 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:09:22,470 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:09:22,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:09:22,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:09:22,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:09:22,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:09:22,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:09:22,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:09:22,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:09:22,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:09:22,472 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:09:22,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:09:22,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:09:22,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:09:22,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:09:22,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:09:22,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:09:22,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:09:22,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:09:22,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:09:22,475 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:09:22,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:09:22,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:09:22,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:09:22,475 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:09:22,784 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:09:22,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:09:22,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:09:22,809 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:09:22,810 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:09:22,810 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-11-23 23:09:22,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b48860d44/b9949e41c90649fc9edfc700e3ae860e/FLAG5e477a0d1 [2019-11-23 23:09:23,333 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:09:23,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-11-23 23:09:23,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b48860d44/b9949e41c90649fc9edfc700e3ae860e/FLAG5e477a0d1 [2019-11-23 23:09:23,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b48860d44/b9949e41c90649fc9edfc700e3ae860e [2019-11-23 23:09:23,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:09:23,717 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:09:23,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:09:23,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:09:23,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:09:23,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:23,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1348e435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23, skipping insertion in model container [2019-11-23 23:09:23,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:23,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:09:23,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:09:23,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:09:23,949 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:09:23,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:09:23,987 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:09:23,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23 WrapperNode [2019-11-23 23:09:23,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:09:23,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:09:23,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:09:23,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:09:23,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:24,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:24,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:09:24,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:09:24,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:09:24,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:09:24,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:24,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:24,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:24,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:24,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:24,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:24,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (1/1) ... [2019-11-23 23:09:24,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:09:24,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:09:24,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:09:24,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:09:24,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (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 23:09:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:09:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:09:24,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:09:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:09:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:09:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:09:24,604 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:09:24,605 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 23:09:24,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:09:24 BoogieIcfgContainer [2019-11-23 23:09:24,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:09:24,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:09:24,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:09:24,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:09:24,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:09:23" (1/3) ... [2019-11-23 23:09:24,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edc4738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:09:24, skipping insertion in model container [2019-11-23 23:09:24,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:09:23" (2/3) ... [2019-11-23 23:09:24,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edc4738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:09:24, skipping insertion in model container [2019-11-23 23:09:24,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:09:24" (3/3) ... [2019-11-23 23:09:24,613 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2019-11-23 23:09:24,622 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:09:24,628 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:09:24,640 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:09:24,663 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:09:24,663 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:09:24,663 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:09:24,663 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:09:24,663 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:09:24,664 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:09:24,664 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:09:24,664 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:09:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 23:09:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:09:24,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:09:24,686 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:09:24,686 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:09:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:09:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1470387935, now seen corresponding path program 1 times [2019-11-23 23:09:24,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:09:24,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956641965] [2019-11-23 23:09:24,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:09:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:24,841 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 23:09:24,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956641965] [2019-11-23 23:09:24,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:09:24,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:09:24,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868210573] [2019-11-23 23:09:24,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:09:24,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:09:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:09:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:09:24,864 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-23 23:09:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:09:24,926 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2019-11-23 23:09:24,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:09:24,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 23:09:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:09:24,940 INFO L225 Difference]: With dead ends: 27 [2019-11-23 23:09:24,940 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 23:09:24,947 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 23:09:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 23:09:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 23:09:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 23:09:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2019-11-23 23:09:24,983 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 9 [2019-11-23 23:09:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:09:24,983 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2019-11-23 23:09:24,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:09:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2019-11-23 23:09:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 23:09:24,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:09:24,985 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:09:24,985 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:09:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:09:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash 952339062, now seen corresponding path program 1 times [2019-11-23 23:09:24,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:09:24,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844860276] [2019-11-23 23:09:24,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:09:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 23:09:25,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844860276] [2019-11-23 23:09:25,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449082300] [2019-11-23 23:09:25,067 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 23:09:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:09:25,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:09:25,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:09:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 23:09:25,158 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:09:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 23:09:25,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059275705] [2019-11-23 23:09:25,211 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:09:25,212 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:09:25,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:09:25,226 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:09:25,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:10:15,115 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 319 [2019-11-23 23:10:17,787 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 327 [2019-11-23 23:10:25,171 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2019-11-23 23:10:30,416 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 347 [2019-11-23 23:10:30,582 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 345 [2019-11-23 23:10:30,765 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 23:10:30,873 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 348 [2019-11-23 23:10:33,592 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 351 [2019-11-23 23:10:39,252 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 361 [2019-11-23 23:10:41,905 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365 [2019-11-23 23:10:44,691 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 368 [2019-11-23 23:10:47,559 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 370 [2019-11-23 23:10:50,212 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 375 [2019-11-23 23:10:50,324 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 374 [2019-11-23 23:10:53,188 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 378 [2019-11-23 23:10:53,308 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 378 [2019-11-23 23:10:56,160 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 386 [2019-11-23 23:10:56,289 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 380