/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_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:14:12,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:14:12,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:14:12,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:14:12,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:14:12,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:14:12,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:14:12,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:14:12,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:14:12,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:14:12,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:14:12,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:14:12,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:14:12,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:14:12,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:14:12,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:14:12,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:14:12,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:14:12,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:14:12,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:14:12,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:14:12,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:14:12,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:14:12,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:14:12,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:14:12,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:14:12,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:14:12,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:14:12,257 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 23:14:12,279 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:14:12,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:14:12,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:14:12,280 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:14:12,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:14:12,281 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:14:12,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:14:12,281 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:14:12,281 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:14:12,281 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:14:12,283 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:14:12,283 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:14:12,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:14:12,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:14:12,284 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:14:12,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:14:12,285 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:14:12,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:14:12,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:14:12,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:14:12,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:14:12,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:14:12,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:14:12,287 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:14:12,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:14:12,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:14:12,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:14:12,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:14:12,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:14:12,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:14:12,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:14:12,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:14:12,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:14:12,290 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:14:12,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:14:12,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:14:12,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:14:12,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:14:12,595 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:14:12,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:14:12,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:14:12,621 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:14:12,622 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:14:12,622 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2019-11-23 23:14:12,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba186c27b/ce9d5430e354485fb4447dff6f1ea6de/FLAG9e4ee3e87 [2019-11-23 23:14:13,196 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:14:13,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2019-11-23 23:14:13,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba186c27b/ce9d5430e354485fb4447dff6f1ea6de/FLAG9e4ee3e87 [2019-11-23 23:14:13,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba186c27b/ce9d5430e354485fb4447dff6f1ea6de [2019-11-23 23:14:13,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:14:13,604 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:14:13,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:14:13,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:14:13,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:14:13,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:13,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51664aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13, skipping insertion in model container [2019-11-23 23:14:13,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:13,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:14:13,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:14:13,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:14:13,858 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:14:13,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:14:13,898 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:14:13,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13 WrapperNode [2019-11-23 23:14:13,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:14:13,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:14:13,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:14:13,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:14:13,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:13,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:14,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:14:14,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:14:14,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:14:14,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:14:14,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:14,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:14,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:14,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:14,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:14,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:14,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (1/1) ... [2019-11-23 23:14:14,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:14:14,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:14:14,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:14:14,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:14:14,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (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 23:14:14,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:14:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:14:14,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:14:14,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:14:14,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:14:14,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:14:14,438 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:14:14,438 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-23 23:14:14,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:14:14 BoogieIcfgContainer [2019-11-23 23:14:14,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:14:14,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:14:14,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:14:14,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:14:14,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:14:13" (1/3) ... [2019-11-23 23:14:14,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a5aa3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:14:14, skipping insertion in model container [2019-11-23 23:14:14,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:13" (2/3) ... [2019-11-23 23:14:14,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a5aa3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:14:14, skipping insertion in model container [2019-11-23 23:14:14,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:14:14" (3/3) ... [2019-11-23 23:14:14,451 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2019-11-23 23:14:14,463 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:14:14,471 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:14:14,486 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:14:14,512 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:14:14,513 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:14:14,513 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:14:14,513 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:14:14,513 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:14:14,513 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:14:14,513 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:14:14,514 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:14:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 23:14:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:14:14,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:14:14,538 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:14:14,538 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:14:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:14:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1470125971, now seen corresponding path program 1 times [2019-11-23 23:14:14,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:14:14,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443009014] [2019-11-23 23:14:14,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:14:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:14,689 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 23:14:14,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443009014] [2019-11-23 23:14:14,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:14:14,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:14:14,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814245841] [2019-11-23 23:14:14,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:14:14,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:14:14,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:14:14,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:14:14,709 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 23:14:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:14:14,738 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2019-11-23 23:14:14,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:14:14,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:14:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:14:14,749 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:14:14,749 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:14:14,752 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 23:14:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:14:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:14:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:14:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-23 23:14:14,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-11-23 23:14:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:14:14,782 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-23 23:14:14,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:14:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-23 23:14:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:14:14,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:14:14,783 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:14:14,783 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:14:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:14:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1472494741, now seen corresponding path program 1 times [2019-11-23 23:14:14,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:14:14,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073620416] [2019-11-23 23:14:14,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:14:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:14:14,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073620416] [2019-11-23 23:14:14,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:14:14,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 23:14:14,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130588138] [2019-11-23 23:14:14,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 23:14:14,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:14:14,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 23:14:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:14:14,887 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2019-11-23 23:14:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:14:14,958 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-23 23:14:14,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:14:14,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-23 23:14:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:14:14,959 INFO L225 Difference]: With dead ends: 15 [2019-11-23 23:14:14,960 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:14:14,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:14:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:14:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:14:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:14:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 23:14:14,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2019-11-23 23:14:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:14:14,965 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 23:14:14,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 23:14:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 23:14:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:14:14,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:14:14,967 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:14:14,967 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:14:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:14:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2021117496, now seen corresponding path program 1 times [2019-11-23 23:14:14,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:14:14,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225913208] [2019-11-23 23:14:14,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:14:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:14:15,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225913208] [2019-11-23 23:14:15,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903905317] [2019-11-23 23:14:15,020 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 23:14:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:15,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:14:15,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:14:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:14:15,104 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:14:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:14:15,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101240657] [2019-11-23 23:14:15,158 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:14:15,158 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:14:15,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:14:15,181 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:14:15,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:14:17,313 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 132 [2019-11-23 23:14:26,619 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2019-11-23 23:14:26,752 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 191 [2019-11-23 23:14:30,050 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 202 [2019-11-23 23:14:30,262 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 200 [2019-11-23 23:14:55,497 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2019-11-23 23:14:55,727 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 278 [2019-11-23 23:14:59,753 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 290 [2019-11-23 23:15:03,699 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 298 [2019-11-23 23:15:04,058 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 300 [2019-11-23 23:15:04,290 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 302 [2019-11-23 23:15:09,129 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 311 [2019-11-23 23:15:11,704 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 317 [2019-11-23 23:15:13,933 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 321 [2019-11-23 23:15:16,231 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-23 23:15:16,348 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 325 [2019-11-23 23:15:18,500 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 330 [2019-11-23 23:15:18,627 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 327 [2019-11-23 23:15:21,029 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 331 [2019-11-23 23:15:23,754 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 332 [2019-11-23 23:15:26,573 WARN L192 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 341 [2019-11-23 23:15:26,780 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 338 [2019-11-23 23:15:29,512 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 340 [2019-11-23 23:15:29,641 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2019-11-23 23:15:29,751 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 343 [2019-11-23 23:15:32,394 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 350 [2019-11-23 23:15:32,733 WARN L192 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 347 [2019-11-23 23:15:35,591 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 353 [2019-11-23 23:15:35,731 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 350 [2019-11-23 23:15:35,879 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2019-11-23 23:15:36,031 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 352 [2019-11-23 23:15:36,162 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2019-11-23 23:15:36,266 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 355 [2019-11-23 23:15:39,022 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2019-11-23 23:15:39,156 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 358 [2019-11-23 23:15:39,284 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-11-23 23:15:39,393 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 361 [2019-11-23 23:15:42,090 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 366 [2019-11-23 23:15:42,217 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365