/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_two_index_03.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:15:42,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:15:42,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:15:42,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:15:42,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:15:42,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:15:42,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:15:42,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:15:42,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:15:42,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:15:42,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:15:42,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:15:42,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:15:42,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:15:42,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:15:42,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:15:42,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:15:42,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:15:42,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:15:42,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:15:42,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:15:42,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:15:42,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:15:42,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:15:42,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:15:42,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:15:42,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:15:42,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:15:42,574 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 23:15:42,608 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:15:42,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:15:42,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:15:42,612 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:15:42,612 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:15:42,612 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:15:42,612 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:15:42,613 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:15:42,613 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:15:42,613 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:15:42,613 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:15:42,613 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:15:42,613 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:15:42,614 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:15:42,614 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:15:42,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:15:42,615 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:15:42,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:15:42,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:15:42,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:15:42,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:15:42,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:15:42,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:15:42,616 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:15:42,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:15:42,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:15:42,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:15:42,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:15:42,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:15:42,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:15:42,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:15:42,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:15:42,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:15:42,618 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:15:42,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:15:42,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:15:42,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:15:42,619 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:15:42,875 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:15:42,895 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:15:42,900 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:15:42,902 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:15:42,902 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:15:42,903 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-11-23 23:15:42,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69045699/f631fa64c05f45eba119b1d4cbe33b99/FLAG079df1d01 [2019-11-23 23:15:43,412 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:15:43,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-11-23 23:15:43,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69045699/f631fa64c05f45eba119b1d4cbe33b99/FLAG079df1d01 [2019-11-23 23:15:43,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69045699/f631fa64c05f45eba119b1d4cbe33b99 [2019-11-23 23:15:43,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:15:43,844 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:15:43,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:43,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:15:43,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:15:43,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:43" (1/1) ... [2019-11-23 23:15:43,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ceb8032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:43, skipping insertion in model container [2019-11-23 23:15:43,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:43" (1/1) ... [2019-11-23 23:15:43,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:15:43,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:15:44,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:44,070 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:15:44,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:44,109 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:15:44,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44 WrapperNode [2019-11-23 23:15:44,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:44,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:44,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:15:44,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:15:44,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (1/1) ... [2019-11-23 23:15:44,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (1/1) ... [2019-11-23 23:15:44,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:44,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:15:44,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:15:44,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:15:44,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (1/1) ... [2019-11-23 23:15:44,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (1/1) ... [2019-11-23 23:15:44,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (1/1) ... [2019-11-23 23:15:44,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (1/1) ... [2019-11-23 23:15:44,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (1/1) ... [2019-11-23 23:15:44,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (1/1) ... [2019-11-23 23:15:44,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (1/1) ... [2019-11-23 23:15:44,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:15:44,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:15:44,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:15:44,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:15:44,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (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 23:15:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:15:44,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:15:44,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:15:44,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:15:44,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:15:44,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:15:44,640 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:15:44,641 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:15:44,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:44 BoogieIcfgContainer [2019-11-23 23:15:44,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:15:44,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:15:44,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:15:44,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:15:44,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:15:43" (1/3) ... [2019-11-23 23:15:44,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7617ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:44, skipping insertion in model container [2019-11-23 23:15:44,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:44" (2/3) ... [2019-11-23 23:15:44,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7617ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:44, skipping insertion in model container [2019-11-23 23:15:44,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:44" (3/3) ... [2019-11-23 23:15:44,649 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2019-11-23 23:15:44,657 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:15:44,663 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:15:44,675 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:15:44,696 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:15:44,697 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:15:44,697 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:15:44,697 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:15:44,697 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:15:44,697 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:15:44,697 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:15:44,697 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:15:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:15:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:15:44,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:44,715 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:15:44,716 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1774611857, now seen corresponding path program 1 times [2019-11-23 23:15:44,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:44,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708643611] [2019-11-23 23:15:44,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:44,865 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 23:15:44,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708643611] [2019-11-23 23:15:44,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:15:44,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:15:44,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110869638] [2019-11-23 23:15:44,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:15:44,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:44,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:15:44,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:15:44,889 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:15:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:44,949 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-23 23:15:44,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:15:44,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:15:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:44,960 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:15:44,960 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:15:44,964 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 23:15:44,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:15:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:15:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:15:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-23 23:15:44,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-23 23:15:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:44,995 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-23 23:15:44,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:15:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-23 23:15:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:15:44,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:44,997 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:44,998 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:44,999 INFO L82 PathProgramCache]: Analyzing trace with hash -610925648, now seen corresponding path program 1 times [2019-11-23 23:15:44,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:45,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84388422] [2019-11-23 23:15:45,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:15:45,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84388422] [2019-11-23 23:15:45,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778240754] [2019-11-23 23:15:45,066 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 23:15:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:45,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:15:45,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:45,141 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 23:15:45,141 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:45,154 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 23:15:45,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:15:45,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2019-11-23 23:15:45,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642466090] [2019-11-23 23:15:45,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:15:45,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:45,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:15:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:45,158 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-11-23 23:15:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:45,226 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 23:15:45,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:15:45,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:15:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:45,228 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:15:45,228 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:15:45,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:45,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:15:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2019-11-23 23:15:45,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:15:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 23:15:45,238 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-11-23 23:15:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:45,239 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 23:15:45,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:15:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 23:15:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:15:45,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:45,242 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:45,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:15:45,447 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:45,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1417050161, now seen corresponding path program 1 times [2019-11-23 23:15:45,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:45,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59087051] [2019-11-23 23:15:45,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:45,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59087051] [2019-11-23 23:15:45,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138792398] [2019-11-23 23:15:45,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:15:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:45,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:15:45,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:45,649 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:45,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2046781878] [2019-11-23 23:15:45,711 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:15:45,712 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:15:45,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:15:45,724 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:15:45,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:15:57,797 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 184 [2019-11-23 23:16:15,667 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2019-11-23 23:16:15,832 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 245 [2019-11-23 23:16:17,404 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 248 [2019-11-23 23:16:22,618 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 265 [2019-11-23 23:16:24,233 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 269 [2019-11-23 23:16:27,877 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 276 [2019-11-23 23:16:31,474 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2019-11-23 23:16:33,448 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 294 [2019-11-23 23:16:33,558 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 286 [2019-11-23 23:16:35,376 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-23 23:16:37,369 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 299 [2019-11-23 23:16:37,501 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 292 [2019-11-23 23:16:37,740 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 291 [2019-11-23 23:16:39,914 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 297 [2019-11-23 23:16:41,975 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 299 [2019-11-23 23:16:42,178 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 302 [2019-11-23 23:16:44,386 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 307 [2019-11-23 23:16:46,809 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 310 [2019-11-23 23:16:48,980 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2019-11-23 23:16:49,095 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 310 [2019-11-23 23:16:51,497 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 316 [2019-11-23 23:16:56,417 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 328 [2019-11-23 23:16:56,529 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 324 [2019-11-23 23:16:59,178 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2019-11-23 23:16:59,507 WARN L192 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 326 [2019-11-23 23:17:02,278 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 329 [2019-11-23 23:17:04,701 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 333 [2019-11-23 23:17:06,938 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 339 [2019-11-23 23:17:07,050 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 337 [2019-11-23 23:17:09,438 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2019-11-23 23:17:09,567 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 341 [2019-11-23 23:17:11,875 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 345 [2019-11-23 23:17:12,007 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 345 [2019-11-23 23:17:14,483 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2019-11-23 23:17:14,610 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 350