/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_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:12:41,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:12:41,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:12:41,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:12:41,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:12:41,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:12:41,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:12:41,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:12:41,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:12:41,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:12:41,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:12:41,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:12:41,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:12:41,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:12:41,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:12:41,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:12:41,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:12:41,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:12:41,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:12:41,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:12:41,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:12:41,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:12:41,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:12:41,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:12:41,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:12:41,678 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 23:12:41,717 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:12:41,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:12:41,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:12:41,719 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:12:41,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:12:41,719 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:12:41,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:12:41,719 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:12:41,720 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:12:41,722 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:12:41,722 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:12:41,722 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:12:41,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:12:41,723 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:12:41,723 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:12:41,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:12:41,725 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:12:41,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:12:41,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:12:41,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:12:41,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:12:41,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:12:41,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:12:41,726 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:12:41,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:12:41,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:12:41,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:12:41,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:12:41,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:12:41,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:12:41,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:12:41,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:12:41,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:12:41,728 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:12:41,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:12:41,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:12:41,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:12:41,730 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:12:42,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:12:42,042 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:12:42,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:12:42,048 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:12:42,049 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:12:42,049 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2019-11-23 23:12:42,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3988e64f/d08c464c71bd4246a1a17f6fd3ea3b67/FLAGcf3d0554c [2019-11-23 23:12:42,598 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:12:42,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2019-11-23 23:12:42,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3988e64f/d08c464c71bd4246a1a17f6fd3ea3b67/FLAGcf3d0554c [2019-11-23 23:12:42,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3988e64f/d08c464c71bd4246a1a17f6fd3ea3b67 [2019-11-23 23:12:43,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:12:43,006 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:12:43,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:12:43,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:12:43,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:12:43,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:12:42" (1/1) ... [2019-11-23 23:12:43,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e616d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43, skipping insertion in model container [2019-11-23 23:12:43,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:12:42" (1/1) ... [2019-11-23 23:12:43,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:12:43,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:12:43,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:12:43,227 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:12:43,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:12:43,279 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:12:43,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43 WrapperNode [2019-11-23 23:12:43,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:12:43,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:12:43,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:12:43,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:12:43,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (1/1) ... [2019-11-23 23:12:43,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (1/1) ... [2019-11-23 23:12:43,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:12:43,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:12:43,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:12:43,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:12:43,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (1/1) ... [2019-11-23 23:12:43,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (1/1) ... [2019-11-23 23:12:43,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (1/1) ... [2019-11-23 23:12:43,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (1/1) ... [2019-11-23 23:12:43,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (1/1) ... [2019-11-23 23:12:43,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (1/1) ... [2019-11-23 23:12:43,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (1/1) ... [2019-11-23 23:12:43,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:12:43,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:12:43,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:12:43,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:12:43,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (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 23:12:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:12:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:12:43,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:12:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:12:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:12:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:12:43,858 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:12:43,859 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:12:43,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:12:43 BoogieIcfgContainer [2019-11-23 23:12:43,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:12:43,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:12:43,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:12:43,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:12:43,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:12:42" (1/3) ... [2019-11-23 23:12:43,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60756c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:12:43, skipping insertion in model container [2019-11-23 23:12:43,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:43" (2/3) ... [2019-11-23 23:12:43,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60756c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:12:43, skipping insertion in model container [2019-11-23 23:12:43,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:12:43" (3/3) ... [2019-11-23 23:12:43,873 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2019-11-23 23:12:43,893 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:12:43,901 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:12:43,914 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:12:43,943 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:12:43,943 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:12:43,943 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:12:43,944 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:12:43,944 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:12:43,944 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:12:43,944 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:12:43,944 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:12:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:12:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:12:43,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:43,964 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:12:43,965 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1684850581, now seen corresponding path program 1 times [2019-11-23 23:12:43,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:43,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280321092] [2019-11-23 23:12:43,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:44,124 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 23:12:44,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280321092] [2019-11-23 23:12:44,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:12:44,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:12:44,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805780577] [2019-11-23 23:12:44,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:12:44,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:12:44,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:12:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:12:44,145 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:12:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:12:44,191 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2019-11-23 23:12:44,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:12:44,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:12:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:12:44,201 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:12:44,201 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:12:44,204 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 23:12:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:12:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:12:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:12:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-23 23:12:44,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2019-11-23 23:12:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:12:44,234 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-23 23:12:44,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:12:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-23 23:12:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:12:44,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:44,235 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:12:44,236 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:44,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:44,236 INFO L82 PathProgramCache]: Analyzing trace with hash -175580864, now seen corresponding path program 1 times [2019-11-23 23:12:44,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:44,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94247718] [2019-11-23 23:12:44,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:44,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94247718] [2019-11-23 23:12:44,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612006628] [2019-11-23 23:12:44,315 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 23:12:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:44,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:12:44,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:12:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:44,411 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:12:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:44,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085697594] [2019-11-23 23:12:44,466 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:12:44,467 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:12:44,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:12:44,479 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:12:44,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:12:56,395 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2019-11-23 23:12:56,568 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 214 [2019-11-23 23:13:00,868 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 227 [2019-11-23 23:13:12,831 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 257 [2019-11-23 23:13:16,820 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 266 [2019-11-23 23:13:18,626 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 267 [2019-11-23 23:13:20,778 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 273 [2019-11-23 23:13:22,601 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 277 [2019-11-23 23:13:22,752 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 275 [2019-11-23 23:13:24,959 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 282 [2019-11-23 23:13:26,818 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 289 [2019-11-23 23:13:26,927 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 286 [2019-11-23 23:13:28,915 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 290 [2019-11-23 23:13:29,034 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 290 [2019-11-23 23:13:31,012 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2019-11-23 23:13:31,135 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 294 [2019-11-23 23:13:33,513 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-11-23 23:13:33,643 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 295 [2019-11-23 23:13:33,858 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 296 [2019-11-23 23:13:36,004 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2019-11-23 23:13:36,123 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 301 [2019-11-23 23:13:38,393 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2019-11-23 23:13:38,509 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 306 [2019-11-23 23:13:40,717 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 312 [2019-11-23 23:13:40,863 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 310 [2019-11-23 23:13:43,037 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 316 [2019-11-23 23:13:43,190 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 312 [2019-11-23 23:13:43,324 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-23 23:13:43,450 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 312 [2019-11-23 23:13:43,685 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 313 [2019-11-23 23:13:43,813 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-23 23:13:43,930 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 317 [2019-11-23 23:13:46,324 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-23 23:13:46,459 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 320 [2019-11-23 23:13:46,702 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 323 [2019-11-23 23:13:49,305 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2019-11-23 23:13:49,459 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 326 [2019-11-23 23:13:49,597 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2019-11-23 23:13:49,722 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 329 [2019-11-23 23:13:52,203 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2019-11-23 23:13:52,332 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2019-11-23 23:13:54,802 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 341 [2019-11-23 23:13:54,938 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 338 [2019-11-23 23:13:57,467 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 342 [2019-11-23 23:13:57,623 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 340 [2019-11-23 23:14:00,717 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 343 [2019-11-23 23:14:00,880 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 342 [2019-11-23 23:14:01,029 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 23:14:01,166 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 346 [2019-11-23 23:14:03,895 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 23:14:04,042 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 350 [2019-11-23 23:14:07,137 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2019-11-23 23:14:07,552 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 354 [2019-11-23 23:14:10,939 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-23 23:14:11,134 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 358 [2019-11-23 23:14:13,864 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 364 [2019-11-23 23:14:14,038 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 358 [2019-11-23 23:14:14,192 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-23 23:14:14,332 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 359