/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_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:06:13,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:06:13,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:06:13,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:06:13,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:06:13,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:06:13,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:06:13,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:06:13,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:06:13,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:06:13,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:06:13,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:06:13,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:06:13,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:06:13,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:06:13,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:06:13,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:06:13,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:06:13,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:06:13,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:06:13,132 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 23:06:13,149 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:06:13,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:06:13,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:06:13,151 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:06:13,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:06:13,151 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:06:13,151 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:06:13,151 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:06:13,152 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:06:13,152 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:06:13,152 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:06:13,152 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:06:13,152 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:06:13,153 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:06:13,153 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:06:13,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:06:13,154 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:06:13,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:06:13,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:06:13,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:06:13,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:06:13,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:06:13,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:06:13,155 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:06:13,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:06:13,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:06:13,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:06:13,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:06:13,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:06:13,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:06:13,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:06:13,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:06:13,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:06:13,157 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:06:13,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:06:13,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:06:13,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:06:13,158 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:06:13,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:06:13,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:06:13,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:06:13,457 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:06:13,458 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:06:13,458 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-11-23 23:06:13,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/359dfadd1/1ec662a05ff742e189fcc27449b21f2c/FLAG54a853a64 [2019-11-23 23:06:13,927 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:06:13,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-11-23 23:06:13,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/359dfadd1/1ec662a05ff742e189fcc27449b21f2c/FLAG54a853a64 [2019-11-23 23:06:14,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/359dfadd1/1ec662a05ff742e189fcc27449b21f2c [2019-11-23 23:06:14,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:06:14,354 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:06:14,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:06:14,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:06:14,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:06:14,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5362047b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14, skipping insertion in model container [2019-11-23 23:06:14,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:06:14,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:06:14,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:06:14,595 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:06:14,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:06:14,641 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:06:14,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14 WrapperNode [2019-11-23 23:06:14,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:06:14,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:06:14,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:06:14,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:06:14,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:06:14,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:06:14,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:06:14,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:06:14,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (1/1) ... [2019-11-23 23:06:14,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:06:14,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:06:14,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:06:14,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:06:14,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (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 23:06:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:06:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:06:14,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:06:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:06:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:06:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:06:15,264 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:06:15,264 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 23:06:15,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:06:15 BoogieIcfgContainer [2019-11-23 23:06:15,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:06:15,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:06:15,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:06:15,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:06:15,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:06:14" (1/3) ... [2019-11-23 23:06:15,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32413a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:06:15, skipping insertion in model container [2019-11-23 23:06:15,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:06:14" (2/3) ... [2019-11-23 23:06:15,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32413a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:06:15, skipping insertion in model container [2019-11-23 23:06:15,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:06:15" (3/3) ... [2019-11-23 23:06:15,272 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2019-11-23 23:06:15,281 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:06:15,288 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:06:15,300 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:06:15,323 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:06:15,324 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:06:15,324 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:06:15,324 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:06:15,324 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:06:15,324 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:06:15,325 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:06:15,325 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:06:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:06:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:06:15,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:06:15,346 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:06:15,347 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:06:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:06:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1593503603, now seen corresponding path program 1 times [2019-11-23 23:06:15,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:06:15,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067575900] [2019-11-23 23:06:15,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:06:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:06:15,505 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 23:06:15,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067575900] [2019-11-23 23:06:15,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:06:15,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:06:15,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437753170] [2019-11-23 23:06:15,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:06:15,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:06:15,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:06:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:06:15,530 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 23:06:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:06:15,584 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 23:06:15,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:06:15,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:06:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:06:15,598 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:06:15,599 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:06:15,607 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 23:06:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:06:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:06:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:06:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-23 23:06:15,639 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2019-11-23 23:06:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:06:15,639 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-23 23:06:15,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:06:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-23 23:06:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:06:15,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:06:15,641 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:06:15,641 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:06:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:06:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1920688250, now seen corresponding path program 1 times [2019-11-23 23:06:15,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:06:15,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064570564] [2019-11-23 23:06:15,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:06:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:06:15,729 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 23:06:15,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064570564] [2019-11-23 23:06:15,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419609262] [2019-11-23 23:06:15,730 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 23:06:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:06:15,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:06:15,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:06:15,836 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 23:06:15,837 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:06:15,857 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 23:06:15,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195530719] [2019-11-23 23:06:15,887 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:06:15,887 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:06:15,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:06:15,925 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:06:15,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:06:32,892 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 220 [2019-11-23 23:06:41,338 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2019-11-23 23:06:45,280 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2019-11-23 23:06:45,391 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 244 [2019-11-23 23:06:47,644 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2019-11-23 23:06:47,911 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 247 [2019-11-23 23:06:54,880 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 266 [2019-11-23 23:07:14,829 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 310 [2019-11-23 23:07:15,248 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 316 [2019-11-23 23:07:22,144 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 334 [2019-11-23 23:07:22,290 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 328 [2019-11-23 23:07:25,425 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 332 [2019-11-23 23:07:28,254 WARN L192 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-23 23:07:28,464 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 338 [2019-11-23 23:07:31,095 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 340 [2019-11-23 23:07:31,318 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 343 [2019-11-23 23:07:33,734 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 23:07:33,851 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 348 [2019-11-23 23:07:36,269 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 355 [2019-11-23 23:07:36,387 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 353 [2019-11-23 23:07:38,855 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 362 [2019-11-23 23:07:38,978 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 358 [2019-11-23 23:07:41,511 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 362 [2019-11-23 23:07:41,643 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 359