/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-programs/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:22:34,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:22:34,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:22:34,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:22:34,153 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 23:22:34,174 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:22:34,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:22:34,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:22:34,176 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:22:34,176 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:22:34,176 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:22:34,176 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:22:34,177 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:22:34,177 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:22:34,177 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:22:34,177 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:22:34,177 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:22:34,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:22:34,178 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:22:34,178 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:22:34,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:22:34,179 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:22:34,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:22:34,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:22:34,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:22:34,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:22:34,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:22:34,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:22:34,180 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:22:34,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:22:34,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:22:34,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:22:34,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:22:34,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:22:34,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:22:34,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:22:34,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:22:34,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:22:34,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:22:34,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:22:34,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:22:34,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:22:34,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:22:34,447 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:22:34,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:22:34,469 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:22:34,470 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:22:34,471 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:22:34,471 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2019-11-23 23:22:34,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07ee9e8ce/e89ab25cf4e14675997cea10af0dbe22/FLAG5d10bc07c [2019-11-23 23:22:34,956 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:22:34,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i [2019-11-23 23:22:34,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07ee9e8ce/e89ab25cf4e14675997cea10af0dbe22/FLAG5d10bc07c [2019-11-23 23:22:35,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07ee9e8ce/e89ab25cf4e14675997cea10af0dbe22 [2019-11-23 23:22:35,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:22:35,351 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:22:35,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:22:35,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:22:35,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:22:35,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2439b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35, skipping insertion in model container [2019-11-23 23:22:35,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:22:35,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:22:35,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:22:35,552 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:22:35,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:22:35,587 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:22:35,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35 WrapperNode [2019-11-23 23:22:35,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:22:35,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:22:35,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:22:35,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:22:35,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:22:35,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:22:35,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:22:35,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:22:35,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (1/1) ... [2019-11-23 23:22:35,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:22:35,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:22:35,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:22:35,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:22:35,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (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 23:22:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:22:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:22:35,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:22:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:22:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:22:35,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:22:36,213 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:22:36,214 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:22:36,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:22:36 BoogieIcfgContainer [2019-11-23 23:22:36,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:22:36,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:22:36,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:22:36,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:22:36,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:22:35" (1/3) ... [2019-11-23 23:22:36,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56348bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:22:36, skipping insertion in model container [2019-11-23 23:22:36,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:22:35" (2/3) ... [2019-11-23 23:22:36,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56348bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:22:36, skipping insertion in model container [2019-11-23 23:22:36,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:22:36" (3/3) ... [2019-11-23 23:22:36,223 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2019-11-23 23:22:36,231 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:22:36,238 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:22:36,248 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:22:36,268 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:22:36,268 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:22:36,269 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:22:36,269 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:22:36,269 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:22:36,269 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:22:36,269 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:22:36,269 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:22:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 23:22:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:22:36,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:22:36,287 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:22:36,287 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:22:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:22:36,292 INFO L82 PathProgramCache]: Analyzing trace with hash -26860634, now seen corresponding path program 1 times [2019-11-23 23:22:36,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:22:36,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991141211] [2019-11-23 23:22:36,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:22:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:22:36,441 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 23:22:36,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991141211] [2019-11-23 23:22:36,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:22:36,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:22:36,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330058732] [2019-11-23 23:22:36,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:22:36,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:22:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:22:36,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:22:36,471 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 23:22:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:22:36,512 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2019-11-23 23:22:36,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:22:36,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:22:36,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:22:36,527 INFO L225 Difference]: With dead ends: 22 [2019-11-23 23:22:36,528 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:22:36,531 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 23:22:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:22:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:22:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:22:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-23 23:22:36,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2019-11-23 23:22:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:22:36,572 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-23 23:22:36,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:22:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-23 23:22:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:22:36,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:22:36,574 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:22:36,574 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:22:36,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:22:36,575 INFO L82 PathProgramCache]: Analyzing trace with hash -153621933, now seen corresponding path program 1 times [2019-11-23 23:22:36,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:22:36,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155140184] [2019-11-23 23:22:36,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:22:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:22:36,674 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 23:22:36,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155140184] [2019-11-23 23:22:36,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288926021] [2019-11-23 23:22:36,676 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 23:22:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:22:36,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:22:36,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:22:36,774 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 23:22:36,774 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:22:36,799 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 23:22:36,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479177693] [2019-11-23 23:22:36,825 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:22:36,825 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:22:36,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:22:36,840 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:22:36,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:22:39,514 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2019-11-23 23:22:40,144 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 167 [2019-11-23 23:22:41,806 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 188 [2019-11-23 23:22:43,743 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-23 23:22:47,501 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 196 [2019-11-23 23:22:49,593 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2019-11-23 23:22:52,154 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 187 [2019-11-23 23:22:54,159 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2019-11-23 23:22:54,396 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 188 [2019-11-23 23:22:54,554 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-23 23:22:54,693 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 190 [2019-11-23 23:22:57,358 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 217 [2019-11-23 23:23:00,022 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-11-23 23:23:05,442 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 225 [2019-11-23 23:23:11,062 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2019-11-23 23:23:13,902 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 234 [2019-11-23 23:23:17,136 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 243 [2019-11-23 23:23:20,526 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 246 [2019-11-23 23:23:23,639 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 246 [2019-11-23 23:23:27,327 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 255 [2019-11-23 23:23:31,045 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 256 [2019-11-23 23:23:34,791 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 261 [2019-11-23 23:23:38,571 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 262 [2019-11-23 23:23:42,336 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 265 [2019-11-23 23:23:46,447 WARN L192 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 270 [2019-11-23 23:23:46,628 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2019-11-23 23:23:46,763 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 252 [2019-11-23 23:23:50,446 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 271 [2019-11-23 23:23:54,568 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-23 23:23:58,589 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 278 [2019-11-23 23:24:02,965 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 280 [2019-11-23 23:24:07,924 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 288