/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/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:21:34,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:21:34,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:21:34,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:21:34,291 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 [2019-11-24 04:21:34,305 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:21:34,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:21:34,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:21:34,306 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:21:34,306 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:21:34,307 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:21:34,307 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:21:34,307 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:21:34,307 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:21:34,307 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:21:34,308 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:21:34,308 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:21:34,308 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:21:34,308 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:21:34,308 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:21:34,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:21:34,309 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:21:34,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:21:34,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:21:34,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:21:34,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:21:34,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:21:34,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:21:34,311 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:21:34,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:21:34,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:21:34,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:21:34,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:21:34,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:21:34,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:21:34,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:21:34,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:21:34,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:21:34,313 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:21:34,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:21:34,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:21:34,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:21:34,313 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:21:34,584 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:21:34,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:21:34,603 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:21:34,604 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:21:34,604 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:21:34,605 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2019-11-24 04:21:34,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335d3d765/300290712e904d07bda6fe19809155f6/FLAGed9285a6c [2019-11-24 04:21:35,158 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:21:35,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2019-11-24 04:21:35,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335d3d765/300290712e904d07bda6fe19809155f6/FLAGed9285a6c [2019-11-24 04:21:35,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335d3d765/300290712e904d07bda6fe19809155f6 [2019-11-24 04:21:35,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:21:35,589 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:21:35,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:21:35,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:21:35,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:21:35,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28abfc9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35, skipping insertion in model container [2019-11-24 04:21:35,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:21:35,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:21:35,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:21:35,801 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:21:35,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:21:35,832 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:21:35,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35 WrapperNode [2019-11-24 04:21:35,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:21:35,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:21:35,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:21:35,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:21:35,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:21:35,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:21:35,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:21:35,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:21:35,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (1/1) ... [2019-11-24 04:21:35,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:21:35,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:21:35,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:21:35,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:21:35,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (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 [2019-11-24 04:21:36,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:21:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:21:36,276 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:21:36,277 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 04:21:36,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:21:36 BoogieIcfgContainer [2019-11-24 04:21:36,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:21:36,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:21:36,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:21:36,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:21:36,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:21:35" (1/3) ... [2019-11-24 04:21:36,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d72333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:21:36, skipping insertion in model container [2019-11-24 04:21:36,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:35" (2/3) ... [2019-11-24 04:21:36,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d72333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:21:36, skipping insertion in model container [2019-11-24 04:21:36,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:21:36" (3/3) ... [2019-11-24 04:21:36,299 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2019-11-24 04:21:36,311 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:21:36,317 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:21:36,327 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:21:36,351 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:21:36,351 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:21:36,351 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:21:36,351 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:21:36,352 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:21:36,352 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:21:36,352 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:21:36,352 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:21:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 04:21:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:21:36,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:21:36,368 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:21:36,368 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:21:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:21:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1005015, now seen corresponding path program 1 times [2019-11-24 04:21:36,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:21:36,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254548919] [2019-11-24 04:21:36,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:21:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:21:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:21:36,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254548919] [2019-11-24 04:21:36,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:21:36,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:21:36,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547511405] [2019-11-24 04:21:36,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:21:36,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:21:36,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:21:36,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:21:36,577 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2019-11-24 04:21:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:21:36,658 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-24 04:21:36,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:21:36,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-24 04:21:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:21:36,668 INFO L225 Difference]: With dead ends: 27 [2019-11-24 04:21:36,668 INFO L226 Difference]: Without dead ends: 15 [2019-11-24 04:21:36,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:21:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-24 04:21:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2019-11-24 04:21:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:21:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-24 04:21:36,699 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2019-11-24 04:21:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:21:36,700 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-24 04:21:36,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:21:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-24 04:21:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:21:36,701 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:21:36,701 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:21:36,701 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:21:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:21:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash 31123716, now seen corresponding path program 1 times [2019-11-24 04:21:36,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:21:36,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555201263] [2019-11-24 04:21:36,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:21:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:21:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:21:36,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555201263] [2019-11-24 04:21:36,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057970833] [2019-11-24 04:21:36,763 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 [2019-11-24 04:21:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:21:36,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-24 04:21:36,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:21:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:21:36,867 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:21:36,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:21:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:21:36,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437216517] [2019-11-24 04:21:36,906 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:21:36,907 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:21:36,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:21:36,921 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:21:36,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:21:37,860 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 190 [2019-11-24 04:21:38,024 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 173 [2019-11-24 04:21:38,299 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 258 [2019-11-24 04:21:38,525 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 246 [2019-11-24 04:21:38,934 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 389 [2019-11-24 04:21:39,352 WARN L192 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 359 [2019-11-24 04:21:40,230 WARN L192 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 644 [2019-11-24 04:21:40,888 WARN L192 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 612 [2019-11-24 04:21:42,361 WARN L192 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 1164 DAG size of output: 1052 [2019-11-24 04:21:43,692 WARN L192 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 1013 DAG size of output: 982 [2019-11-24 04:21:45,030 WARN L192 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 962 DAG size of output: 960 [2019-11-24 04:21:46,223 WARN L192 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 957 DAG size of output: 903 [2019-11-24 04:21:47,487 WARN L192 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 884 DAG size of output: 866 [2019-11-24 04:21:48,273 WARN L192 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 851 DAG size of output: 843 [2019-11-24 04:21:51,707 WARN L192 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 1676 DAG size of output: 1484 [2019-11-24 04:21:54,094 WARN L192 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 1431 DAG size of output: 1374 [2019-11-24 04:22:01,285 WARN L192 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 2738 DAG size of output: 2551 [2019-11-24 04:22:07,585 WARN L192 SmtUtils]: Spent 5.93 s on a formula simplification. DAG size of input: 2496 DAG size of output: 2397 [2019-11-24 04:22:32,651 WARN L192 SmtUtils]: Spent 23.78 s on a formula simplification. DAG size of input: 5297 DAG size of output: 4900 [2019-11-24 04:22:57,433 WARN L192 SmtUtils]: Spent 23.95 s on a formula simplification. DAG size of input: 4791 DAG size of output: 4604