/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/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:20:09,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:20:09,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:20:09,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:20:09,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:20:09,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:20:09,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:20:09,382 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 04:20:09,419 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:20:09,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:20:09,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:20:09,421 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:20:09,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:20:09,424 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:20:09,424 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:20:09,424 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:20:09,424 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:20:09,424 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:20:09,424 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:20:09,425 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:20:09,425 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:20:09,425 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:20:09,425 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:20:09,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:20:09,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:20:09,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:20:09,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:20:09,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:20:09,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:20:09,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:20:09,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:20:09,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:20:09,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:20:09,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:20:09,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:20:09,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:20:09,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:20:09,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:20:09,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:20:09,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:20:09,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:20:09,431 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:20:09,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:20:09,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:20:09,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:20:09,432 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:20:09,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:20:09,714 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:20:09,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:20:09,719 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:20:09,719 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:20:09,719 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2019-11-24 04:20:09,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d9fb2a1/6675b752c02949878a6c79d9fe8e4618/FLAG9caad6c29 [2019-11-24 04:20:10,207 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:20:10,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2019-11-24 04:20:10,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d9fb2a1/6675b752c02949878a6c79d9fe8e4618/FLAG9caad6c29 [2019-11-24 04:20:10,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d9fb2a1/6675b752c02949878a6c79d9fe8e4618 [2019-11-24 04:20:10,618 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:20:10,620 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:20:10,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:20:10,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:20:10,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:20:10,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:10,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254d4563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10, skipping insertion in model container [2019-11-24 04:20:10,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:10,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:20:10,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:20:10,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:20:10,864 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:20:10,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:20:10,891 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:20:10,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10 WrapperNode [2019-11-24 04:20:10,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:20:10,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:20:10,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:20:10,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:20:10,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:10,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:10,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:20:10,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:20:10,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:20:10,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:20:11,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:11,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:11,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:11,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:11,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:11,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:11,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (1/1) ... [2019-11-24 04:20:11,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:20:11,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:20:11,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:20:11,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:20:11,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (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 04:20:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:20:11,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:20:11,280 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:20:11,281 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:20:11,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:20:11 BoogieIcfgContainer [2019-11-24 04:20:11,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:20:11,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:20:11,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:20:11,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:20:11,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:20:10" (1/3) ... [2019-11-24 04:20:11,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c64c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:20:11, skipping insertion in model container [2019-11-24 04:20:11,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:10" (2/3) ... [2019-11-24 04:20:11,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c64c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:20:11, skipping insertion in model container [2019-11-24 04:20:11,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:20:11" (3/3) ... [2019-11-24 04:20:11,299 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2019-11-24 04:20:11,317 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:20:11,328 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:20:11,356 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:20:11,385 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:20:11,385 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:20:11,386 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:20:11,386 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:20:11,386 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:20:11,386 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:20:11,386 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:20:11,386 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:20:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-24 04:20:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:20:11,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:20:11,411 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:20:11,411 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:20:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:20:11,417 INFO L82 PathProgramCache]: Analyzing trace with hash 29766720, now seen corresponding path program 1 times [2019-11-24 04:20:11,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:20:11,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686968095] [2019-11-24 04:20:11,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:20:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:11,545 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 04:20:11,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686968095] [2019-11-24 04:20:11,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:20:11,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:20:11,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692595243] [2019-11-24 04:20:11,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:20:11,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:20:11,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:20:11,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:20:11,571 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-24 04:20:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:20:11,612 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-11-24 04:20:11,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:20:11,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-24 04:20:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:20:11,624 INFO L225 Difference]: With dead ends: 16 [2019-11-24 04:20:11,625 INFO L226 Difference]: Without dead ends: 7 [2019-11-24 04:20:11,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:20:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-24 04:20:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-24 04:20:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 04:20:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-24 04:20:11,670 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-24 04:20:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:20:11,671 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-24 04:20:11,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:20:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-24 04:20:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:20:11,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:20:11,673 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:20:11,673 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:20:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:20:11,674 INFO L82 PathProgramCache]: Analyzing trace with hash 922156125, now seen corresponding path program 1 times [2019-11-24 04:20:11,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:20:11,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821146291] [2019-11-24 04:20:11,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:20:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:11,875 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 04:20:11,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821146291] [2019-11-24 04:20:11,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131921650] [2019-11-24 04:20:11,876 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 04:20:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:11,910 WARN L253 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-24 04:20:11,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:20:12,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:20:12,061 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 04:20:12,061 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:20:12,144 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 04:20:12,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281478482] [2019-11-24 04:20:12,170 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-24 04:20:12,171 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:20:12,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:20:12,184 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:20:12,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:20:13,345 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 282 [2019-11-24 04:20:13,502 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 282 [2019-11-24 04:20:13,670 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2019-11-24 04:20:13,781 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 285 [2019-11-24 04:20:13,994 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 361 [2019-11-24 04:20:14,202 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 361 [2019-11-24 04:20:14,544 WARN L192 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 445 [2019-11-24 04:20:14,978 WARN L192 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 444 [2019-11-24 04:20:15,460 WARN L192 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 526 [2019-11-24 04:20:15,988 WARN L192 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 525 [2019-11-24 04:20:16,613 WARN L192 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 658 DAG size of output: 653 [2019-11-24 04:20:17,521 WARN L192 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 653 DAG size of output: 650 [2019-11-24 04:20:18,467 WARN L192 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 800 [2019-11-24 04:20:19,684 WARN L192 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 800 DAG size of output: 797 [2019-11-24 04:20:21,286 WARN L192 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 990 DAG size of output: 972 [2019-11-24 04:20:23,050 WARN L192 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 971 DAG size of output: 968 [2019-11-24 04:20:25,513 WARN L192 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 1191 DAG size of output: 1174 [2019-11-24 04:20:28,358 WARN L192 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 1172 DAG size of output: 1169 [2019-11-24 04:20:31,523 WARN L192 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 1171 [2019-11-24 04:20:34,098 WARN L192 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 1172 DAG size of output: 1171 [2019-11-24 04:20:37,223 WARN L192 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 1173 [2019-11-24 04:20:39,775 WARN L192 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 1174 DAG size of output: 1173 [2019-11-24 04:20:42,835 WARN L192 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 1175 [2019-11-24 04:20:45,244 WARN L192 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 1176 DAG size of output: 1175 [2019-11-24 04:20:48,253 WARN L192 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 1177 [2019-11-24 04:20:50,639 WARN L192 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 1178 DAG size of output: 1177 [2019-11-24 04:20:53,651 WARN L192 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 1179 [2019-11-24 04:20:56,023 WARN L192 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 1180 DAG size of output: 1179 [2019-11-24 04:20:58,990 WARN L192 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 1183 [2019-11-24 04:21:01,333 WARN L192 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 1184 DAG size of output: 1183 [2019-11-24 04:21:04,295 WARN L192 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 1187 [2019-11-24 04:21:06,673 WARN L192 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 1188 DAG size of output: 1187 [2019-11-24 04:21:09,630 WARN L192 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 1191 [2019-11-24 04:21:12,037 WARN L192 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 1192 DAG size of output: 1191 [2019-11-24 04:21:15,030 WARN L192 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 1195 [2019-11-24 04:21:17,440 WARN L192 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 1196 DAG size of output: 1195 [2019-11-24 04:21:20,367 WARN L192 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 1199 [2019-11-24 04:21:22,822 WARN L192 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 1200 DAG size of output: 1199 [2019-11-24 04:21:25,794 WARN L192 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 1203 [2019-11-24 04:21:28,295 WARN L192 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 1204 DAG size of output: 1203 [2019-11-24 04:21:31,312 WARN L192 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 1207 [2019-11-24 04:21:33,771 WARN L192 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 1208 DAG size of output: 1207 [2019-11-24 04:21:36,794 WARN L192 SmtUtils]: Spent 2.43 s on a formula simplification that was a NOOP. DAG size: 1211 [2019-11-24 04:21:39,217 WARN L192 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 1212 DAG size of output: 1211 [2019-11-24 04:21:42,185 WARN L192 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 1216 [2019-11-24 04:21:44,609 WARN L192 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 1217 DAG size of output: 1216 [2019-11-24 04:21:47,543 WARN L192 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 1221 [2019-11-24 04:21:49,980 WARN L192 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1222 DAG size of output: 1221 [2019-11-24 04:21:53,036 WARN L192 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 1226