/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_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:12:31,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:12:31,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:12:31,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:12:31,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 23:12:31,294 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:12:31,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:12:31,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:12:31,297 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:12:31,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:12:31,297 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:12:31,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:12:31,298 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:12:31,298 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:12:31,298 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:12:31,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:12:31,299 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:12:31,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:12:31,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:12:31,300 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:12:31,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:12:31,301 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:12:31,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:12:31,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:12:31,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:12:31,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:12:31,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:12:31,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:12:31,303 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:12:31,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:12:31,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:12:31,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:12:31,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:12:31,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:12:31,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:12:31,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:12:31,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:12:31,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:12:31,305 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:12:31,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:12:31,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:12:31,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:12:31,307 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:12:31,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:12:31,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:12:31,610 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:12:31,612 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:12:31,612 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:12:31,613 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2019-11-23 23:12:31,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a84b58db/062287e88df64e4c847d53719262e012/FLAG2757e5f30 [2019-11-23 23:12:32,027 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:12:32,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2019-11-23 23:12:32,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a84b58db/062287e88df64e4c847d53719262e012/FLAG2757e5f30 [2019-11-23 23:12:32,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a84b58db/062287e88df64e4c847d53719262e012 [2019-11-23 23:12:32,425 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:12:32,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:12:32,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:12:32,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:12:32,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:12:32,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e50c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32, skipping insertion in model container [2019-11-23 23:12:32,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:12:32,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:12:32,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:12:32,619 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:12:32,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:12:32,659 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:12:32,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32 WrapperNode [2019-11-23 23:12:32,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:12:32,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:12:32,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:12:32,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:12:32,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:12:32,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:12:32,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:12:32,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:12:32,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... [2019-11-23 23:12:32,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:12:32,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:12:32,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:12:32,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:12:32,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:12:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:12:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:12:32,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:12:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:12:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:12:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:12:33,405 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:12:33,405 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 23:12:33,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:12:33 BoogieIcfgContainer [2019-11-23 23:12:33,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:12:33,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:12:33,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:12:33,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:12:33,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:12:32" (1/3) ... [2019-11-23 23:12:33,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c87db2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:12:33, skipping insertion in model container [2019-11-23 23:12:33,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:32" (2/3) ... [2019-11-23 23:12:33,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c87db2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:12:33, skipping insertion in model container [2019-11-23 23:12:33,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:12:33" (3/3) ... [2019-11-23 23:12:33,414 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2019-11-23 23:12:33,424 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:12:33,432 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 23:12:33,443 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 23:12:33,464 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:12:33,464 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:12:33,465 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:12:33,465 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:12:33,465 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:12:33,465 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:12:33,465 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:12:33,465 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:12:33,481 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-23 23:12:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:12:33,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:33,488 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:12:33,488 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:33,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash -818553127, now seen corresponding path program 1 times [2019-11-23 23:12:33,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:33,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382880258] [2019-11-23 23:12:33,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:12:33,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382880258] [2019-11-23 23:12:33,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:12:33,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:12:33,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062850930] [2019-11-23 23:12:33,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:12:33,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:12:33,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:12:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:12:33,686 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2019-11-23 23:12:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:12:33,728 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2019-11-23 23:12:33,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:12:33,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:12:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:12:33,740 INFO L225 Difference]: With dead ends: 28 [2019-11-23 23:12:33,741 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 23:12:33,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:12:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 23:12:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 23:12:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 23:12:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 23:12:33,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 6 [2019-11-23 23:12:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:12:33,784 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 23:12:33,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:12:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 23:12:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:12:33,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:33,785 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:12:33,786 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:33,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:33,786 INFO L82 PathProgramCache]: Analyzing trace with hash -969429596, now seen corresponding path program 1 times [2019-11-23 23:12:33,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:33,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032248982] [2019-11-23 23:12:33,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:33,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032248982] [2019-11-23 23:12:33,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412802508] [2019-11-23 23:12:33,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:12:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:33,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:12:33,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:12:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:33,957 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:12:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:33,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140317538] [2019-11-23 23:12:34,013 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:12:34,014 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:12:34,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:12:34,044 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:12:34,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:12:35,353 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 133 [2019-11-23 23:12:36,091 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 154 [2019-11-23 23:12:36,216 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 154 [2019-11-23 23:12:37,280 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 173 [2019-11-23 23:12:37,438 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2019-11-23 23:12:37,710 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 180 [2019-11-23 23:12:39,474 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 197 [2019-11-23 23:12:39,625 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-23 23:12:39,748 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 185 [2019-11-23 23:12:41,513 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2019-11-23 23:12:41,762 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 188 [2019-11-23 23:12:43,474 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2019-11-23 23:12:45,598 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2019-11-23 23:12:45,712 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 196 [2019-11-23 23:12:47,808 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-23 23:12:47,983 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 200 [2019-11-23 23:12:52,095 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 216 [2019-11-23 23:12:54,132 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2019-11-23 23:12:58,502 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 225 [2019-11-23 23:13:00,766 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2019-11-23 23:13:03,049 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2019-11-23 23:13:05,367 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2019-11-23 23:13:07,835 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2019-11-23 23:13:10,302 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2019-11-23 23:13:12,867 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2019-11-23 23:13:15,793 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 251 [2019-11-23 23:13:19,052 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 258 [2019-11-23 23:13:19,204 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 241 [2019-11-23 23:13:19,363 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 241 [2019-11-23 23:13:22,359 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 260 [2019-11-23 23:13:25,558 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 264 [2019-11-23 23:13:28,906 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 265 [2019-11-23 23:13:29,043 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2019-11-23 23:13:29,156 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 252 [2019-11-23 23:13:32,429 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 269 [2019-11-23 23:13:32,631 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 253 [2019-11-23 23:13:36,277 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 278 [2019-11-23 23:13:40,027 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2019-11-23 23:13:43,752 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 282 [2019-11-23 23:13:47,569 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 285 [2019-11-23 23:13:51,640 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 288 [2019-11-23 23:13:55,667 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 293 [2019-11-23 23:13:59,988 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 294 [2019-11-23 23:14:03,956 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 297