/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_vector_difference_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:17:16,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:17:16,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:17:16,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:17:16,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:17:16,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:17:16,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:17:16,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:17:16,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:17:16,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:17:16,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:17:16,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:17:16,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:17:16,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:17:16,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:17:16,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:17:16,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:17:16,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:17:16,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:17:16,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:17:16,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:17:16,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:17:16,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:17:16,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:17:16,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:17:16,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:17:16,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:17:16,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:17:16,927 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 23:17:16,942 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:17:16,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:17:16,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:17:16,943 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:17:16,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:17:16,944 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:17:16,944 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:17:16,944 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:17:16,944 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:17:16,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:17:16,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:17:16,945 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:17:16,945 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:17:16,945 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:17:16,946 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:17:16,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:17:16,947 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:17:16,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:17:16,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:17:16,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:17:16,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:17:16,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:17:16,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:17:16,948 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:17:16,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:17:16,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:17:16,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:17:16,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:17:16,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:17:16,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:17:16,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:17:16,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:17:16,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:17:16,950 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:17:16,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:17:16,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:17:16,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:17:16,951 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:17:17,231 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:17:17,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:17:17,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:17:17,249 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:17:17,249 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:17:17,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i [2019-11-23 23:17:17,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/127a0355d/7892534925e843aa958108b5d243fa14/FLAG5cce1db43 [2019-11-23 23:17:17,756 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:17:17,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i [2019-11-23 23:17:17,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/127a0355d/7892534925e843aa958108b5d243fa14/FLAG5cce1db43 [2019-11-23 23:17:18,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/127a0355d/7892534925e843aa958108b5d243fa14 [2019-11-23 23:17:18,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:17:18,134 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:17:18,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:18,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:17:18,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:17:18,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@86b5b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18, skipping insertion in model container [2019-11-23 23:17:18,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:17:18,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:17:18,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:18,355 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:17:18,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:18,396 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:17:18,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18 WrapperNode [2019-11-23 23:17:18,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:18,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:18,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:17:18,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:17:18,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:18,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:17:18,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:17:18,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:17:18,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (1/1) ... [2019-11-23 23:17:18,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:17:18,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:17:18,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:17:18,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:17:18,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (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 23:17:18,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:17:18,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:17:18,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:17:18,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:17:18,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:17:18,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:17:18,974 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:17:18,974 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:17:18,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:18 BoogieIcfgContainer [2019-11-23 23:17:18,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:17:18,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:17:18,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:17:18,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:17:18,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:17:18" (1/3) ... [2019-11-23 23:17:18,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ea9be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:18, skipping insertion in model container [2019-11-23 23:17:18,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:18" (2/3) ... [2019-11-23 23:17:18,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ea9be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:18, skipping insertion in model container [2019-11-23 23:17:18,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:18" (3/3) ... [2019-11-23 23:17:18,984 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_vector_difference_ground.i [2019-11-23 23:17:18,993 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:17:19,000 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:17:19,011 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:17:19,033 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:17:19,033 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:17:19,033 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:17:19,033 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:17:19,033 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:17:19,033 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:17:19,033 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:17:19,034 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:17:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:17:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:17:19,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:19,051 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:17:19,052 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1713659471, now seen corresponding path program 1 times [2019-11-23 23:17:19,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:19,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486770463] [2019-11-23 23:17:19,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:19,217 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 23:17:19,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486770463] [2019-11-23 23:17:19,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:17:19,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:17:19,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995292071] [2019-11-23 23:17:19,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:17:19,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:17:19,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:17:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:17:19,236 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:17:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:17:19,294 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2019-11-23 23:17:19,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:17:19,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:17:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:17:19,304 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:17:19,305 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:17:19,308 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 23:17:19,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:17:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:17:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:17:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-23 23:17:19,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2019-11-23 23:17:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:17:19,341 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-23 23:17:19,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:17:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-23 23:17:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:17:19,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:19,342 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:17:19,343 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1457492963, now seen corresponding path program 1 times [2019-11-23 23:17:19,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:19,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676237151] [2019-11-23 23:17:19,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:19,431 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 23:17:19,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676237151] [2019-11-23 23:17:19,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803018604] [2019-11-23 23:17:19,432 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 23:17:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:19,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:17:19,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:17:19,538 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 23:17:19,539 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:17:19,559 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 23:17:19,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1967283540] [2019-11-23 23:17:19,585 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:17:19,585 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:17:19,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:17:19,599 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:17:19,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:17:21,635 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 155 [2019-11-23 23:17:21,757 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 155 [2019-11-23 23:17:22,799 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2019-11-23 23:17:22,922 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 174 [2019-11-23 23:17:23,113 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-11-23 23:17:23,226 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 182 [2019-11-23 23:17:23,483 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 186 [2019-11-23 23:17:25,433 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 202 [2019-11-23 23:17:27,703 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 207 [2019-11-23 23:17:30,436 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 214 [2019-11-23 23:17:33,198 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 216 [2019-11-23 23:17:33,400 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-23 23:17:33,631 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 201 [2019-11-23 23:17:36,102 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 221 [2019-11-23 23:17:36,335 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 203 [2019-11-23 23:17:36,544 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2019-11-23 23:17:36,703 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 205 [2019-11-23 23:17:39,325 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 226 [2019-11-23 23:17:42,058 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 230 [2019-11-23 23:17:44,909 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 232 [2019-11-23 23:17:48,060 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 240 [2019-11-23 23:17:51,154 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2019-11-23 23:17:54,244 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 245 [2019-11-23 23:17:57,340 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 246 [2019-11-23 23:18:00,457 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 252 [2019-11-23 23:18:00,597 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2019-11-23 23:18:03,813 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 254 [2019-11-23 23:18:07,193 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 258 [2019-11-23 23:18:10,560 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 259 [2019-11-23 23:18:14,437 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 269 [2019-11-23 23:18:18,281 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 271 [2019-11-23 23:18:22,232 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 272 [2019-11-23 23:18:26,152 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-23 23:18:30,110 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 280 [2019-11-23 23:18:34,334 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 282 [2019-11-23 23:18:38,492 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 285 [2019-11-23 23:18:42,851 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 289 [2019-11-23 23:18:47,031 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 292