/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-crafted/mapavg4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:53:25,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:53:25,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:53:25,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:53:25,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:53:25,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:53:25,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:53:25,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:53:25,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:53:25,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:53:25,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:53:25,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:53:25,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:53:25,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:53:25,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:53:25,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:53:25,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:53:25,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:53:25,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:53:25,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:53:25,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:53:25,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:53:25,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:53:25,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:53:25,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:53:25,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:53:25,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:53:25,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:53:25,206 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 22:53:25,230 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:53:25,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:53:25,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:53:25,233 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:53:25,233 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:53:25,233 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:53:25,233 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:53:25,234 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:53:25,234 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:53:25,234 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:53:25,234 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:53:25,234 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:53:25,234 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:53:25,236 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:53:25,236 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:53:25,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:53:25,237 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:53:25,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:53:25,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:53:25,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:53:25,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:53:25,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:53:25,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:53:25,238 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:53:25,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:53:25,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:53:25,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:53:25,239 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:53:25,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:53:25,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:53:25,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:53:25,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:53:25,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:53:25,241 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:53:25,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:53:25,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:53:25,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:53:25,242 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:53:25,512 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:53:25,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:53:25,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:53:25,539 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:53:25,539 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:53:25,540 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg4.i [2019-11-23 22:53:25,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f74620324/a79bd48f5f5c410db184fbb18631b164/FLAGbcdfdad7a [2019-11-23 22:53:26,080 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:53:26,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg4.i [2019-11-23 22:53:26,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f74620324/a79bd48f5f5c410db184fbb18631b164/FLAGbcdfdad7a [2019-11-23 22:53:26,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f74620324/a79bd48f5f5c410db184fbb18631b164 [2019-11-23 22:53:26,430 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:53:26,432 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:53:26,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:53:26,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:53:26,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:53:26,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8b9bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26, skipping insertion in model container [2019-11-23 22:53:26,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:53:26,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:53:26,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:53:26,674 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:53:26,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:53:26,717 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:53:26,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26 WrapperNode [2019-11-23 22:53:26,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:53:26,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:53:26,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:53:26,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:53:26,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:53:26,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:53:26,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:53:26,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:53:26,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:53:26,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:53:26,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:53:26,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:53:26,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (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 22:53:26,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:53:26,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:53:26,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:53:26,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:53:26,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:53:26,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:53:27,450 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:53:27,451 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:53:27,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:53:27 BoogieIcfgContainer [2019-11-23 22:53:27,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:53:27,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:53:27,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:53:27,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:53:27,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:53:26" (1/3) ... [2019-11-23 22:53:27,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e3dcbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:53:27, skipping insertion in model container [2019-11-23 22:53:27,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (2/3) ... [2019-11-23 22:53:27,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e3dcbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:53:27, skipping insertion in model container [2019-11-23 22:53:27,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:53:27" (3/3) ... [2019-11-23 22:53:27,460 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg4.i [2019-11-23 22:53:27,470 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:53:27,483 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:53:27,498 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:53:27,522 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:53:27,522 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:53:27,522 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:53:27,522 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:53:27,522 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:53:27,522 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:53:27,523 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:53:27,523 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:53:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:53:27,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:53:27,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:53:27,546 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:53:27,547 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:53:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:53:27,554 INFO L82 PathProgramCache]: Analyzing trace with hash -977729615, now seen corresponding path program 1 times [2019-11-23 22:53:27,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:53:27,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286633222] [2019-11-23 22:53:27,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:53:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:27,719 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 22:53:27,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286633222] [2019-11-23 22:53:27,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:53:27,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:53:27,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112292816] [2019-11-23 22:53:27,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:53:27,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:53:27,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:53:27,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:53:27,740 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 22:53:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:53:27,774 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 22:53:27,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:53:27,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:53:27,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:53:27,789 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:53:27,789 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:53:27,796 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 22:53:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:53:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:53:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:53:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-23 22:53:27,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-23 22:53:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:53:27,854 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-23 22:53:27,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:53:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-23 22:53:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:53:27,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:53:27,856 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:53:27,856 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:53:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:53:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1165895748, now seen corresponding path program 1 times [2019-11-23 22:53:27,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:53:27,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473183497] [2019-11-23 22:53:27,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:53:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:53:27,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473183497] [2019-11-23 22:53:27,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252352180] [2019-11-23 22:53:27,983 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 22:53:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:28,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:53:28,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:53:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:53:28,085 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:53:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:53:28,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:53:28,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:53:28,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590671413] [2019-11-23 22:53:28,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:53:28,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:53:28,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:53:28,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:53:28,102 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-23 22:53:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:53:28,160 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-23 22:53:28,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:53:28,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:53:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:53:28,161 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:53:28,162 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:53:28,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:53:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:53:28,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:53:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:53:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 22:53:28,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-23 22:53:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:53:28,168 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 22:53:28,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:53:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 22:53:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:53:28,169 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:53:28,169 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:53:28,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:53:28,375 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:53:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:53:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1510942468, now seen corresponding path program 1 times [2019-11-23 22:53:28,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:53:28,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74271929] [2019-11-23 22:53:28,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:53:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:53:28,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74271929] [2019-11-23 22:53:28,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442483870] [2019-11-23 22:53:28,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:53:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:28,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:53:28,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:53:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:53:28,542 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:53:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:53:28,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:53:28,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:53:28,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166235561] [2019-11-23 22:53:28,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:53:28,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:53:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:53:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:53:28,557 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-23 22:53:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:53:28,599 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 22:53:28,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:53:28,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:53:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:53:28,601 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:53:28,601 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:53:28,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:53:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:53:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:53:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:53:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 22:53:28,611 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-23 22:53:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:53:28,611 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 22:53:28,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:53:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 22:53:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:53:28,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:53:28,613 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:53:28,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:53:28,817 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:53:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:53:28,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1316778556, now seen corresponding path program 1 times [2019-11-23 22:53:28,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:53:28,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706746440] [2019-11-23 22:53:28,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:53:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:53:28,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706746440] [2019-11-23 22:53:28,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107904380] [2019-11-23 22:53:28,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:53:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:28,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:53:28,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:53:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:53:28,943 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:53:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:53:28,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374322067] [2019-11-23 22:53:29,008 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 22:53:29,008 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:53:29,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:53:29,021 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:53:29,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:54:01,915 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 257 [2019-11-23 22:54:14,239 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 286 [2019-11-23 22:54:29,133 WARN L192 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 317 [2019-11-23 22:54:29,365 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 316 [2019-11-23 22:54:31,752 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2019-11-23 22:54:31,997 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 321 [2019-11-23 22:54:37,013 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 325 [2019-11-23 22:54:39,160 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 327 [2019-11-23 22:54:41,604 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 334 [2019-11-23 22:54:44,179 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 338 [2019-11-23 22:54:46,617 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 340 [2019-11-23 22:54:46,749 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2019-11-23 22:54:49,224 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 350 [2019-11-23 22:54:49,337 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 347 [2019-11-23 22:54:51,819 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 350 [2019-11-23 22:54:54,568 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 352 [2019-11-23 22:54:54,693 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2019-11-23 22:54:54,805 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 355 [2019-11-23 22:54:57,513 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2019-11-23 22:54:57,626 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 360