./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gj2007b.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-lit/gj2007b.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1e17546c38a51643b6e392ce04436e766214299e .................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:06:43,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:06:43,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:06:43,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:06:43,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:06:43,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:06:43,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:06:43,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:06:43,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:06:43,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:06:43,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:06:43,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:06:43,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:06:43,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:06:43,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:06:43,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:06:43,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:06:43,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:06:43,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:06:43,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:06:43,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:06:43,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:06:43,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:06:43,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:06:43,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:06:43,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:06:43,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:06:43,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:06:43,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:06:43,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:06:43,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:06:43,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:06:43,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:06:43,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:06:43,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:06:43,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:06:43,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:06:43,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:06:43,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:06:43,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:06:43,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:06:43,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:06:43,284 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:06:43,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:06:43,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:06:43,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:06:43,288 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:06:43,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:06:43,289 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:06:43,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:06:43,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:06:43,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:06:43,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:06:43,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:06:43,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:06:43,291 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:06:43,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:06:43,291 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:06:43,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:06:43,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:06:43,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:06:43,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:06:43,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:06:43,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:06:43,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:06:43,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:06:43,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:06:43,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:06:43,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:06:43,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:06:43,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:06:43,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e17546c38a51643b6e392ce04436e766214299e [2019-11-28 17:06:43,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:06:43,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:06:43,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:06:43,609 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:06:43,609 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:06:43,610 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gj2007b.i [2019-11-28 17:06:43,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a95609f/a3822027eaad4d488aba382fb16750bf/FLAGd8af86ec4 [2019-11-28 17:06:44,133 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:06:44,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007b.i [2019-11-28 17:06:44,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a95609f/a3822027eaad4d488aba382fb16750bf/FLAGd8af86ec4 [2019-11-28 17:06:44,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a95609f/a3822027eaad4d488aba382fb16750bf [2019-11-28 17:06:44,528 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:06:44,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:06:44,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:06:44,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:06:44,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:06:44,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@576f60af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44, skipping insertion in model container [2019-11-28 17:06:44,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:06:44,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:06:44,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:06:44,745 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:06:44,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:06:44,777 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:06:44,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44 WrapperNode [2019-11-28 17:06:44,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:06:44,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:06:44,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:06:44,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:06:44,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:06:44,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:06:44,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:06:44,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:06:44,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (1/1) ... [2019-11-28 17:06:44,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:06:44,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:06:44,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:06:44,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:06:44,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (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 [2019-11-28 17:06:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:06:44,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:06:45,113 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:06:45,113 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-28 17:06:45,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:06:45 BoogieIcfgContainer [2019-11-28 17:06:45,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:06:45,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:06:45,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:06:45,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:06:45,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:06:44" (1/3) ... [2019-11-28 17:06:45,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f157595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:06:45, skipping insertion in model container [2019-11-28 17:06:45,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:06:44" (2/3) ... [2019-11-28 17:06:45,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f157595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:06:45, skipping insertion in model container [2019-11-28 17:06:45,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:06:45" (3/3) ... [2019-11-28 17:06:45,123 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2019-11-28 17:06:45,133 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:06:45,144 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-28 17:06:45,156 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-28 17:06:45,181 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:06:45,181 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:06:45,182 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:06:45,182 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:06:45,182 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:06:45,182 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:06:45,182 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:06:45,183 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:06:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-28 17:06:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:06:45,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:06:45,200 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:06:45,200 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:06:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:06:45,206 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2019-11-28 17:06:45,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:06:45,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959442390] [2019-11-28 17:06:45,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:06:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:06:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:06:45,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959442390] [2019-11-28 17:06:45,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:06:45,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 17:06:45,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95746271] [2019-11-28 17:06:45,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 17:06:45,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:06:45,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 17:06:45,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 17:06:45,337 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-11-28 17:06:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:06:45,355 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2019-11-28 17:06:45,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 17:06:45,357 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-28 17:06:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:06:45,366 INFO L225 Difference]: With dead ends: 28 [2019-11-28 17:06:45,367 INFO L226 Difference]: Without dead ends: 12 [2019-11-28 17:06:45,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 17:06:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-28 17:06:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-28 17:06:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-28 17:06:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-28 17:06:45,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2019-11-28 17:06:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:06:45,403 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-28 17:06:45,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 17:06:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-28 17:06:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:06:45,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:06:45,404 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:06:45,404 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:06:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:06:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2019-11-28 17:06:45,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:06:45,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932195307] [2019-11-28 17:06:45,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:06:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:06:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:06:45,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932195307] [2019-11-28 17:06:45,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:06:45,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 17:06:45,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824225434] [2019-11-28 17:06:45,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:06:45,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:06:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:06:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:06:45,470 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2019-11-28 17:06:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:06:45,629 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-28 17:06:45,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:06:45,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-28 17:06:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:06:45,630 INFO L225 Difference]: With dead ends: 23 [2019-11-28 17:06:45,630 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 17:06:45,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:06:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 17:06:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2019-11-28 17:06:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:06:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-28 17:06:45,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 5 [2019-11-28 17:06:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:06:45,641 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-28 17:06:45,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:06:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-28 17:06:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 17:06:45,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:06:45,642 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:06:45,643 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:06:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:06:45,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1415330318, now seen corresponding path program 1 times [2019-11-28 17:06:45,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:06:45,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818228371] [2019-11-28 17:06:45,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:06:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:06:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:06:45,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818228371] [2019-11-28 17:06:45,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:06:45,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 17:06:45,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537592631] [2019-11-28 17:06:45,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:06:45,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:06:45,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:06:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:06:45,713 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-28 17:06:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:06:45,792 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-28 17:06:45,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:06:45,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-28 17:06:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:06:45,794 INFO L225 Difference]: With dead ends: 27 [2019-11-28 17:06:45,795 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 17:06:45,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:06:45,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 17:06:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-11-28 17:06:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 17:06:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-28 17:06:45,801 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2019-11-28 17:06:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:06:45,802 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-28 17:06:45,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:06:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-28 17:06:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 17:06:45,803 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:06:45,804 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:06:45,804 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:06:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:06:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash 608596189, now seen corresponding path program 1 times [2019-11-28 17:06:45,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:06:45,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862701560] [2019-11-28 17:06:45,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:06:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:06:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:06:45,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862701560] [2019-11-28 17:06:45,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201341694] [2019-11-28 17:06:45,863 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 [2019-11-28 17:06:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:06:45,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:06:45,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:06:45,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:06:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:06:45,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:06:45,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-28 17:06:45,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314750363] [2019-11-28 17:06:45,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:06:45,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:06:45,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:06:45,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:06:45,966 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2019-11-28 17:06:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:06:46,028 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-11-28 17:06:46,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:06:46,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-28 17:06:46,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:06:46,030 INFO L225 Difference]: With dead ends: 18 [2019-11-28 17:06:46,031 INFO L226 Difference]: Without dead ends: 16 [2019-11-28 17:06:46,031 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:06:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-28 17:06:46,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2019-11-28 17:06:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 17:06:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-28 17:06:46,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-11-28 17:06:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:06:46,038 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-28 17:06:46,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:06:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-28 17:06:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 17:06:46,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:06:46,041 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:06:46,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:06:46,246 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:06:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:06:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash 745541216, now seen corresponding path program 1 times [2019-11-28 17:06:46,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:06:46,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581100331] [2019-11-28 17:06:46,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:06:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:06:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:06:46,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581100331] [2019-11-28 17:06:46,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637802052] [2019-11-28 17:06:46,328 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) [2019-11-28 17:06:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:06:46,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 17:06:46,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:06:46,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:06:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:06:46,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:06:46,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2019-11-28 17:06:46,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186874596] [2019-11-28 17:06:46,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:06:46,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:06:46,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:06:46,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:06:46,476 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 11 states. [2019-11-28 17:06:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:06:46,826 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-11-28 17:06:46,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 17:06:46,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2019-11-28 17:06:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:06:46,827 INFO L225 Difference]: With dead ends: 28 [2019-11-28 17:06:46,827 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:06:46,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:06:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:06:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:06:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:06:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:06:46,830 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-11-28 17:06:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:06:46,830 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:06:46,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:06:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:06:46,831 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:06:47,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:06:47,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:06:47,188 INFO L246 CegarLoopResult]: For program point L4-3(lines 4 6) no Hoare annotation was computed. [2019-11-28 17:06:47,188 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:06:47,188 INFO L249 CegarLoopResult]: At program point L4-5(lines 3 8) the Hoare annotation is: true [2019-11-28 17:06:47,188 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-28 17:06:47,189 INFO L246 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-28 17:06:47,189 INFO L246 CegarLoopResult]: For program point L15-2(lines 15 17) no Hoare annotation was computed. [2019-11-28 17:06:47,189 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-28 17:06:47,189 INFO L246 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2019-11-28 17:06:47,189 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:06:47,189 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:06:47,189 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-28 17:06:47,190 INFO L249 CegarLoopResult]: At program point L22(lines 10 23) the Hoare annotation is: true [2019-11-28 17:06:47,190 INFO L242 CegarLoopResult]: At program point L14-2(lines 14 19) the Hoare annotation is: (let ((.cse0 (<= 0 ULTIMATE.start_main_~m~0)) (.cse1 (<= 0 ULTIMATE.start_main_~x~0))) (or (and (<= ULTIMATE.start_main_~m~0 0) .cse0 .cse1) (and .cse0 (< ULTIMATE.start_main_~m~0 ULTIMATE.start_main_~n~0) .cse1))) [2019-11-28 17:06:47,190 INFO L246 CegarLoopResult]: For program point L14-3(lines 14 19) no Hoare annotation was computed. [2019-11-28 17:06:47,190 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-28 17:06:47,191 INFO L242 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: (let ((.cse0 (<= 0 ULTIMATE.start_main_~m~0)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 0 ULTIMATE.start_main_~x~0))) (or (and .cse0 .cse1 (< ULTIMATE.start_main_~m~0 ULTIMATE.start_main_~n~0) .cse2) (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= ULTIMATE.start_main_~x~0 0) (<= ULTIMATE.start_main_~n~0 0)) (and (<= ULTIMATE.start_main_~m~0 0) .cse0 .cse1 .cse2))) [2019-11-28 17:06:47,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:06:47 BoogieIcfgContainer [2019-11-28 17:06:47,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:06:47,210 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:06:47,211 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:06:47,211 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:06:47,211 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:06:45" (3/4) ... [2019-11-28 17:06:47,217 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:06:47,227 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:06:47,227 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:06:47,272 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:06:47,272 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:06:47,274 INFO L168 Benchmark]: Toolchain (without parser) took 2744.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 961.7 MB in the beginning and 978.4 MB in the end (delta: -16.7 MB). Peak memory consumption was 121.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:06:47,275 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:06:47,276 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.82 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:06:47,276 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -184.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:06:47,277 INFO L168 Benchmark]: Boogie Preprocessor took 17.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:06:47,277 INFO L168 Benchmark]: RCFGBuilder took 231.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:06:47,278 INFO L168 Benchmark]: TraceAbstraction took 2093.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 978.4 MB in the end (delta: 136.6 MB). Peak memory consumption was 136.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:06:47,279 INFO L168 Benchmark]: Witness Printer took 61.89 ms. Allocated memory is still 1.2 GB. Free memory is still 978.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:06:47,282 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 248.82 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 85.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -184.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 231.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2093.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 978.4 MB in the end (delta: 136.6 MB). Peak memory consumption was 136.6 MB. Max. memory is 11.5 GB. * Witness Printer took 61.89 ms. Allocated memory is still 1.2 GB. Free memory is still 978.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((m <= 0 && 0 <= m) && 0 <= x) || ((0 <= m && m < n) && 0 <= x) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: ((((0 <= m && 1 == cond) && m < n) && 0 <= x) || ((!(0 == cond) && x <= 0) && n <= 0)) || (((m <= 0 && 0 <= m) && 1 == cond) && 0 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Result: SAFE, OverallTime: 1.8s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 41 SDtfs, 72 SDslu, 50 SDs, 0 SdLazy, 107 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 13 NumberOfFragments, 61 HoareAnnotationTreeSize, 4 FomulaSimplifications, 98 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 1209 SizeOfPredicates, 12 NumberOfNonLiveVariables, 57 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...