./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab 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-acceleration/underapprox_2-2.c -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 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 ............................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 00:01:17,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:01:17,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:01:17,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:01:17,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:01:17,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:01:17,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:01:17,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:01:17,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:01:17,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:01:17,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:01:17,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:01:17,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:01:17,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:01:17,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:01:17,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:01:17,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:01:17,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:01:17,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:01:17,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:01:17,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:01:17,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:01:17,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:01:17,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:01:17,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:01:17,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:01:17,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:01:17,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:01:17,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:01:17,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:01:17,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:01:17,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:01:17,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:01:17,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:01:17,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:01:17,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:01:17,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:01:17,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:01:17,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:01:17,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:01:17,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:01:17,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:01:17,296 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:01:17,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:01:17,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:01:17,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:01:17,301 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:01:17,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:01:17,301 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:01:17,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:01:17,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:01:17,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:01:17,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:01:17,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:01:17,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:01:17,303 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:01:17,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:01:17,303 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:01:17,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:01:17,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:01:17,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:01:17,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:01:17,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:01:17,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:01:17,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:01:17,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:01:17,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:01:17,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:01:17,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:01:17,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:01:17,306 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 -> 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 [2019-11-28 00:01:17,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:01:17,632 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:01:17,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:01:17,637 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:01:17,637 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:01:17,638 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-11-28 00:01:17,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb5da4d2/9a6c970f6fdc480cb9e677dcc728a5a2/FLAG694a7fd06 [2019-11-28 00:01:18,130 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:01:18,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-11-28 00:01:18,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb5da4d2/9a6c970f6fdc480cb9e677dcc728a5a2/FLAG694a7fd06 [2019-11-28 00:01:18,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb5da4d2/9a6c970f6fdc480cb9e677dcc728a5a2 [2019-11-28 00:01:18,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:01:18,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:01:18,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:01:18,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:01:18,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:01:18,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d7814e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18, skipping insertion in model container [2019-11-28 00:01:18,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:01:18,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:01:18,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:01:18,750 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:01:18,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:01:18,785 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:01:18,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18 WrapperNode [2019-11-28 00:01:18,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:01:18,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:01:18,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:01:18,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:01:18,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:01:18,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:01:18,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:01:18,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:01:18,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... [2019-11-28 00:01:18,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:01:18,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:01:18,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:01:18,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:01:18,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:01:18,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:01:18,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:01:19,151 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:01:19,151 INFO L297 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 00:01:19,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:01:19 BoogieIcfgContainer [2019-11-28 00:01:19,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:01:19,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:01:19,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:01:19,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:01:19,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:01:18" (1/3) ... [2019-11-28 00:01:19,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df4757e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:01:19, skipping insertion in model container [2019-11-28 00:01:19,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:01:18" (2/3) ... [2019-11-28 00:01:19,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df4757e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:01:19, skipping insertion in model container [2019-11-28 00:01:19,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:01:19" (3/3) ... [2019-11-28 00:01:19,162 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2019-11-28 00:01:19,171 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:01:19,176 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:01:19,186 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:01:19,207 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:01:19,207 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:01:19,207 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:01:19,207 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:01:19,207 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:01:19,208 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:01:19,208 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:01:19,208 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:01:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-28 00:01:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 00:01:19,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:01:19,224 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 00:01:19,225 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:01:19,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:01:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-11-28 00:01:19,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:01:19,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861928798] [2019-11-28 00:01:19,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:01:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:01:19,434 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 00:01:19,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861928798] [2019-11-28 00:01:19,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:01:19,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 00:01:19,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282410006] [2019-11-28 00:01:19,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 00:01:19,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:01:19,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 00:01:19,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 00:01:19,460 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-28 00:01:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:01:19,497 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-11-28 00:01:19,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 00:01:19,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-28 00:01:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:01:19,512 INFO L225 Difference]: With dead ends: 17 [2019-11-28 00:01:19,512 INFO L226 Difference]: Without dead ends: 7 [2019-11-28 00:01:19,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 00:01:19,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-28 00:01:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-28 00:01:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 00:01:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-28 00:01:19,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-28 00:01:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:01:19,552 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-28 00:01:19,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 00:01:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-28 00:01:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 00:01:19,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:01:19,553 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 00:01:19,553 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:01:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:01:19,554 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-11-28 00:01:19,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:01:19,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473862337] [2019-11-28 00:01:19,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:01:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:01:19,650 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 00:01:19,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473862337] [2019-11-28 00:01:19,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713255383] [2019-11-28 00:01:19,652 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 00:01:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:01:19,682 WARN L253 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 00:01:19,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:01:19,728 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 00:01:19,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:01:19,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-11-28 00:01:19,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948077419] [2019-11-28 00:01:19,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 00:01:19,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:01:19,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 00:01:19,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:01:19,733 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-11-28 00:01:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:01:19,760 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-28 00:01:19,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 00:01:19,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-28 00:01:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:01:19,761 INFO L225 Difference]: With dead ends: 12 [2019-11-28 00:01:19,761 INFO L226 Difference]: Without dead ends: 8 [2019-11-28 00:01:19,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:01:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-28 00:01:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-28 00:01:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 00:01:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-28 00:01:19,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-28 00:01:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:01:19,766 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-28 00:01:19,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 00:01:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-28 00:01:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 00:01:19,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:01:19,767 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-28 00:01:19,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:01:19,970 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:01:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:01:19,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-11-28 00:01:19,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:01:19,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466886879] [2019-11-28 00:01:19,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:01:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:01:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 00:01:20,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466886879] [2019-11-28 00:01:20,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238808334] [2019-11-28 00:01:20,075 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-28 00:01:20,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:01:20,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:01:20,107 WARN L253 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 00:01:20,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:01:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 00:01:20,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:01:20,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-28 00:01:20,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614287486] [2019-11-28 00:01:20,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 00:01:20,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:01:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 00:01:20,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-28 00:01:20,132 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-11-28 00:01:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:01:20,165 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-28 00:01:20,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:01:20,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-28 00:01:20,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:01:20,167 INFO L225 Difference]: With dead ends: 13 [2019-11-28 00:01:20,167 INFO L226 Difference]: Without dead ends: 9 [2019-11-28 00:01:20,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-28 00:01:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-28 00:01:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-28 00:01:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-28 00:01:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-28 00:01:20,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-11-28 00:01:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:01:20,171 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-28 00:01:20,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 00:01:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-28 00:01:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 00:01:20,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:01:20,172 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-11-28 00:01:20,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:01:20,378 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:01:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:01:20,379 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-11-28 00:01:20,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:01:20,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576744439] [2019-11-28 00:01:20,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:01:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:01:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 00:01:20,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576744439] [2019-11-28 00:01:20,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915156056] [2019-11-28 00:01:20,503 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-28 00:01:20,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-28 00:01:20,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:01:20,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 00:01:20,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:01:20,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 00:01:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 00:01:20,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 00:01:20,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2019-11-28 00:01:20,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289302712] [2019-11-28 00:01:20,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 00:01:20,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:01:20,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 00:01:20,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-28 00:01:20,609 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2019-11-28 00:01:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:01:20,653 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-11-28 00:01:20,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:01:20,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-28 00:01:20,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:01:20,653 INFO L225 Difference]: With dead ends: 9 [2019-11-28 00:01:20,654 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 00:01:20,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:01:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 00:01:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 00:01:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 00:01:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 00:01:20,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2019-11-28 00:01:20,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:01:20,656 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 00:01:20,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 00:01:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 00:01:20,656 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 00:01:20,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:01:20,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 00:01:20,894 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 00:01:20,895 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-28 00:01:20,895 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 00:01:20,895 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 00:01:20,895 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-28 00:01:20,895 INFO L242 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0)) (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 6)) [2019-11-28 00:01:20,896 INFO L246 CegarLoopResult]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2019-11-28 00:01:20,896 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-28 00:01:20,896 INFO L249 CegarLoopResult]: At program point L4-2(lines 1 20) the Hoare annotation is: true [2019-11-28 00:01:20,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:01:20 BoogieIcfgContainer [2019-11-28 00:01:20,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:01:20,914 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:01:20,914 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:01:20,914 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:01:20,915 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:01:19" (3/4) ... [2019-11-28 00:01:20,919 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 00:01:20,932 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-28 00:01:20,932 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 00:01:20,989 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:01:20,990 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:01:20,992 INFO L168 Benchmark]: Toolchain (without parser) took 2450.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 963.1 MB in the beginning and 999.5 MB in the end (delta: -36.5 MB). Peak memory consumption was 78.3 MB. Max. memory is 11.5 GB. [2019-11-28 00:01:20,993 INFO L168 Benchmark]: CDTParser took 0.26 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 00:01:20,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.24 ms. Allocated memory is still 1.0 GB. Free memory was 963.1 MB in the beginning and 951.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-28 00:01:20,995 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -160.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:01:20,995 INFO L168 Benchmark]: Boogie Preprocessor took 20.05 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:01:20,996 INFO L168 Benchmark]: RCFGBuilder took 258.20 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:01:20,997 INFO L168 Benchmark]: TraceAbstraction took 1759.28 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 999.5 MB in the end (delta: 92.9 MB). Peak memory consumption was 92.9 MB. Max. memory is 11.5 GB. [2019-11-28 00:01:20,997 INFO L168 Benchmark]: Witness Printer took 76.09 ms. Allocated memory is still 1.1 GB. Free memory is still 999.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:01:21,001 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 245.24 ms. Allocated memory is still 1.0 GB. Free memory was 963.1 MB in the beginning and 951.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 87.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -160.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.05 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 258.20 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1759.28 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 999.5 MB in the end (delta: 92.9 MB). Peak memory consumption was 92.9 MB. Max. memory is 11.5 GB. * Witness Printer took 76.09 ms. Allocated memory is still 1.1 GB. Free memory is still 999.5 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (x <= 0 && 0 <= x) || (x + 4294967295) % 4294967296 < 6 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 3 SDslu, 17 SDs, 0 SdLazy, 40 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 16 HoareAnnotationTreeSize, 2 FomulaSimplifications, 28 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 47 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 976 SizeOfPredicates, 3 NumberOfNonLiveVariables, 67 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 6/20 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...