./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum04-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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/loops/sum04-2.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4783c6ee2901b631023e80ae57ac531c222bf81 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:55:46,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:55:46,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:55:46,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:55:46,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:55:46,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:55:46,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:55:46,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:55:46,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:55:46,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:55:46,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:55:46,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:55:46,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:55:46,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:55:46,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:55:46,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:55:46,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:55:46,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:55:46,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:55:46,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:55:46,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:55:46,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:55:46,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:55:46,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:55:46,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:55:46,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:55:46,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:55:46,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:55:46,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:55:46,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:55:46,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:55:46,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:55:46,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:55:46,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:55:46,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:55:46,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:55:46,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:55:46,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:55:46,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:55:46,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:55:46,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:55:46,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:55:46,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:55:46,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:55:46,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:55:46,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:55:46,304 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:55:46,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:55:46,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:55:46,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:55:46,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:55:46,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:55:46,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:55:46,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:55:46,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:55:46,307 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:55:46,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:55:46,310 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:55:46,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:55:46,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:55:46,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:55:46,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:55:46,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:55:46,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:46,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:55:46,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:55:46,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:55:46,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:55:46,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:55:46,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:55:46,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:55:46,314 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(reach_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 -> e4783c6ee2901b631023e80ae57ac531c222bf81 [2020-10-20 00:55:46,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:55:46,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:55:46,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:55:46,554 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:55:46,557 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:55:46,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum04-2.i [2020-10-20 00:55:46,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a7fbecc3/58b0b97a115f43b88a1dc3d56c0c6b81/FLAGd803bd4b3 [2020-10-20 00:55:47,176 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:55:47,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum04-2.i [2020-10-20 00:55:47,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a7fbecc3/58b0b97a115f43b88a1dc3d56c0c6b81/FLAGd803bd4b3 [2020-10-20 00:55:47,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a7fbecc3/58b0b97a115f43b88a1dc3d56c0c6b81 [2020-10-20 00:55:47,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:55:47,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:55:47,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:47,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:55:47,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:55:47,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f69c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47, skipping insertion in model container [2020-10-20 00:55:47,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:55:47,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:55:47,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:47,841 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:55:47,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:47,873 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:55:47,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47 WrapperNode [2020-10-20 00:55:47,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:47,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:47,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:55:47,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:55:47,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:47,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:55:47,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:55:47,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:55:47,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (1/1) ... [2020-10-20 00:55:47,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:55:47,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:55:47,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:55:47,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:55:47,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (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 [2020-10-20 00:55:47,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:55:47,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:55:47,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:55:47,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:55:48,191 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:55:48,191 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:55:48,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:48 BoogieIcfgContainer [2020-10-20 00:55:48,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:55:48,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:55:48,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:55:48,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:55:48,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:55:47" (1/3) ... [2020-10-20 00:55:48,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a91d172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:48, skipping insertion in model container [2020-10-20 00:55:48,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:47" (2/3) ... [2020-10-20 00:55:48,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a91d172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:48, skipping insertion in model container [2020-10-20 00:55:48,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:48" (3/3) ... [2020-10-20 00:55:48,201 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-10-20 00:55:48,213 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:55:48,220 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:55:48,232 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:55:48,252 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:55:48,252 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:55:48,252 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:55:48,252 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:55:48,252 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:55:48,252 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:55:48,253 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:55:48,253 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:55:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-10-20 00:55:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:48,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:48,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:48,274 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:48,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:48,278 INFO L82 PathProgramCache]: Analyzing trace with hash 211949486, now seen corresponding path program 1 times [2020-10-20 00:55:48,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:48,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808367948] [2020-10-20 00:55:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:48,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808367948] [2020-10-20 00:55:48,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:48,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:55:48,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590240728] [2020-10-20 00:55:48,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:55:48,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:55:48,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:55:48,525 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-10-20 00:55:48,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:48,601 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-10-20 00:55:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:55:48,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-20 00:55:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:48,612 INFO L225 Difference]: With dead ends: 25 [2020-10-20 00:55:48,613 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:55:48,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:55:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:55:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-10-20 00:55:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 00:55:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-10-20 00:55:48,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-10-20 00:55:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:48,648 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-10-20 00:55:48,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:55:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-10-20 00:55:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:55:48,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:48,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:48,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:55:48,650 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:48,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1435847344, now seen corresponding path program 1 times [2020-10-20 00:55:48,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:48,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139864544] [2020-10-20 00:55:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:48,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139864544] [2020-10-20 00:55:48,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144159979] [2020-10-20 00:55:48,699 INFO L95 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 [2020-10-20 00:55:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:48,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:55:48,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:48,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:48,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 00:55:48,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321260541] [2020-10-20 00:55:48,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:55:48,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:48,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:55:48,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:48,820 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2020-10-20 00:55:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:48,844 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-20 00:55:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:55:48,845 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 00:55:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:48,845 INFO L225 Difference]: With dead ends: 20 [2020-10-20 00:55:48,845 INFO L226 Difference]: Without dead ends: 14 [2020-10-20 00:55:48,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:48,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-20 00:55:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-20 00:55:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 00:55:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-20 00:55:48,849 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-10-20 00:55:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:48,850 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-20 00:55:48,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:55:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-20 00:55:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:55:48,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:48,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:49,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-20 00:55:49,062 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash 780649778, now seen corresponding path program 2 times [2020-10-20 00:55:49,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:49,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179487231] [2020-10-20 00:55:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179487231] [2020-10-20 00:55:49,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020543150] [2020-10-20 00:55:49,166 INFO L93 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 [2020-10-20 00:55:49,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:55:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:49,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:55:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:49,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:49,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 00:55:49,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890233767] [2020-10-20 00:55:49,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:55:49,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:49,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:55:49,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:55:49,248 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-10-20 00:55:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:49,268 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-20 00:55:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:55:49,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-20 00:55:49,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:49,270 INFO L225 Difference]: With dead ends: 22 [2020-10-20 00:55:49,270 INFO L226 Difference]: Without dead ends: 16 [2020-10-20 00:55:49,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:55:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-20 00:55:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-20 00:55:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-20 00:55:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-20 00:55:49,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-20 00:55:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:49,276 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-20 00:55:49,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:55:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-20 00:55:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:55:49,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:49,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:49,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:49,489 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:49,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1798985932, now seen corresponding path program 3 times [2020-10-20 00:55:49,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:49,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043150824] [2020-10-20 00:55:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:49,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043150824] [2020-10-20 00:55:49,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024718988] [2020-10-20 00:55:49,546 INFO L93 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 [2020-10-20 00:55:49,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 00:55:49,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:55:49,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:49,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:49,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 00:55:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705777975] [2020-10-20 00:55:49,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:55:49,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:55:49,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:55:49,641 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-20 00:55:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:49,668 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-20 00:55:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:55:49,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-20 00:55:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:49,669 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:55:49,669 INFO L226 Difference]: Without dead ends: 18 [2020-10-20 00:55:49,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:55:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-20 00:55:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-20 00:55:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-20 00:55:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-20 00:55:49,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-20 00:55:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:49,674 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-20 00:55:49,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:55:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-20 00:55:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:55:49,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:49,676 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:49,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:49,889 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:49,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1662193846, now seen corresponding path program 4 times [2020-10-20 00:55:49,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:49,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451557668] [2020-10-20 00:55:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451557668] [2020-10-20 00:55:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107355386] [2020-10-20 00:55:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:50,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:55:50,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:55:50,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:50,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:50,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 00:55:50,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871009673] [2020-10-20 00:55:50,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:55:50,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:50,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:55:50,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:55:50,066 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-20 00:55:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:50,093 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-20 00:55:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:55:50,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-20 00:55:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:50,094 INFO L225 Difference]: With dead ends: 26 [2020-10-20 00:55:50,095 INFO L226 Difference]: Without dead ends: 20 [2020-10-20 00:55:50,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:55:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-20 00:55:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-20 00:55:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-20 00:55:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-20 00:55:50,100 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-20 00:55:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:50,100 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-20 00:55:50,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:55:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-20 00:55:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:55:50,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:50,102 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:50,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:50,313 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:50,314 INFO L82 PathProgramCache]: Analyzing trace with hash -743693896, now seen corresponding path program 5 times [2020-10-20 00:55:50,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:50,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817445774] [2020-10-20 00:55:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:50,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817445774] [2020-10-20 00:55:50,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662502147] [2020-10-20 00:55:50,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:50,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-20 00:55:50,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:50,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:55:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:50,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:50,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 00:55:50,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041461399] [2020-10-20 00:55:50,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:55:50,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:50,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:55:50,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:55:50,489 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 9 states. [2020-10-20 00:55:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:50,531 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-20 00:55:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:55:50,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-20 00:55:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:50,532 INFO L225 Difference]: With dead ends: 28 [2020-10-20 00:55:50,532 INFO L226 Difference]: Without dead ends: 22 [2020-10-20 00:55:50,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:55:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-20 00:55:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-20 00:55:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 00:55:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-20 00:55:50,536 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-20 00:55:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:50,537 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-20 00:55:50,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:55:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-20 00:55:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 00:55:50,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:50,538 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:50,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 00:55:50,739 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:50,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2109408710, now seen corresponding path program 6 times [2020-10-20 00:55:50,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:50,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956151892] [2020-10-20 00:55:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:50,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956151892] [2020-10-20 00:55:50,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525651338] [2020-10-20 00:55:50,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:50,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-20 00:55:50,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:50,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:55:50,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:50,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:50,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 00:55:50,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933620690] [2020-10-20 00:55:50,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:55:50,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:50,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:55:50,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:55:50,903 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2020-10-20 00:55:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:50,939 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-20 00:55:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:55:50,940 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-20 00:55:50,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:50,941 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:55:50,941 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 00:55:50,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:55:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 00:55:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-20 00:55:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 00:55:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-20 00:55:50,947 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-20 00:55:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:50,948 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-20 00:55:50,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:55:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-20 00:55:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 00:55:50,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:50,950 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:51,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:51,163 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:51,163 INFO L82 PathProgramCache]: Analyzing trace with hash -301352388, now seen corresponding path program 7 times [2020-10-20 00:55:51,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:51,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044258564] [2020-10-20 00:55:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:51,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044258564] [2020-10-20 00:55:51,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883247829] [2020-10-20 00:55:51,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:55:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:51,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:51,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 00:55:51,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956373511] [2020-10-20 00:55:51,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 00:55:51,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:51,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 00:55:51,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:55:51,349 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 11 states. [2020-10-20 00:55:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:51,389 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-20 00:55:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 00:55:51,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-20 00:55:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:51,390 INFO L225 Difference]: With dead ends: 31 [2020-10-20 00:55:51,391 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 00:55:51,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:55:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 00:55:51,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-20 00:55:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 00:55:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-20 00:55:51,396 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-20 00:55:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:51,396 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-20 00:55:51,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 00:55:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-20 00:55:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 00:55:51,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:51,398 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:51,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:51,610 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:51,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2073985470, now seen corresponding path program 8 times [2020-10-20 00:55:51,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:51,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003582776] [2020-10-20 00:55:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:51,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003582776] [2020-10-20 00:55:51,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921756909] [2020-10-20 00:55:51,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:51,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:55:51,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:51,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 00:55:51,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:51,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:51,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:51,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 00:55:51,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105331206] [2020-10-20 00:55:51,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 00:55:51,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:51,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 00:55:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:55:51,895 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-10-20 00:55:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:51,992 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-20 00:55:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:55:51,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-20 00:55:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:51,994 INFO L225 Difference]: With dead ends: 33 [2020-10-20 00:55:51,994 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 00:55:51,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-20 00:55:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 00:55:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-20 00:55:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:55:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-20 00:55:52,000 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-20 00:55:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:52,000 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-20 00:55:52,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 00:55:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-20 00:55:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 00:55:52,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:52,002 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:52,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-20 00:55:52,213 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:52,214 INFO L82 PathProgramCache]: Analyzing trace with hash -148934464, now seen corresponding path program 9 times [2020-10-20 00:55:52,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:52,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025411922] [2020-10-20 00:55:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:52,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025411922] [2020-10-20 00:55:52,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165240233] [2020-10-20 00:55:52,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:52,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-20 00:55:52,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:52,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 00:55:52,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:52,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 00:55:52,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 12 [2020-10-20 00:55:52,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17373573] [2020-10-20 00:55:52,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 00:55:52,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:52,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 00:55:52,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:55:52,417 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-20 00:55:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:52,449 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-20 00:55:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:55:52,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-20 00:55:52,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:52,450 INFO L225 Difference]: With dead ends: 27 [2020-10-20 00:55:52,450 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:55:52,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:55:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:55:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:55:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:55:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:55:52,451 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-10-20 00:55:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:52,452 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:55:52,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 00:55:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:55:52,452 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:55:52,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:52,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:55:52,831 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-20 00:55:52,837 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:55:52,838 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-10-20 00:55:52,838 INFO L277 CegarLoopResult]: At program point L15-2(lines 1 28) the Hoare annotation is: true [2020-10-20 00:55:52,838 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:55:52,838 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:55:52,839 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:55:52,839 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-20 00:55:52,839 INFO L274 CegarLoopResult]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-10-20 00:55:52,839 INFO L270 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= 2 ULTIMATE.start_main_~i~0) (<= 2 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 2) (<= ULTIMATE.start_main_~sn~0 2)) (and (<= 8 ULTIMATE.start_main_~i~0) (<= 14 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~sn~0 14) (<= ULTIMATE.start_main_~i~0 8)) (and (<= ULTIMATE.start_main_~i~0 3) (<= ULTIMATE.start_main_~sn~0 4) (<= 4 ULTIMATE.start_main_~sn~0) (<= 3 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~sn~0 12) (<= 12 ULTIMATE.start_main_~sn~0) (<= 7 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 7)) (and (= ULTIMATE.start_main_~i~0 1) (= ULTIMATE.start_main_~sn~0 0)) (and (<= ULTIMATE.start_main_~sn~0 16) (<= 9 ULTIMATE.start_main_~i~0) (< 15 ULTIMATE.start_main_~sn~0)) (and (<= ULTIMATE.start_main_~sn~0 6) (<= 6 ULTIMATE.start_main_~sn~0) (<= 4 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 4)) (and (<= ULTIMATE.start_main_~i~0 5) (<= ULTIMATE.start_main_~sn~0 8) (<= 5 ULTIMATE.start_main_~i~0) (<= 8 ULTIMATE.start_main_~sn~0)) (and (<= 10 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 6) (<= ULTIMATE.start_main_~sn~0 10) (<= 6 ULTIMATE.start_main_~i~0))) [2020-10-20 00:55:52,839 INFO L274 CegarLoopResult]: For program point L24-4(lines 24 26) no Hoare annotation was computed. [2020-10-20 00:55:52,840 INFO L274 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-10-20 00:55:52,840 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-20 00:55:52,840 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-20 00:55:52,840 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-10-20 00:55:52,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:55:52 BoogieIcfgContainer [2020-10-20 00:55:52,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:55:52,880 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:55:52,880 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:55:52,880 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:55:52,881 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:48" (3/4) ... [2020-10-20 00:55:52,884 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:55:52,893 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-20 00:55:52,894 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 00:55:52,894 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:55:52,894 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:55:52,944 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:55:52,944 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:55:52,946 INFO L168 Benchmark]: Toolchain (without parser) took 5361.28 ms. Allocated memory was 41.4 MB in the beginning and 51.9 MB in the end (delta: 10.5 MB). Free memory was 19.3 MB in the beginning and 12.9 MB in the end (delta: 6.5 MB). Peak memory consumption was 16.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:52,947 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:52,948 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.62 ms. Allocated memory was 41.4 MB in the beginning and 42.5 MB in the end (delta: 1.0 MB). Free memory was 18.5 MB in the beginning and 18.8 MB in the end (delta: -288.8 kB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:52,948 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.77 ms. Allocated memory is still 42.5 MB. Free memory was 18.8 MB in the beginning and 17.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:52,949 INFO L168 Benchmark]: Boogie Preprocessor took 20.59 ms. Allocated memory is still 42.5 MB. Free memory was 17.2 MB in the beginning and 16.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:52,950 INFO L168 Benchmark]: RCFGBuilder took 265.40 ms. Allocated memory was 42.5 MB in the beginning and 43.5 MB in the end (delta: 1.0 MB). Free memory was 15.8 MB in the beginning and 20.0 MB in the end (delta: -4.2 MB). Peak memory consumption was 5.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:52,951 INFO L168 Benchmark]: TraceAbstraction took 4685.43 ms. Allocated memory was 43.5 MB in the beginning and 51.9 MB in the end (delta: 8.4 MB). Free memory was 19.5 MB in the beginning and 15.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:52,951 INFO L168 Benchmark]: Witness Printer took 64.23 ms. Allocated memory is still 51.9 MB. Free memory was 15.8 MB in the beginning and 12.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:52,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 280.62 ms. Allocated memory was 41.4 MB in the beginning and 42.5 MB in the end (delta: 1.0 MB). Free memory was 18.5 MB in the beginning and 18.8 MB in the end (delta: -288.8 kB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 32.77 ms. Allocated memory is still 42.5 MB. Free memory was 18.8 MB in the beginning and 17.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 20.59 ms. Allocated memory is still 42.5 MB. Free memory was 17.2 MB in the beginning and 16.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 265.40 ms. Allocated memory was 42.5 MB in the beginning and 43.5 MB in the end (delta: 1.0 MB). Free memory was 15.8 MB in the beginning and 20.0 MB in the end (delta: -4.2 MB). Peak memory consumption was 5.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4685.43 ms. Allocated memory was 43.5 MB in the beginning and 51.9 MB in the end (delta: 8.4 MB). Free memory was 19.5 MB in the beginning and 15.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 14.3 GB. * Witness Printer took 64.23 ms. Allocated memory is still 51.9 MB. Free memory was 15.8 MB in the beginning and 12.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 24]: Loop Invariant Derived loop invariant: ((((((((((2 <= i && 2 <= sn) && i <= 2) && sn <= 2) || (((8 <= i && 14 <= sn) && sn <= 14) && i <= 8)) || (((i <= 3 && sn <= 4) && 4 <= sn) && 3 <= i)) || (((sn <= 12 && 12 <= sn) && 7 <= i) && i <= 7)) || (i == 1 && sn == 0)) || ((sn <= 16 && 9 <= i) && 15 < sn)) || (((sn <= 6 && 6 <= sn) && 4 <= i) && i <= 4)) || (((i <= 5 && sn <= 8) && 5 <= i) && 8 <= sn)) || (((10 <= sn && i <= 6) && sn <= 10) && 6 <= i) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 10, TraceHistogramMax: 9, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 37 SDslu, 324 SDs, 0 SdLazy, 272 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=9, 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, 10 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 12 NumberOfFragments, 110 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 332 NumberOfCodeBlocks, 330 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 313 ConstructedInterpolants, 0 QuantifiedInterpolants, 16572 SizeOfPredicates, 10 NumberOfNonLiveVariables, 549 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 19 InterpolantComputations, 2 PerfectInterpolantSequences, 147/570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...