./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 f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1dbb3ffac91b20f4dd3e7b4eb671e84b2870fc33 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:04:00,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:04:00,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:04:00,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:04:00,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:04:00,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:04:00,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:04:00,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:04:00,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:04:00,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:04:00,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:04:00,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:04:00,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:04:00,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:04:00,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:04:00,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:04:00,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:04:00,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:04:00,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:04:00,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:04:00,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:04:00,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:04:00,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:04:00,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:04:00,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:04:00,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:04:00,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:04:00,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:04:00,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:04:00,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:04:00,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:04:00,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:04:00,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:04:00,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:04:00,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:04:00,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:04:00,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:04:00,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:04:00,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:04:00,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:04:00,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:04:00,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:04:00,395 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:04:00,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:04:00,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:04:00,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:04:00,397 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:04:00,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:04:00,398 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:04:00,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:04:00,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:04:00,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:04:00,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:04:00,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:04:00,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:04:00,399 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:04:00,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:04:00,399 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:04:00,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:04:00,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:04:00,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:04:00,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:04:00,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:04:00,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:04:00,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:04:00,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:04:00,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:04:00,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:04:00,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:04:00,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:04:00,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:04:00,403 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 -> 1dbb3ffac91b20f4dd3e7b4eb671e84b2870fc33 [2019-11-28 17:04:00,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:04:00,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:04:00,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:04:00,720 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:04:00,721 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:04:00,721 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum04-2.i [2019-11-28 17:04:00,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f27a89e8b/849cca7948374efdab397c72cab18c1f/FLAGd14b4c644 [2019-11-28 17:04:01,175 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:04:01,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum04-2.i [2019-11-28 17:04:01,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f27a89e8b/849cca7948374efdab397c72cab18c1f/FLAGd14b4c644 [2019-11-28 17:04:01,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f27a89e8b/849cca7948374efdab397c72cab18c1f [2019-11-28 17:04:01,609 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:04:01,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:04:01,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:04:01,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:04:01,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:04:01,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69923c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01, skipping insertion in model container [2019-11-28 17:04:01,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:04:01,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:04:01,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:04:01,807 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:04:01,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:04:01,831 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:04:01,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01 WrapperNode [2019-11-28 17:04:01,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:04:01,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:04:01,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:04:01,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:04:01,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:04:01,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:04:01,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:04:01,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:04:01,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... [2019-11-28 17:04:01,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:04:01,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:04:01,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:04:01,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:04:01,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:04:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:04:02,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:04:02,216 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:04:02,216 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 17:04:02,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:04:02 BoogieIcfgContainer [2019-11-28 17:04:02,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:04:02,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:04:02,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:04:02,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:04:02,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:04:01" (1/3) ... [2019-11-28 17:04:02,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b7faa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:04:02, skipping insertion in model container [2019-11-28 17:04:02,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:04:01" (2/3) ... [2019-11-28 17:04:02,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b7faa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:04:02, skipping insertion in model container [2019-11-28 17:04:02,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:04:02" (3/3) ... [2019-11-28 17:04:02,227 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2019-11-28 17:04:02,238 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:04:02,245 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:04:02,258 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:04:02,283 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:04:02,284 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:04:02,284 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:04:02,284 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:04:02,284 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:04:02,284 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:04:02,285 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:04:02,285 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:04:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-28 17:04:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:04:02,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:02,307 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:04:02,307 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:02,314 INFO L82 PathProgramCache]: Analyzing trace with hash 29776202, now seen corresponding path program 1 times [2019-11-28 17:04:02,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:02,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497772009] [2019-11-28 17:04:02,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:02,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497772009] [2019-11-28 17:04:02,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:04:02,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 17:04:02,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398323170] [2019-11-28 17:04:02,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 17:04:02,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:02,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 17:04:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:04:02,509 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-28 17:04:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:02,561 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2019-11-28 17:04:02,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 17:04:02,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-28 17:04:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:02,572 INFO L225 Difference]: With dead ends: 19 [2019-11-28 17:04:02,572 INFO L226 Difference]: Without dead ends: 9 [2019-11-28 17:04:02,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:04:02,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-28 17:04:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2019-11-28 17:04:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 17:04:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-28 17:04:02,605 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2019-11-28 17:04:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:02,606 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-28 17:04:02,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 17:04:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-28 17:04:02,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 17:04:02,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:02,608 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:04:02,608 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:02,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1396608660, now seen corresponding path program 1 times [2019-11-28 17:04:02,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:02,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794892173] [2019-11-28 17:04:02,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:02,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794892173] [2019-11-28 17:04:02,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852729739] [2019-11-28 17:04:02,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:02,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 17:04:02,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:02,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:02,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-28 17:04:02,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625493748] [2019-11-28 17:04:02,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:04:02,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:02,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:04:02,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:04:02,771 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 4 states. [2019-11-28 17:04:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:02,797 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-28 17:04:02,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:04:02,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-28 17:04:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:02,798 INFO L225 Difference]: With dead ends: 15 [2019-11-28 17:04:02,798 INFO L226 Difference]: Without dead ends: 11 [2019-11-28 17:04:02,799 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:04:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-28 17:04:02,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-28 17:04:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-28 17:04:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-28 17:04:02,803 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2019-11-28 17:04:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:02,803 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-28 17:04:02,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:04:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-28 17:04:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:04:02,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:02,804 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2019-11-28 17:04:03,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:03,008 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:03,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2057893618, now seen corresponding path program 2 times [2019-11-28 17:04:03,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:03,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530260524] [2019-11-28 17:04:03,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:03,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530260524] [2019-11-28 17:04:03,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282698268] [2019-11-28 17:04:03,072 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 17:04:03,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:04:03,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:04:03,109 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 17:04:03,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:03,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:03,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-11-28 17:04:03,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682504696] [2019-11-28 17:04:03,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:04:03,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:03,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:04:03,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:04:03,118 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2019-11-28 17:04:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:03,153 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-11-28 17:04:03,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:04:03,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:04:03,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:03,155 INFO L225 Difference]: With dead ends: 17 [2019-11-28 17:04:03,155 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 17:04:03,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:04:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 17:04:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-28 17:04:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-28 17:04:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-28 17:04:03,159 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2019-11-28 17:04:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:03,160 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-28 17:04:03,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:04:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-28 17:04:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 17:04:03,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:03,161 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2019-11-28 17:04:03,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:03,365 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:03,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1897578448, now seen corresponding path program 3 times [2019-11-28 17:04:03,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:03,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825893119] [2019-11-28 17:04:03,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:03,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825893119] [2019-11-28 17:04:03,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483867331] [2019-11-28 17:04:03,448 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 17:04:03,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 17:04:03,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:04:03,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 17:04:03,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:03,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:03,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-11-28 17:04:03,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988050012] [2019-11-28 17:04:03,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:04:03,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:03,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:04:03,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:04:03,509 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-11-28 17:04:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:03,554 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-28 17:04:03,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:04:03,555 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-28 17:04:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:03,556 INFO L225 Difference]: With dead ends: 19 [2019-11-28 17:04:03,556 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 17:04:03,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:04:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 17:04:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-28 17:04:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 17:04:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-28 17:04:03,563 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-11-28 17:04:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:03,564 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-28 17:04:03,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:04:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-28 17:04:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 17:04:03,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:03,565 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2019-11-28 17:04:03,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:03,771 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1841444562, now seen corresponding path program 4 times [2019-11-28 17:04:03,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:03,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410660373] [2019-11-28 17:04:03,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:03,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410660373] [2019-11-28 17:04:03,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979822843] [2019-11-28 17:04:03,872 INFO L92 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 [2019-11-28 17:04:03,895 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:04:03,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:04:03,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:04:03,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:03,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:03,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-28 17:04:03,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742464794] [2019-11-28 17:04:03,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:04:03,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:03,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:04:03,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:04:03,908 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2019-11-28 17:04:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:03,936 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-28 17:04:03,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:04:03,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-28 17:04:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:03,937 INFO L225 Difference]: With dead ends: 21 [2019-11-28 17:04:03,937 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:04:03,938 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:04:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:04:03,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-28 17:04:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 17:04:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-28 17:04:03,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-11-28 17:04:03,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:03,943 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-28 17:04:03,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:04:03,943 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-28 17:04:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:04:03,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:03,944 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2019-11-28 17:04:04,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:04,145 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash 154930420, now seen corresponding path program 5 times [2019-11-28 17:04:04,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:04,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223892924] [2019-11-28 17:04:04,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:04,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223892924] [2019-11-28 17:04:04,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296679684] [2019-11-28 17:04:04,239 INFO L92 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) [2019-11-28 17:04:04,268 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 17:04:04,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:04,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 17:04:04,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:04,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:04,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-28 17:04:04,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034618046] [2019-11-28 17:04:04,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:04:04,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:04,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:04:04,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:04:04,282 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-11-28 17:04:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:04,331 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-28 17:04:04,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:04:04,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-28 17:04:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:04,333 INFO L225 Difference]: With dead ends: 23 [2019-11-28 17:04:04,333 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 17:04:04,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:04:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 17:04:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-28 17:04:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 17:04:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-28 17:04:04,338 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2019-11-28 17:04:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:04,338 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-28 17:04:04,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:04:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-28 17:04:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 17:04:04,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:04,339 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2019-11-28 17:04:04,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:04,543 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:04,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1382489450, now seen corresponding path program 6 times [2019-11-28 17:04:04,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:04,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46609110] [2019-11-28 17:04:04,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:04,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46609110] [2019-11-28 17:04:04,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783996644] [2019-11-28 17:04:04,617 INFO L92 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 [2019-11-28 17:04:04,659 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 17:04:04,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:04:04,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:04:04,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:04,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:04,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-28 17:04:04,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471584762] [2019-11-28 17:04:04,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:04:04,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:04:04,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:04:04,673 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2019-11-28 17:04:04,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:04,703 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-28 17:04:04,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:04:04,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-28 17:04:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:04,705 INFO L225 Difference]: With dead ends: 25 [2019-11-28 17:04:04,705 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 17:04:04,706 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:04:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 17:04:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-28 17:04:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:04:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-28 17:04:04,712 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2019-11-28 17:04:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:04,712 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-28 17:04:04,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:04:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-28 17:04:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 17:04:04,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:04,713 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2019-11-28 17:04:04,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:04,916 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1374234696, now seen corresponding path program 7 times [2019-11-28 17:04:04,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:04,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497623928] [2019-11-28 17:04:04,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:05,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497623928] [2019-11-28 17:04:05,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353455376] [2019-11-28 17:04:05,014 INFO L92 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 [2019-11-28 17:04:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:05,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 17:04:05,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:05,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:05,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-28 17:04:05,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189358613] [2019-11-28 17:04:05,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:04:05,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:05,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:04:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:04:05,067 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 10 states. [2019-11-28 17:04:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:05,113 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-28 17:04:05,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:04:05,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-28 17:04:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:05,115 INFO L225 Difference]: With dead ends: 26 [2019-11-28 17:04:05,115 INFO L226 Difference]: Without dead ends: 22 [2019-11-28 17:04:05,115 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:04:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-28 17:04:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-28 17:04:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 17:04:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-28 17:04:05,120 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2019-11-28 17:04:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:05,121 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-28 17:04:05,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:04:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-28 17:04:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:04:05,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:05,122 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2019-11-28 17:04:05,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:05,330 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:05,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2031350694, now seen corresponding path program 8 times [2019-11-28 17:04:05,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:05,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94958792] [2019-11-28 17:04:05,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:05,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94958792] [2019-11-28 17:04:05,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567787204] [2019-11-28 17:04:05,542 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 17:04:05,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:04:05,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:05,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 17:04:05,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:04:05,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:04:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:05,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:04:05,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-28 17:04:05,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516284232] [2019-11-28 17:04:05,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:04:05,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:05,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:04:05,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:04:05,624 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2019-11-28 17:04:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:05,751 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-28 17:04:05,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 17:04:05,751 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-28 17:04:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:05,752 INFO L225 Difference]: With dead ends: 28 [2019-11-28 17:04:05,752 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 17:04:05,753 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:04:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 17:04:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-28 17:04:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 17:04:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-28 17:04:05,758 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2019-11-28 17:04:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:05,758 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-28 17:04:05,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:04:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-28 17:04:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 17:04:05,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:04:05,759 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2019-11-28 17:04:05,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:04:05,963 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:04:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:04:05,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2135335036, now seen corresponding path program 9 times [2019-11-28 17:04:05,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:04:05,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531284936] [2019-11-28 17:04:05,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:04:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:04:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:04:06,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531284936] [2019-11-28 17:04:06,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:04:06,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-28 17:04:06,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379863230] [2019-11-28 17:04:06,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:04:06,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:04:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:04:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:04:06,074 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2019-11-28 17:04:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:04:06,122 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-28 17:04:06,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:04:06,123 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-11-28 17:04:06,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:04:06,123 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:04:06,124 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:04:06,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:04:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:04:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:04:06,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:04:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:04:06,125 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2019-11-28 17:04:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:04:06,125 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:04:06,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:04:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:04:06,126 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:04:06,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:04:06,241 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:04:06,241 INFO L246 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2019-11-28 17:04:06,242 INFO L242 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (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 (<= 9 ULTIMATE.start_main_~i~0) (<= 16 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~sn~0 16)) (and (<= 8 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 5) (<= 5 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~sn~0 8)) (and (<= ULTIMATE.start_main_~sn~0 10) (<= ULTIMATE.start_main_~i~0 6) (<= 6 ULTIMATE.start_main_~i~0) (<= 10 ULTIMATE.start_main_~sn~0)) (and (<= ULTIMATE.start_main_~sn~0 12) (<= 7 ULTIMATE.start_main_~i~0) (<= 12 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 7)) (and (<= 2 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 2) (<= ULTIMATE.start_main_~sn~0 2) (<= 2 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~sn~0 0) (<= 1 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 1) (<= 0 ULTIMATE.start_main_~sn~0)) (and (<= 3 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 3) (<= ULTIMATE.start_main_~sn~0 4) (<= 4 ULTIMATE.start_main_~sn~0)) (and (<= 14 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 8) (<= ULTIMATE.start_main_~sn~0 14) (<= 8 ULTIMATE.start_main_~i~0))) [2019-11-28 17:04:06,242 INFO L246 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2019-11-28 17:04:06,242 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-28 17:04:06,242 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:04:06,242 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:04:06,242 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-28 17:04:06,243 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-28 17:04:06,243 INFO L249 CegarLoopResult]: At program point L4-2(lines 1 17) the Hoare annotation is: true [2019-11-28 17:04:06,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:04:06 BoogieIcfgContainer [2019-11-28 17:04:06,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:04:06,264 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:04:06,264 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:04:06,265 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:04:06,265 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:04:02" (3/4) ... [2019-11-28 17:04:06,269 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:04:06,279 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-28 17:04:06,279 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:04:06,320 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:04:06,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:04:06,322 INFO L168 Benchmark]: Toolchain (without parser) took 4711.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 957.7 MB in the beginning and 869.7 MB in the end (delta: 87.9 MB). Peak memory consumption was 222.2 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:06,323 INFO L168 Benchmark]: CDTParser took 2.54 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:04:06,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.25 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:06,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:06,325 INFO L168 Benchmark]: Boogie Preprocessor took 21.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:04:06,325 INFO L168 Benchmark]: RCFGBuilder took 271.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:06,326 INFO L168 Benchmark]: TraceAbstraction took 4045.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 869.7 MB in the end (delta: 243.6 MB). Peak memory consumption was 243.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:04:06,326 INFO L168 Benchmark]: Witness Printer took 55.82 ms. Allocated memory is still 1.2 GB. Free memory is still 869.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:04:06,329 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.54 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 220.25 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 91.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 271.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4045.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 869.7 MB in the end (delta: 243.6 MB). Peak memory consumption was 243.6 MB. Max. memory is 11.5 GB. * Witness Printer took 55.82 ms. Allocated memory is still 1.2 GB. Free memory is still 869.7 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: 13]: Loop Invariant Derived loop invariant: ((((((((((sn <= 6 && 6 <= sn) && 4 <= i) && i <= 4) || ((9 <= i && 16 <= sn) && sn <= 16)) || (((8 <= sn && i <= 5) && 5 <= i) && sn <= 8)) || (((sn <= 10 && i <= 6) && 6 <= i) && 10 <= sn)) || (((sn <= 12 && 7 <= i) && 12 <= sn) && i <= 7)) || (((2 <= sn && i <= 2) && sn <= 2) && 2 <= i)) || (((sn <= 0 && 1 <= i) && i <= 1) && 0 <= sn)) || (((3 <= i && i <= 3) && sn <= 4) && 4 <= sn)) || (((14 <= sn && i <= 8) && sn <= 14) && 8 <= i) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Result: SAFE, OverallTime: 3.8s, OverallIterations: 10, TraceHistogramMax: 9, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 56 SDtfs, 37 SDslu, 218 SDs, 0 SdLazy, 287 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 116 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 252 NumberOfCodeBlocks, 251 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 12188 SizeOfPredicates, 9 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 81/489 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...