./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/bhmr2007.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/bhmr2007.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer --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 ad9e151ff8328164b10bed0ca90425954d296eb8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 18:17:46,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:17:46,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:17:46,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:17:46,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:17:46,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:17:46,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:17:46,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:17:46,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:17:46,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:17:46,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:17:46,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:17:46,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:17:46,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:17:46,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:17:46,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:17:46,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:17:46,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:17:46,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:17:46,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:17:46,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:17:46,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:17:46,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:17:46,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:17:46,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:17:46,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:17:46,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:17:46,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:17:46,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:17:46,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:17:46,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:17:46,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:17:46,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:17:46,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:17:46,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:17:46,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:17:46,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:17:46,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:17:46,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:17:46,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:17:46,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:17:46,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:17:46,346 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:17:46,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:17:46,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:17:46,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:17:46,350 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:17:46,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:17:46,350 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:17:46,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:17:46,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:17:46,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:17:46,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:17:46,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:17:46,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:17:46,353 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:17:46,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:17:46,354 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:17:46,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:17:46,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:17:46,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:17:46,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:17:46,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:17:46,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:17:46,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:17:46,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:17:46,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:17:46,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:17:46,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:17:46,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:17:46,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:17:46,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad9e151ff8328164b10bed0ca90425954d296eb8 [2020-11-29 18:17:46,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:17:46,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:17:46,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:17:46,685 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:17:46,690 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:17:46,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/../../sv-benchmarks/c/loop-lit/bhmr2007.i [2020-11-29 18:17:46,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/data/259746374/fbab2fd13cb244e6a749c1232693299f/FLAG9e33c1465 [2020-11-29 18:17:47,329 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:17:47,330 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/sv-benchmarks/c/loop-lit/bhmr2007.i [2020-11-29 18:17:47,337 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/data/259746374/fbab2fd13cb244e6a749c1232693299f/FLAG9e33c1465 [2020-11-29 18:17:47,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/data/259746374/fbab2fd13cb244e6a749c1232693299f [2020-11-29 18:17:47,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:17:47,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:17:47,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:17:47,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:17:47,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:17:47,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:17:47" (1/1) ... [2020-11-29 18:17:47,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afdc7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:47, skipping insertion in model container [2020-11-29 18:17:47,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:17:47" (1/1) ... [2020-11-29 18:17:47,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:17:47,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:17:48,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:17:48,066 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:17:48,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:17:48,116 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:17:48,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48 WrapperNode [2020-11-29 18:17:48,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:17:48,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:17:48,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:17:48,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:17:48,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... [2020-11-29 18:17:48,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... [2020-11-29 18:17:48,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:17:48,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:17:48,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:17:48,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:17:48,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... [2020-11-29 18:17:48,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... [2020-11-29 18:17:48,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... [2020-11-29 18:17:48,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... [2020-11-29 18:17:48,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... [2020-11-29 18:17:48,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... [2020-11-29 18:17:48,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... [2020-11-29 18:17:48,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:17:48,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:17:48,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:17:48,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:17:48,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/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 [2020-11-29 18:17:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:17:48,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:17:48,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:17:48,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:17:48,638 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:17:48,653 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 18:17:48,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:17:48 BoogieIcfgContainer [2020-11-29 18:17:48,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:17:48,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:17:48,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:17:48,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:17:48,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:17:47" (1/3) ... [2020-11-29 18:17:48,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18aec981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:17:48, skipping insertion in model container [2020-11-29 18:17:48,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:17:48" (2/3) ... [2020-11-29 18:17:48,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18aec981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:17:48, skipping insertion in model container [2020-11-29 18:17:48,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:17:48" (3/3) ... [2020-11-29 18:17:48,676 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-11-29 18:17:48,689 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:17:48,701 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:17:48,733 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:17:48,774 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:17:48,774 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:17:48,775 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:17:48,775 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:17:48,775 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:17:48,775 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:17:48,775 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:17:48,775 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:17:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 18:17:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 18:17:48,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:17:48,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:17:48,797 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:17:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:17:48,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1653287849, now seen corresponding path program 1 times [2020-11-29 18:17:48,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:17:48,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093787883] [2020-11-29 18:17:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:17:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:17:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:17:48,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093787883] [2020-11-29 18:17:48,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:17:48,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 18:17:48,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087399497] [2020-11-29 18:17:48,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 18:17:48,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:17:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 18:17:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 18:17:48,990 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-11-29 18:17:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:17:49,007 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-11-29 18:17:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 18:17:49,009 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-29 18:17:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:17:49,018 INFO L225 Difference]: With dead ends: 27 [2020-11-29 18:17:49,019 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 18:17:49,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 18:17:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 18:17:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 18:17:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 18:17:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-29 18:17:49,058 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2020-11-29 18:17:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:17:49,059 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 18:17:49,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 18:17:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-29 18:17:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 18:17:49,060 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:17:49,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:17:49,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:17:49,061 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:17:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:17:49,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1338367188, now seen corresponding path program 1 times [2020-11-29 18:17:49,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:17:49,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49285384] [2020-11-29 18:17:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:17:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:17:49,401 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2020-11-29 18:17:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:17:49,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49285384] [2020-11-29 18:17:49,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:17:49,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 18:17:49,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829410977] [2020-11-29 18:17:49,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 18:17:49,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:17:49,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 18:17:49,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:17:49,421 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-11-29 18:17:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:17:49,536 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-11-29 18:17:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:17:49,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-29 18:17:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:17:49,539 INFO L225 Difference]: With dead ends: 20 [2020-11-29 18:17:49,539 INFO L226 Difference]: Without dead ends: 14 [2020-11-29 18:17:49,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:17:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-29 18:17:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-29 18:17:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 18:17:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-29 18:17:49,550 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2020-11-29 18:17:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:17:49,551 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 18:17:49,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 18:17:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-29 18:17:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 18:17:49,553 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:17:49,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:17:49,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:17:49,554 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:17:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:17:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1704358272, now seen corresponding path program 1 times [2020-11-29 18:17:49,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:17:49,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719551770] [2020-11-29 18:17:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:17:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:17:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:17:49,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719551770] [2020-11-29 18:17:49,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028795382] [2020-11-29 18:17:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/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 [2020-11-29 18:17:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:17:49,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:17:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:17:50,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:17:50,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:17:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:17:50,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:17:50,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-11-29 18:17:50,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415407630] [2020-11-29 18:17:50,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 18:17:50,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:17:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:17:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:17:50,231 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 12 states. [2020-11-29 18:17:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:17:50,560 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-29 18:17:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 18:17:50,563 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-11-29 18:17:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:17:50,564 INFO L225 Difference]: With dead ends: 28 [2020-11-29 18:17:50,564 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 18:17:50,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-29 18:17:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 18:17:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2020-11-29 18:17:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 18:17:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-29 18:17:50,574 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-11-29 18:17:50,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:17:50,574 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-29 18:17:50,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 18:17:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-29 18:17:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 18:17:50,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:17:50,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:17:50,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 18:17:50,778 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:17:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:17:50,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2041212244, now seen corresponding path program 2 times [2020-11-29 18:17:50,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:17:50,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226137541] [2020-11-29 18:17:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:17:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:17:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:17:51,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226137541] [2020-11-29 18:17:51,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891177962] [2020-11-29 18:17:51,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/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 [2020-11-29 18:17:51,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:17:51,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:17:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:17:51,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:17:51,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:17:51,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:17:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:17:51,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:17:51,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-29 18:17:51,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991353731] [2020-11-29 18:17:51,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 18:17:51,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:17:51,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 18:17:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-11-29 18:17:51,480 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 17 states. [2020-11-29 18:17:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:17:52,242 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-11-29 18:17:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 18:17:52,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-11-29 18:17:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:17:52,244 INFO L225 Difference]: With dead ends: 34 [2020-11-29 18:17:52,245 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 18:17:52,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2020-11-29 18:17:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 18:17:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-11-29 18:17:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 18:17:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-29 18:17:52,258 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-11-29 18:17:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:17:52,259 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-29 18:17:52,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 18:17:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-29 18:17:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 18:17:52,262 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:17:52,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:17:52,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:17:52,473 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:17:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:17:52,474 INFO L82 PathProgramCache]: Analyzing trace with hash -511798398, now seen corresponding path program 1 times [2020-11-29 18:17:52,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:17:52,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800653130] [2020-11-29 18:17:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:17:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:17:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:17:52,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800653130] [2020-11-29 18:17:52,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707748066] [2020-11-29 18:17:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/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 [2020-11-29 18:17:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:17:52,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 18:17:52,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:17:53,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:17:53,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:17:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:17:53,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:17:53,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2020-11-29 18:17:53,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829050826] [2020-11-29 18:17:53,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 18:17:53,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:17:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 18:17:53,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-29 18:17:53,167 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 20 states. [2020-11-29 18:17:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:17:54,115 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-11-29 18:17:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 18:17:54,116 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 18 [2020-11-29 18:17:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:17:54,116 INFO L225 Difference]: With dead ends: 31 [2020-11-29 18:17:54,116 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 18:17:54,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 18:17:54,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 18:17:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 18:17:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 18:17:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 18:17:54,119 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-11-29 18:17:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:17:54,119 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:17:54,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 18:17:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 18:17:54,120 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 18:17:54,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:17:54,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 18:17:54,437 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 18:17:54,437 INFO L274 CegarLoopResult]: For program point L29(lines 29 35) no Hoare annotation was computed. [2020-11-29 18:17:54,437 INFO L274 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-11-29 18:17:54,437 INFO L274 CegarLoopResult]: For program point L29-2(lines 29 35) no Hoare annotation was computed. [2020-11-29 18:17:54,437 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-29 18:17:54,438 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 18:17:54,438 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 18:17:54,438 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 18:17:54,438 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (+ ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) (.cse1 (* 3 ULTIMATE.start_main_~i~0))) (and (<= .cse0 (* 3 ULTIMATE.start_main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-11-29 18:17:54,438 INFO L274 CegarLoopResult]: For program point L28-3(lines 28 37) no Hoare annotation was computed. [2020-11-29 18:17:54,439 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-29 18:17:54,439 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-29 18:17:54,439 INFO L277 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-11-29 18:17:54,439 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-29 18:17:54,439 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-29 18:17:54,439 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-29 18:17:54,439 INFO L277 CegarLoopResult]: At program point L39(lines 24 40) the Hoare annotation is: true [2020-11-29 18:17:54,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:17:54 BoogieIcfgContainer [2020-11-29 18:17:54,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:17:54,457 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:17:54,458 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:17:54,458 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:17:54,458 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:17:48" (3/4) ... [2020-11-29 18:17:54,462 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 18:17:54,472 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 18:17:54,473 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 18:17:54,473 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 18:17:54,473 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 18:17:54,529 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a9727cf4-7380-4be8-b004-cb11bd5029c8/bin/uautomizer/witness.graphml [2020-11-29 18:17:54,533 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:17:54,536 INFO L168 Benchmark]: Toolchain (without parser) took 6823.44 ms. Allocated memory was 111.1 MB in the beginning and 176.2 MB in the end (delta: 65.0 MB). Free memory was 88.1 MB in the beginning and 112.0 MB in the end (delta: -23.8 MB). Peak memory consumption was 40.8 MB. Max. memory is 16.1 GB. [2020-11-29 18:17:54,537 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 111.1 MB. Free memory was 71.2 MB in the beginning and 71.1 MB in the end (delta: 56.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:17:54,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.42 ms. Allocated memory is still 111.1 MB. Free memory was 88.1 MB in the beginning and 88.2 MB in the end (delta: -59.1 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:17:54,538 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.42 ms. Allocated memory is still 111.1 MB. Free memory was 88.2 MB in the beginning and 86.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:17:54,539 INFO L168 Benchmark]: Boogie Preprocessor took 43.59 ms. Allocated memory is still 111.1 MB. Free memory was 86.9 MB in the beginning and 85.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:17:54,540 INFO L168 Benchmark]: RCFGBuilder took 446.63 ms. Allocated memory is still 111.1 MB. Free memory was 85.8 MB in the beginning and 73.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:17:54,540 INFO L168 Benchmark]: TraceAbstraction took 5799.68 ms. Allocated memory was 111.1 MB in the beginning and 176.2 MB in the end (delta: 65.0 MB). Free memory was 73.6 MB in the beginning and 114.1 MB in the end (delta: -40.5 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:17:54,541 INFO L168 Benchmark]: Witness Printer took 75.60 ms. Allocated memory is still 176.2 MB. Free memory was 114.1 MB in the beginning and 112.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:17:54,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 111.1 MB. Free memory was 71.2 MB in the beginning and 71.1 MB in the end (delta: 56.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 405.42 ms. Allocated memory is still 111.1 MB. Free memory was 88.1 MB in the beginning and 88.2 MB in the end (delta: -59.1 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.42 ms. Allocated memory is still 111.1 MB. Free memory was 88.2 MB in the beginning and 86.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.59 ms. Allocated memory is still 111.1 MB. Free memory was 86.9 MB in the beginning and 85.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 446.63 ms. Allocated memory is still 111.1 MB. Free memory was 85.8 MB in the beginning and 73.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5799.68 ms. Allocated memory was 111.1 MB in the beginning and 176.2 MB in the end (delta: 65.0 MB). Free memory was 73.6 MB in the beginning and 114.1 MB in the end (delta: -40.5 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. * Witness Printer took 75.60 ms. Allocated memory is still 176.2 MB. Free memory was 114.1 MB in the beginning and 112.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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: 28]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.5s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 53 SDslu, 117 SDs, 0 SdLazy, 477 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 11 NumberOfFragments, 24 HoareAnnotationTreeSize, 3 FomulaSimplifications, 148 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 11797 SizeOfPredicates, 18 NumberOfNonLiveVariables, 202 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 1/36 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...