./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_1_variant.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_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_1_variant.i -s /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/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 1a2ad7e0b5490d38497860251c3047d8de1153f2 ...................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:21:25,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:21:25,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:21:25,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:21:25,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:21:25,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:21:25,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:21:25,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:21:25,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:21:25,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:21:25,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:21:25,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:21:25,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:21:25,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:21:25,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:21:25,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:21:25,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:21:25,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:21:25,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:21:25,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:21:25,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:21:25,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:21:25,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:21:25,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:21:25,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:21:25,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:21:25,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:21:25,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:21:25,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:21:25,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:21:25,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:21:25,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:21:25,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:21:25,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:21:25,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:21:25,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:21:25,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:21:25,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:21:25,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:21:25,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:21:25,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:21:25,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:21:25,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:21:25,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:21:25,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:21:25,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:21:25,399 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:21:25,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:21:25,399 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:21:25,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:21:25,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:21:25,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:21:25,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:21:25,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:21:25,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:21:25,404 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:21:25,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:21:25,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:21:25,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:21:25,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:21:25,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:21:25,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:21:25,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:21:25,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:21:25,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:21:25,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:21:25,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:21:25,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:21:25,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:21:25,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:21:25,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:21:25,408 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_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a2ad7e0b5490d38497860251c3047d8de1153f2 [2020-11-28 03:21:25,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:21:25,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:21:25,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:21:25,699 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:21:25,700 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:21:25,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/../../sv-benchmarks/c/loop-new/count_by_1_variant.i [2020-11-28 03:21:25,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/data/c266c228d/366fc83b2202443c8fdfba5080098cea/FLAG90b016aa6 [2020-11-28 03:21:26,210 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:21:26,210 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/sv-benchmarks/c/loop-new/count_by_1_variant.i [2020-11-28 03:21:26,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/data/c266c228d/366fc83b2202443c8fdfba5080098cea/FLAG90b016aa6 [2020-11-28 03:21:26,592 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/data/c266c228d/366fc83b2202443c8fdfba5080098cea [2020-11-28 03:21:26,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:21:26,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:21:26,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:26,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:21:26,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:21:26,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549b3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26, skipping insertion in model container [2020-11-28 03:21:26,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:21:26,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:21:26,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:26,827 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:21:26,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:26,890 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:21:26,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26 WrapperNode [2020-11-28 03:21:26,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:26,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:21:26,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:21:26,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:21:26,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:21:26,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:21:26,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:21:26,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:21:26,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... [2020-11-28 03:21:26,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:21:26,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:21:26,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:21:26,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:21:26,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/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 [2020-11-28 03:21:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:21:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:21:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:21:27,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:21:27,152 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:21:27,152 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 03:21:27,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:27 BoogieIcfgContainer [2020-11-28 03:21:27,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:21:27,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:21:27,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:21:27,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:21:27,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:21:26" (1/3) ... [2020-11-28 03:21:27,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0934f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:27, skipping insertion in model container [2020-11-28 03:21:27,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:26" (2/3) ... [2020-11-28 03:21:27,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0934f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:27, skipping insertion in model container [2020-11-28 03:21:27,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:27" (3/3) ... [2020-11-28 03:21:27,162 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2020-11-28 03:21:27,173 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:21:27,176 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:21:27,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:21:27,212 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:21:27,212 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:21:27,213 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:21:27,213 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:21:27,213 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:21:27,213 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:21:27,213 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:21:27,213 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:21:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-28 03:21:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 03:21:27,231 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:27,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:27,232 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1809706186, now seen corresponding path program 1 times [2020-11-28 03:21:27,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:27,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367677146] [2020-11-28 03:21:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:27,529 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2020-11-28 03:21:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:27,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367677146] [2020-11-28 03:21:27,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:27,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:21:27,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871311689] [2020-11-28 03:21:27,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:27,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:27,568 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2020-11-28 03:21:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:27,640 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-11-28 03:21:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:21:27,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 03:21:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:27,655 INFO L225 Difference]: With dead ends: 32 [2020-11-28 03:21:27,660 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 03:21:27,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 03:21:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-11-28 03:21:27,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 03:21:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-28 03:21:27,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2020-11-28 03:21:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:27,712 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-28 03:21:27,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-28 03:21:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:21:27,713 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:27,714 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:27,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:21:27,714 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:27,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:27,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1600112482, now seen corresponding path program 1 times [2020-11-28 03:21:27,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:27,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498464367] [2020-11-28 03:21:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:27,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498464367] [2020-11-28 03:21:27,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437953281] [2020-11-28 03:21:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/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 [2020-11-28 03:21:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:21:27,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:27,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:27,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:27,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:21:27,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-28 03:21:27,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144748451] [2020-11-28 03:21:27,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:21:27,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:21:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:21:27,994 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2020-11-28 03:21:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:28,059 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-28 03:21:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:21:28,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-28 03:21:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:28,062 INFO L225 Difference]: With dead ends: 20 [2020-11-28 03:21:28,062 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 03:21:28,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:21:28,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 03:21:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-11-28 03:21:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 03:21:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-28 03:21:28,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2020-11-28 03:21:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:28,067 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-28 03:21:28,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:21:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-28 03:21:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:21:28,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:28,068 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:28,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 03:21:28,281 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1818442294, now seen corresponding path program 2 times [2020-11-28 03:21:28,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:28,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790910603] [2020-11-28 03:21:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:28,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790910603] [2020-11-28 03:21:28,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111145067] [2020-11-28 03:21:28,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/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 [2020-11-28 03:21:28,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:21:28,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:21:28,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:21:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:28,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:28,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:28,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:21:28,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-28 03:21:28,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554634013] [2020-11-28 03:21:28,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:21:28,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:28,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:21:28,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:21:28,466 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-11-28 03:21:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:28,535 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-28 03:21:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:21:28,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-28 03:21:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:28,543 INFO L225 Difference]: With dead ends: 23 [2020-11-28 03:21:28,544 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:21:28,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:21:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:21:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-11-28 03:21:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 03:21:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-28 03:21:28,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-11-28 03:21:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:28,549 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-28 03:21:28,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:21:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-28 03:21:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:21:28,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:28,550 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:28,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:21:28,751 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:21:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:28,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1719251358, now seen corresponding path program 3 times [2020-11-28 03:21:28,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:28,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396047031] [2020-11-28 03:21:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:21:28,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396047031] [2020-11-28 03:21:28,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846253117] [2020-11-28 03:21:28,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/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 [2020-11-28 03:21:28,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 03:21:28,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:21:28,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:21:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:28,947 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:21:28,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:28,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:29,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:21:29,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:21:29,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-28 03:21:29,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882061879] [2020-11-28 03:21:29,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:21:29,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:29,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:21:29,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:21:29,025 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2020-11-28 03:21:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:29,319 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-28 03:21:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:21:29,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-11-28 03:21:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:29,320 INFO L225 Difference]: With dead ends: 22 [2020-11-28 03:21:29,320 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:21:29,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:21:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:21:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:21:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:21:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:21:29,322 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-28 03:21:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:29,322 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:21:29,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:21:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:21:29,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:21:29,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:21:29,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:21:29,677 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:21:29,678 INFO L270 CegarLoopResult]: At program point L29(lines 24 30) the Hoare annotation is: (<= ULTIMATE.start_main_~i~0 1000000) [2020-11-28 03:21:29,678 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-28 03:21:29,678 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:21:29,678 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:21:29,678 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:21:29,678 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 03:21:29,678 INFO L270 CegarLoopResult]: At program point L26-2(lines 26 28) the Hoare annotation is: (or (= ULTIMATE.start_main_~i~0 0) (and (< ULTIMATE.start_main_~i~0 1000001) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond))) [2020-11-28 03:21:29,679 INFO L274 CegarLoopResult]: For program point L26-3(lines 26 28) no Hoare annotation was computed. [2020-11-28 03:21:29,679 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-28 03:21:29,679 INFO L270 CegarLoopResult]: At program point L18-2(lines 1 30) the Hoare annotation is: (and (not (= ULTIMATE.start_main_~i~0 1000000)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~i~0 1000000)) [2020-11-28 03:21:29,679 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-28 03:21:29,679 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-28 03:21:29,679 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-28 03:21:29,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:21:29 BoogieIcfgContainer [2020-11-28 03:21:29,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:21:29,697 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:21:29,697 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:21:29,697 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:21:29,698 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:27" (3/4) ... [2020-11-28 03:21:29,700 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:21:29,710 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-28 03:21:29,711 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:21:29,711 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:21:29,711 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:21:29,760 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3fd5779d-f31f-4a17-8a27-e3df9a4bff3b/bin/uautomizer/witness.graphml [2020-11-28 03:21:29,760 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:21:29,762 INFO L168 Benchmark]: Toolchain (without parser) took 3166.18 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 90.0 MB in the beginning and 105.8 MB in the end (delta: -15.8 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:29,763 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory was 41.9 MB in the beginning and 41.9 MB in the end (delta: 38.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:29,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.38 ms. Allocated memory is still 117.4 MB. Free memory was 89.7 MB in the beginning and 95.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:29,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.44 ms. Allocated memory is still 117.4 MB. Free memory was 95.3 MB in the beginning and 94.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:29,765 INFO L168 Benchmark]: Boogie Preprocessor took 18.14 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 93.2 MB in the end (delta: 957.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:29,768 INFO L168 Benchmark]: RCFGBuilder took 215.28 ms. Allocated memory is still 117.4 MB. Free memory was 92.9 MB in the beginning and 83.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:29,769 INFO L168 Benchmark]: TraceAbstraction took 2540.31 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 82.7 MB in the beginning and 107.9 MB in the end (delta: -25.2 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:29,769 INFO L168 Benchmark]: Witness Printer took 63.96 ms. Allocated memory is still 142.6 MB. Free memory was 107.9 MB in the beginning and 105.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:29,775 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory was 41.9 MB in the beginning and 41.9 MB in the end (delta: 38.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.38 ms. Allocated memory is still 117.4 MB. Free memory was 89.7 MB in the beginning and 95.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.44 ms. Allocated memory is still 117.4 MB. Free memory was 95.3 MB in the beginning and 94.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.14 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 93.2 MB in the end (delta: 957.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 215.28 ms. Allocated memory is still 117.4 MB. Free memory was 92.9 MB in the beginning and 83.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2540.31 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 82.7 MB in the beginning and 107.9 MB in the end (delta: -25.2 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Witness Printer took 63.96 ms. Allocated memory is still 142.6 MB. Free memory was 107.9 MB in the beginning and 105.8 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: 1]: Loop Invariant Derived loop invariant: (!(i == 1000000) && 1 == cond) && i <= 1000000 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: i <= 1000000 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: i == 0 || (i < 1000001 && 1 <= cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 49 SDslu, 65 SDs, 0 SdLazy, 63 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 16 NumberOfFragments, 25 HoareAnnotationTreeSize, 3 FomulaSimplifications, 419 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 117 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 85 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2346 SizeOfPredicates, 11 NumberOfNonLiveVariables, 151 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 14/48 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...