./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested9.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_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested9.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/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 b0874b2316aff3266709463f0d72702527bf3a82 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:14:34,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:14:34,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:14:34,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:14:34,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:14:34,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:14:34,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:14:34,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:14:34,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:14:34,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:14:34,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:14:34,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:14:34,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:14:34,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:14:34,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:14:34,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:14:34,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:14:34,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:14:34,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:14:34,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:14:34,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:14:34,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:14:34,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:14:34,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:14:34,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:14:34,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:14:34,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:14:34,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:14:34,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:14:34,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:14:34,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:14:34,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:14:34,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:14:34,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:14:34,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:14:34,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:14:34,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:14:34,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:14:34,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:14:34,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:14:34,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:14:34,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:14:34,939 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:14:34,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:14:34,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:14:34,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:14:34,941 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:14:34,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:14:34,942 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:14:34,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:14:34,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:14:34,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:14:34,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:14:34,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:14:34,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:14:34,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:14:34,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:14:34,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:14:34,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:14:34,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:14:34,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:14:34,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:14:34,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:14:34,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:14:34,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:14:34,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:14:34,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:14:34,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:14:34,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:14:34,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:14:34,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:14:34,949 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_6e747182-3179-4daa-8718-6166310b3bb5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0874b2316aff3266709463f0d72702527bf3a82 [2020-11-29 19:14:35,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:14:35,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:14:35,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:14:35,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:14:35,371 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:14:35,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/../../sv-benchmarks/c/loop-invgen/nested9.i [2020-11-29 19:14:35,479 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/data/057ea3b42/88b413711e45474ca5a762b05fa59c16/FLAG37f99d002 [2020-11-29 19:14:36,061 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:14:36,062 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/sv-benchmarks/c/loop-invgen/nested9.i [2020-11-29 19:14:36,075 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/data/057ea3b42/88b413711e45474ca5a762b05fa59c16/FLAG37f99d002 [2020-11-29 19:14:36,419 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/data/057ea3b42/88b413711e45474ca5a762b05fa59c16 [2020-11-29 19:14:36,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:14:36,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:14:36,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:14:36,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:14:36,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:14:36,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c55856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36, skipping insertion in model container [2020-11-29 19:14:36,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:14:36,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:14:36,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:14:36,710 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:14:36,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:14:36,769 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:14:36,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36 WrapperNode [2020-11-29 19:14:36,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:14:36,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:14:36,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:14:36,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:14:36,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:14:36,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:14:36,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:14:36,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:14:36,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... [2020-11-29 19:14:36,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:14:36,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:14:36,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:14:36,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:14:36,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/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 19:14:36,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:14:36,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:14:36,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:14:36,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:14:37,453 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:14:37,454 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-29 19:14:37,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:14:37 BoogieIcfgContainer [2020-11-29 19:14:37,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:14:37,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:14:37,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:14:37,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:14:37,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:14:36" (1/3) ... [2020-11-29 19:14:37,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e43189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:14:37, skipping insertion in model container [2020-11-29 19:14:37,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:14:36" (2/3) ... [2020-11-29 19:14:37,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e43189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:14:37, skipping insertion in model container [2020-11-29 19:14:37,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:14:37" (3/3) ... [2020-11-29 19:14:37,477 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-11-29 19:14:37,499 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:14:37,505 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:14:37,522 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:14:37,549 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:14:37,549 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:14:37,550 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:14:37,550 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:14:37,550 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:14:37,550 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:14:37,551 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:14:37,551 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:14:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-29 19:14:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:14:37,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:14:37,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:14:37,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:14:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:14:37,585 INFO L82 PathProgramCache]: Analyzing trace with hash -695179202, now seen corresponding path program 1 times [2020-11-29 19:14:37,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:14:37,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484930427] [2020-11-29 19:14:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:14:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:37,989 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 19:14:37,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484930427] [2020-11-29 19:14:37,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:14:37,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:14:37,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106085365] [2020-11-29 19:14:38,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:14:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:14:38,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:14:38,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:14:38,026 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-11-29 19:14:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:14:38,457 INFO L93 Difference]: Finished difference Result 74 states and 115 transitions. [2020-11-29 19:14:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:14:38,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-29 19:14:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:14:38,480 INFO L225 Difference]: With dead ends: 74 [2020-11-29 19:14:38,481 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 19:14:38,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:14:38,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 19:14:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 26. [2020-11-29 19:14:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 19:14:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-11-29 19:14:38,531 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-11-29 19:14:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:14:38,532 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-11-29 19:14:38,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:14:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-11-29 19:14:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:14:38,534 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:14:38,534 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:14:38,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:14:38,535 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:14:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:14:38,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1058384818, now seen corresponding path program 1 times [2020-11-29 19:14:38,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:14:38,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756935721] [2020-11-29 19:14:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:14:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:14:38,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756935721] [2020-11-29 19:14:38,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850377753] [2020-11-29 19:14:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/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 19:14:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:14:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:14:38,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:14:39,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:14:39,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:14:39,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:14:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:14:39,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:14:39,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2020-11-29 19:14:39,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442097545] [2020-11-29 19:14:39,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:14:39,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:14:39,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:14:39,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:14:39,120 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 7 states. [2020-11-29 19:14:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:14:39,373 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-11-29 19:14:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:14:39,374 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-29 19:14:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:14:39,376 INFO L225 Difference]: With dead ends: 50 [2020-11-29 19:14:39,376 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 19:14:39,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:14:39,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 19:14:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2020-11-29 19:14:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 19:14:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-29 19:14:39,392 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2020-11-29 19:14:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:14:39,394 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-29 19:14:39,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:14:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-29 19:14:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:14:39,398 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:14:39,399 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:14:39,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 19:14:39,626 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:14:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:14:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash -678642988, now seen corresponding path program 1 times [2020-11-29 19:14:39,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:14:39,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871776193] [2020-11-29 19:14:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:14:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:14:39,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871776193] [2020-11-29 19:14:39,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159497359] [2020-11-29 19:14:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/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 19:14:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:39,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:14:39,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:14:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 19:14:39,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:14:39,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-11-29 19:14:39,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074574338] [2020-11-29 19:14:39,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:14:39,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:14:39,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:14:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:14:39,925 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-11-29 19:14:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:14:39,965 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-11-29 19:14:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:14:39,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-29 19:14:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:14:39,967 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:14:39,967 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 19:14:39,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:14:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 19:14:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-11-29 19:14:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 19:14:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-29 19:14:39,975 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-11-29 19:14:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:14:39,975 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-29 19:14:39,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:14:39,975 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-29 19:14:39,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:14:39,976 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:14:39,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:14:40,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:14:40,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:14:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:14:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash 59855584, now seen corresponding path program 1 times [2020-11-29 19:14:40,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:14:40,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479675522] [2020-11-29 19:14:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:14:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:14:40,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479675522] [2020-11-29 19:14:40,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451891785] [2020-11-29 19:14:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/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 19:14:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:14:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:14:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:14:40,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:14:40,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-11-29 19:14:40,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924800875] [2020-11-29 19:14:40,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:14:40,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:14:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:14:40,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:14:40,560 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 11 states. [2020-11-29 19:14:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:14:40,847 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-11-29 19:14:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:14:40,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-11-29 19:14:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:14:40,851 INFO L225 Difference]: With dead ends: 50 [2020-11-29 19:14:40,851 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 19:14:40,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:14:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 19:14:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-11-29 19:14:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 19:14:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-11-29 19:14:40,861 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2020-11-29 19:14:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:14:40,861 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-11-29 19:14:40,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:14:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-11-29 19:14:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:14:40,868 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:14:40,868 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:14:41,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:14:41,094 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:14:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:14:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash 895141480, now seen corresponding path program 1 times [2020-11-29 19:14:41,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:14:41,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051253541] [2020-11-29 19:14:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:14:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 19:14:41,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051253541] [2020-11-29 19:14:41,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173095843] [2020-11-29 19:14:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:14:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:41,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:14:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:14:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 19:14:41,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:14:41,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-11-29 19:14:41,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946422262] [2020-11-29 19:14:41,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:14:41,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:14:41,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:14:41,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:14:41,395 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2020-11-29 19:14:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:14:41,483 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-11-29 19:14:41,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:14:41,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-29 19:14:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:14:41,485 INFO L225 Difference]: With dead ends: 52 [2020-11-29 19:14:41,486 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 19:14:41,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:14:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 19:14:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-11-29 19:14:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 19:14:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-29 19:14:41,504 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2020-11-29 19:14:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:14:41,504 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-29 19:14:41,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:14:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-29 19:14:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 19:14:41,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:14:41,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:14:41,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:14:41,726 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:14:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:14:41,727 INFO L82 PathProgramCache]: Analyzing trace with hash 423449338, now seen corresponding path program 2 times [2020-11-29 19:14:41,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:14:41,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112731592] [2020-11-29 19:14:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:14:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:14:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 19:14:41,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112731592] [2020-11-29 19:14:41,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967679323] [2020-11-29 19:14:41,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:14:41,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:14:41,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:14:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:14:41,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:14:41,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:14:41,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:14:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 19:14:42,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:14:42,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-11-29 19:14:42,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605659724] [2020-11-29 19:14:42,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:14:42,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:14:42,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:14:42,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:14:42,033 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 10 states. [2020-11-29 19:14:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:14:42,223 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-11-29 19:14:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:14:42,225 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-11-29 19:14:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:14:42,225 INFO L225 Difference]: With dead ends: 51 [2020-11-29 19:14:42,225 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:14:42,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:14:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:14:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:14:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:14:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:14:42,227 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-11-29 19:14:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:14:42,227 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:14:42,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:14:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:14:42,227 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:14:42,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 19:14:42,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 19:14:42,739 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-11-29 19:14:42,872 INFO L274 CegarLoopResult]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2020-11-29 19:14:42,873 INFO L270 CegarLoopResult]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse0 (<= .cse2 ULTIMATE.start_main_~j~0))) (or (and .cse0 .cse1 (<= ULTIMATE.start_main_~i~0 1) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) (and .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~i~0)) (and .cse0 (= ULTIMATE.start_main_~i~0 0) (<= (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~j~0 .cse2))))) [2020-11-29 19:14:42,873 INFO L274 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-11-29 19:14:42,873 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-29 19:14:42,873 INFO L270 CegarLoopResult]: At program point L36-2(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse2 (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)))) (or (and .cse0 (<= (+ (div (+ ULTIMATE.start_main_~j~0 (- 1)) 2) 1) ULTIMATE.start_main_~k~0) .cse1 (<= ULTIMATE.start_main_~k~0 (div ULTIMATE.start_main_~j~0 2)) (<= ULTIMATE.start_main_~i~0 1) .cse2) (and .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2))) [2020-11-29 19:14:42,873 INFO L274 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-11-29 19:14:42,873 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 19:14:42,874 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 19:14:42,874 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 19:14:42,874 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-29 19:14:42,874 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-29 19:14:42,874 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-29 19:14:42,874 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-29 19:14:42,874 INFO L274 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-11-29 19:14:42,874 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 19:14:42,874 INFO L274 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-11-29 19:14:42,875 INFO L277 CegarLoopResult]: At program point L38(lines 25 40) the Hoare annotation is: true [2020-11-29 19:14:42,875 INFO L274 CegarLoopResult]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2020-11-29 19:14:42,875 INFO L270 CegarLoopResult]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~i~0))) (or (= ULTIMATE.start_main_~i~0 0) (and (<= ULTIMATE.start_main_~i~0 1) .cse0 (<= ULTIMATE.start_main_~j~0 (* 2 ULTIMATE.start_main_~i~0))) (and (<= 2 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0))) [2020-11-29 19:14:42,875 INFO L274 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-11-29 19:14:42,875 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-29 19:14:42,875 INFO L270 CegarLoopResult]: At program point L18-2(lines 1 40) the Hoare annotation is: (and (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) [2020-11-29 19:14:42,875 INFO L277 CegarLoopResult]: At program point L39(lines 25 40) the Hoare annotation is: true [2020-11-29 19:14:42,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:14:42 BoogieIcfgContainer [2020-11-29 19:14:42,895 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:14:42,896 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:14:42,896 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:14:42,896 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:14:42,897 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:14:37" (3/4) ... [2020-11-29 19:14:42,903 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:14:42,913 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 19:14:42,913 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 19:14:42,913 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:14:42,913 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:14:42,982 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6e747182-3179-4daa-8718-6166310b3bb5/bin/uautomizer/witness.graphml [2020-11-29 19:14:42,982 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:14:42,983 INFO L168 Benchmark]: Toolchain (without parser) took 6549.11 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 72.3 MB in the beginning and 48.6 MB in the end (delta: 23.7 MB). Peak memory consumption was 43.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:14:42,984 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 102.8 MB. Free memory was 59.8 MB in the beginning and 59.8 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:14:42,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.72 ms. Allocated memory is still 102.8 MB. Free memory was 72.1 MB in the beginning and 79.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:14:42,985 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.23 ms. Allocated memory is still 102.8 MB. Free memory was 79.0 MB in the beginning and 77.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:14:42,986 INFO L168 Benchmark]: Boogie Preprocessor took 28.87 ms. Allocated memory is still 102.8 MB. Free memory was 77.5 MB in the beginning and 76.6 MB in the end (delta: 935.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:14:42,987 INFO L168 Benchmark]: RCFGBuilder took 611.36 ms. Allocated memory is still 102.8 MB. Free memory was 76.6 MB in the beginning and 62.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:14:42,987 INFO L168 Benchmark]: TraceAbstraction took 5429.91 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 62.4 MB in the beginning and 51.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 33.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:14:42,988 INFO L168 Benchmark]: Witness Printer took 86.09 ms. Allocated memory is still 123.7 MB. Free memory was 51.8 MB in the beginning and 48.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:14:42,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 102.8 MB. Free memory was 59.8 MB in the beginning and 59.8 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.72 ms. Allocated memory is still 102.8 MB. Free memory was 72.1 MB in the beginning and 79.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.23 ms. Allocated memory is still 102.8 MB. Free memory was 79.0 MB in the beginning and 77.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.87 ms. Allocated memory is still 102.8 MB. Free memory was 77.5 MB in the beginning and 76.6 MB in the end (delta: 935.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 611.36 ms. Allocated memory is still 102.8 MB. Free memory was 76.6 MB in the beginning and 62.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5429.91 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 62.4 MB in the beginning and 51.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 33.9 MB. Max. memory is 16.1 GB. * Witness Printer took 86.09 ms. Allocated memory is still 123.7 MB. Free memory was 51.8 MB in the beginning and 48.6 MB in the end (delta: 3.1 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: 34]: Loop Invariant Derived loop invariant: (i == 0 || ((i <= 1 && 1 <= i) && j <= 2 * i)) || ((2 <= n && 1 <= cond) && 1 <= i) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((2 * i <= j && i < n) && i <= 1) && j < 3 * i) || (((2 * i <= j && i < n) && 1 <= cond) && 1 <= i)) || (((2 * i <= j && i == 0) && i + 1 <= n) && j <= 2 * i) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((2 * i <= j && (j + -1) / 2 + 1 <= k) && i < n) && k <= j / 2) && i <= 1) && j < 3 * i) || (((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 190 SDslu, 215 SDs, 0 SdLazy, 307 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 6 MinimizatonAttempts, 55 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 27 NumberOfFragments, 146 HoareAnnotationTreeSize, 6 FomulaSimplifications, 1331 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 101 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 232 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 221 ConstructedInterpolants, 0 QuantifiedInterpolants, 13685 SizeOfPredicates, 19 NumberOfNonLiveVariables, 374 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 56/84 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...