./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark11_linear.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark11_linear.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7cade2448c0840b34de4fc0011fce849b7a398d5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:27:16,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:27:16,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:27:16,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:27:16,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:27:16,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:27:16,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:27:16,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:27:16,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:27:16,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:27:16,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:27:16,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:27:16,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:27:16,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:27:16,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:27:16,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:27:16,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:27:16,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:27:16,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:27:16,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:27:16,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:27:16,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:27:16,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:27:16,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:27:16,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:27:16,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:27:16,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:27:16,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:27:16,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:27:16,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:27:16,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:27:16,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:27:16,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:27:16,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:27:16,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:27:16,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:27:16,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:27:16,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:27:16,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:27:16,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:27:16,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:27:16,139 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-10-11 02:27:16,164 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:27:16,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:27:16,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:27:16,166 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:27:16,166 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:27:16,166 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:27:16,166 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:27:16,167 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:27:16,167 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:27:16,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:27:16,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:27:16,168 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:27:16,168 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:27:16,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:27:16,168 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:27:16,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:27:16,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:27:16,169 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:27:16,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:27:16,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:27:16,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:27:16,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:27:16,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:27:16,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:27:16,175 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-11 02:27:16,175 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:27:16,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:27:16,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:27:16,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:27:16,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:27:16,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:27:16,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:27:16,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:27:16,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:27:16,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:27:16,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:27:16,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:27:16,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:27:16,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:27:16,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:27:16,178 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cade2448c0840b34de4fc0011fce849b7a398d5 [2021-10-11 02:27:16,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:27:16,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:27:16,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:27:16,471 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:27:16,471 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:27:16,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loop-zilu/benchmark11_linear.i [2021-10-11 02:27:16,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/data/173a5e2cb/86b59898af2345f48255f34c619d3d2f/FLAGb75ca1cfe [2021-10-11 02:27:17,008 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:27:17,009 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/sv-benchmarks/c/loop-zilu/benchmark11_linear.i [2021-10-11 02:27:17,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/data/173a5e2cb/86b59898af2345f48255f34c619d3d2f/FLAGb75ca1cfe [2021-10-11 02:27:17,391 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/data/173a5e2cb/86b59898af2345f48255f34c619d3d2f [2021-10-11 02:27:17,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:27:17,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:27:17,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:17,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:27:17,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:27:17,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@491e88de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17, skipping insertion in model container [2021-10-11 02:27:17,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:27:17,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:27:17,639 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/sv-benchmarks/c/loop-zilu/benchmark11_linear.i[868,881] [2021-10-11 02:27:17,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:17,664 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:27:17,676 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/sv-benchmarks/c/loop-zilu/benchmark11_linear.i[868,881] [2021-10-11 02:27:17,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:17,693 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:27:17,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17 WrapperNode [2021-10-11 02:27:17,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:17,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:17,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:27:17,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:27:17,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:17,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:27:17,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:27:17,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:27:17,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... [2021-10-11 02:27:17,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:27:17,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:27:17,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:27:17,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:27:17,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:17,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:27:17,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:27:17,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:27:17,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:27:18,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:27:18,120 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:27:18,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:18 BoogieIcfgContainer [2021-10-11 02:27:18,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:27:18,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:27:18,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:27:18,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:27:18,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:17" (1/3) ... [2021-10-11 02:27:18,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42bf2a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:18, skipping insertion in model container [2021-10-11 02:27:18,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:17" (2/3) ... [2021-10-11 02:27:18,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42bf2a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:18, skipping insertion in model container [2021-10-11 02:27:18,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:18" (3/3) ... [2021-10-11 02:27:18,132 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark11_linear.i [2021-10-11 02:27:18,146 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:27:18,149 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-10-11 02:27:18,160 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-11 02:27:18,184 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:27:18,184 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:27:18,184 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:27:18,184 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:27:18,185 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:27:18,185 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:27:18,185 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:27:18,185 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:27:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2021-10-11 02:27:18,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:27:18,203 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:18,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:27:18,204 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:18,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1973446, now seen corresponding path program 1 times [2021-10-11 02:27:18,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:18,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479927224] [2021-10-11 02:27:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:18,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479927224] [2021-10-11 02:27:18,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:18,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:18,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366478509] [2021-10-11 02:27:18,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:18,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:18,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:18,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:18,395 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2021-10-11 02:27:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:18,450 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-10-11 02:27:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:27:18,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:27:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:18,460 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:27:18,460 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:27:18,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:27:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:27:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2021-10-11 02:27:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:27:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-11 02:27:18,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 4 [2021-10-11 02:27:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:18,493 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-11 02:27:18,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-11 02:27:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:27:18,494 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:18,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:27:18,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:27:18,495 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash 61176876, now seen corresponding path program 1 times [2021-10-11 02:27:18,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:18,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74842499] [2021-10-11 02:27:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:18,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74842499] [2021-10-11 02:27:18,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:18,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:18,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540788725] [2021-10-11 02:27:18,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:18,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:18,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:18,577 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2021-10-11 02:27:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:18,616 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-10-11 02:27:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:18,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-10-11 02:27:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:18,620 INFO L225 Difference]: With dead ends: 9 [2021-10-11 02:27:18,620 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:27:18,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:27:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:27:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:27:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:27:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-11 02:27:18,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-10-11 02:27:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:18,626 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-11 02:27:18,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-11 02:27:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:27:18,628 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:18,628 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-11 02:27:18,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:27:18,629 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:18,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1338562834, now seen corresponding path program 1 times [2021-10-11 02:27:18,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:18,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160517091] [2021-10-11 02:27:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:18,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160517091] [2021-10-11 02:27:18,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633739880] [2021-10-11 02:27:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:18,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:27:18,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:18,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309775508] [2021-10-11 02:27:19,055 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:27:19,055 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:27:19,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:27:19,066 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:27:19,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:27:19,648 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:27:19,920 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-10-11 02:27:20,170 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-10-11 02:27:20,370 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:27:20,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:27:20,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-10-11 02:27:20,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859094678] [2021-10-11 02:27:20,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:27:20,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:20,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:27:20,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:27:20,373 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 10 states. [2021-10-11 02:27:20,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:20,476 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-10-11 02:27:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:27:20,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2021-10-11 02:27:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:20,478 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:27:20,478 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 02:27:20,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:27:20,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 02:27:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-11 02:27:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:27:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-11 02:27:20,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2021-10-11 02:27:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:20,489 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-11 02:27:20,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:27:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-11 02:27:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:27:20,490 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:20,490 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2021-10-11 02:27:20,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:27:20,715 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:20,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2085963066, now seen corresponding path program 2 times [2021-10-11 02:27:20,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:20,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6139960] [2021-10-11 02:27:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:20,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6139960] [2021-10-11 02:27:20,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863760762] [2021-10-11 02:27:20,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:20,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:27:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:27:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:27:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-11 02:27:20,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-11 02:27:20,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381394510] [2021-10-11 02:27:20,959 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:27:20,960 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:27:20,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:27:20,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:27:20,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:27:21,186 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:27:21,388 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-10-11 02:27:21,624 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-10-11 02:27:21,807 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:27:21,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:27:21,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 2, 2] total 13 [2021-10-11 02:27:21,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256353564] [2021-10-11 02:27:21,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-10-11 02:27:21,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:21,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-11 02:27:21,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:27:21,811 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2021-10-11 02:27:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:22,030 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-10-11 02:27:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-11 02:27:22,031 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2021-10-11 02:27:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:22,031 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:27:22,031 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:27:22,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-10-11 02:27:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:27:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:27:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:27:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:27:22,033 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-10-11 02:27:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:22,033 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:27:22,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-10-11 02:27:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:27:22,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:27:22,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:27:22,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:27:22,247 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2021-10-11 02:27:22,248 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:27:22,248 INFO L265 CegarLoopResult]: At program point L27(lines 19 28) the Hoare annotation is: true [2021-10-11 02:27:22,248 INFO L258 CegarLoopResult]: At program point L23-2(lines 23 25) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~n~0 2147483647)) [2021-10-11 02:27:22,248 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2021-10-11 02:27:22,248 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:27:22,249 INFO L262 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-11 02:27:22,249 INFO L262 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-10-11 02:27:22,249 INFO L262 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2021-10-11 02:27:22,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:22 BoogieIcfgContainer [2021-10-11 02:27:22,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:22,274 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:22,275 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:22,275 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:22,275 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:18" (3/4) ... [2021-10-11 02:27:22,282 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:27:22,292 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-11 02:27:22,293 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-11 02:27:22,293 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:27:22,293 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:27:22,342 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0dcb13b-bbf8-40d3-836a-0a9d1ebfb9bc/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:22,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:22,343 INFO L168 Benchmark]: Toolchain (without parser) took 4946.16 ms. Allocated memory was 125.8 MB in the beginning and 161.5 MB in the end (delta: 35.7 MB). Free memory was 90.6 MB in the beginning and 84.7 MB in the end (delta: 5.9 MB). Peak memory consumption was 40.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:22,344 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 125.8 MB. Free memory was 99.9 MB in the beginning and 99.9 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:22,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.96 ms. Allocated memory is still 125.8 MB. Free memory was 90.6 MB in the beginning and 101.1 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:22,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.64 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 99.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:22,345 INFO L168 Benchmark]: Boogie Preprocessor took 19.26 ms. Allocated memory is still 125.8 MB. Free memory was 99.8 MB in the beginning and 99.0 MB in the end (delta: 789.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:22,346 INFO L168 Benchmark]: RCFGBuilder took 366.39 ms. Allocated memory is still 125.8 MB. Free memory was 99.0 MB in the beginning and 83.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:22,346 INFO L168 Benchmark]: TraceAbstraction took 4149.97 ms. Allocated memory was 125.8 MB in the beginning and 161.5 MB in the end (delta: 35.7 MB). Free memory was 83.0 MB in the beginning and 86.8 MB in the end (delta: -3.8 MB). Peak memory consumption was 32.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:22,352 INFO L168 Benchmark]: Witness Printer took 68.05 ms. Allocated memory is still 161.5 MB. Free memory was 86.8 MB in the beginning and 84.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:22,357 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 125.8 MB. Free memory was 99.9 MB in the beginning and 99.9 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 274.96 ms. Allocated memory is still 125.8 MB. Free memory was 90.6 MB in the beginning and 101.1 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.64 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 99.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.26 ms. Allocated memory is still 125.8 MB. Free memory was 99.8 MB in the beginning and 99.0 MB in the end (delta: 789.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 366.39 ms. Allocated memory is still 125.8 MB. Free memory was 99.0 MB in the beginning and 83.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4149.97 ms. Allocated memory was 125.8 MB in the beginning and 161.5 MB in the end (delta: 35.7 MB). Free memory was 83.0 MB in the beginning and 86.8 MB in the end (delta: -3.8 MB). Peak memory consumption was 32.7 MB. Max. memory is 16.1 GB. * Witness Printer took 68.05 ms. Allocated memory is still 161.5 MB. Free memory was 86.8 MB in the beginning and 84.7 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: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 <= x && n <= 2147483647 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 41 SDslu, 15 SDs, 0 SdLazy, 93 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.7s 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, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 8 NumberOfFragments, 8 HoareAnnotationTreeSize, 2 FomulaSimplifications, 57 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 55 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 2344 SizeOfPredicates, 5 NumberOfNonLiveVariables, 79 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 44/84 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...