./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de6f1b0c31f6078d1329908bc6a1fa31b1de3eefc77e75c566f65f8bba6f4e00 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:42:24,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:42:24,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:42:24,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:42:24,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:42:24,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:42:24,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:42:24,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:42:24,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:42:24,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:42:24,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:42:24,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:42:24,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:42:24,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:42:24,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:42:24,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:42:24,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:42:24,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:42:24,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:42:24,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:42:24,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:42:24,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:42:24,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:42:24,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:42:24,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:42:24,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:42:24,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:42:24,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:42:24,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:42:24,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:42:24,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:42:24,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:42:24,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:42:24,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:42:24,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:42:24,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:42:24,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:42:24,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:42:24,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:42:24,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:42:24,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:42:24,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:42:24,803 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:42:24,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:42:24,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:42:24,806 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:42:24,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:42:24,807 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:42:24,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:42:24,815 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:42:24,815 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:42:24,815 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:42:24,817 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:42:24,817 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:42:24,818 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:42:24,818 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:42:24,818 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:42:24,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:42:24,821 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:42:24,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:42:24,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:42:24,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:42:24,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:42:24,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:42:24,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:42:24,823 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:42:24,824 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:42:24,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:42:24,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:42:24,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:42:24,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:42:24,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:42:24,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:42:24,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:42:24,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:42:24,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:42:24,829 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:42:24,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:42:24,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:42:24,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:42:24,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:42:24,830 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_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de6f1b0c31f6078d1329908bc6a1fa31b1de3eefc77e75c566f65f8bba6f4e00 [2021-10-29 05:42:25,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:42:25,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:42:25,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:42:25,258 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:42:25,259 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:42:25,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c [2021-10-29 05:42:25,337 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/data/c384b7711/e7b288f73dff49e7ba2bbdd1e2e0e2ae/FLAGefaf9a7a1 [2021-10-29 05:42:25,891 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:42:25,893 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c [2021-10-29 05:42:25,909 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/data/c384b7711/e7b288f73dff49e7ba2bbdd1e2e0e2ae/FLAGefaf9a7a1 [2021-10-29 05:42:26,251 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/data/c384b7711/e7b288f73dff49e7ba2bbdd1e2e0e2ae [2021-10-29 05:42:26,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:42:26,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:42:26,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:42:26,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:42:26,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:42:26,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dd4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26, skipping insertion in model container [2021-10-29 05:42:26,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:42:26,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:42:26,620 WARN L228 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_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2021-10-29 05:42:26,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:42:26,646 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:42:26,675 WARN L228 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_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2021-10-29 05:42:26,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:42:26,696 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:42:26,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26 WrapperNode [2021-10-29 05:42:26,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:42:26,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:42:26,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:42:26,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:42:26,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:42:26,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:42:26,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:42:26,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:42:26,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:42:26,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:42:26,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:42:26,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:42:26,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (1/1) ... [2021-10-29 05:42:26,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:42:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:42:26,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:42:26,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:42:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:42:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:42:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:42:26,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:42:27,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:42:27,138 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-29 05:42:27,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:42:27 BoogieIcfgContainer [2021-10-29 05:42:27,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:42:27,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:42:27,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:42:27,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:42:27,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:42:26" (1/3) ... [2021-10-29 05:42:27,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfad628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:42:27, skipping insertion in model container [2021-10-29 05:42:27,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:42:26" (2/3) ... [2021-10-29 05:42:27,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfad628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:42:27, skipping insertion in model container [2021-10-29 05:42:27,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:42:27" (3/3) ... [2021-10-29 05:42:27,153 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2021-10-29 05:42:27,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:42:27,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:42:27,221 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:42:27,230 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:42:27,230 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:42:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:42:27,253 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:42:27,254 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:42:27,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:42:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:42:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1724589170, now seen corresponding path program 1 times [2021-10-29 05:42:27,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:42:27,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784610248] [2021-10-29 05:42:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:42:27,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:42:27,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:42:27,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517350037] [2021-10-29 05:42:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:42:27,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:42:27,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:42:27,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:42:27,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:42:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:42:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:42:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:42:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:42:27,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:42:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:42:27,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:42:27,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784610248] [2021-10-29 05:42:27,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:42:27,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517350037] [2021-10-29 05:42:27,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517350037] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:42:27,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:42:27,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-29 05:42:27,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719371683] [2021-10-29 05:42:27,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:42:27,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:42:27,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:42:27,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:42:27,744 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:42:27,811 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-10-29 05:42:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:42:27,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-29 05:42:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:42:27,823 INFO L225 Difference]: With dead ends: 17 [2021-10-29 05:42:27,823 INFO L226 Difference]: Without dead ends: 8 [2021-10-29 05:42:27,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:42:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-29 05:42:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-29 05:42:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-29 05:42:27,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-29 05:42:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:42:27,866 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-29 05:42:27,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-29 05:42:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 05:42:27,868 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:42:27,868 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:42:27,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:42:28,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:42:28,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:42:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:42:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1922594244, now seen corresponding path program 1 times [2021-10-29 05:42:28,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:42:28,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494410388] [2021-10-29 05:42:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:42:28,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:42:28,116 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:42:28,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518737477] [2021-10-29 05:42:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:42:28,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:42:28,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:42:28,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:42:28,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:42:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:42:28,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:42:28,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:42:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:42:28,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:42:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:42:28,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:42:28,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494410388] [2021-10-29 05:42:28,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:42:28,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518737477] [2021-10-29 05:42:28,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518737477] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:42:28,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10289483] [2021-10-29 05:42:28,769 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-29 05:42:28,770 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:42:28,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:42:28,796 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:42:28,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:42:28,833 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:28,836 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:42:28,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:28,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:42:28,841 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:42:28,847 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:28,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:42:28,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-10-29 05:42:28,884 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-10-29 05:42:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:28,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:28,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-29 05:42:28,941 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:28,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:42:28,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:28,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:42:28,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:42:28,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:28,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:29,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:29,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:29,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:29,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-29 05:42:29,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:29,048 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:42:29,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:29,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:42:29,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:42:29,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:29,115 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:29,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-29 05:42:29,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:42:29,120 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:130, output treesize:105 [2021-10-29 05:42:29,147 INFO L180 QuantifierPusher]: treesize reduction 8, result has 93.9 percent of original size [2021-10-29 05:42:29,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-29 05:42:29,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,371 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.0 percent of original size [2021-10-29 05:42:29,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-10-29 05:42:29,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:29,513 INFO L180 QuantifierPusher]: treesize reduction 42, result has 58.8 percent of original size [2021-10-29 05:42:29,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-29 05:42:29,526 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:42:30,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:42:30,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:42:30,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-29 05:42:30,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798081367] [2021-10-29 05:42:30,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:42:30,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:42:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:42:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-29 05:42:30,357 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:42:30,432 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-10-29 05:42:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:42:30,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-29 05:42:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:42:30,435 INFO L225 Difference]: With dead ends: 12 [2021-10-29 05:42:30,437 INFO L226 Difference]: Without dead ends: 9 [2021-10-29 05:42:30,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:42:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-29 05:42:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-29 05:42:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-29 05:42:30,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-10-29 05:42:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:42:30,447 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-29 05:42:30,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-29 05:42:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:42:30,449 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:42:30,449 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-29 05:42:30,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:42:30,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:42:30,657 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:42:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:42:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash -529183054, now seen corresponding path program 2 times [2021-10-29 05:42:30,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:42:30,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890407633] [2021-10-29 05:42:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:42:30,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:42:30,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:42:30,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11926213] [2021-10-29 05:42:30,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 05:42:30,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:42:30,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:42:30,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:42:30,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 05:42:30,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-29 05:42:30,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:42:30,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-29 05:42:30,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:42:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:42:30,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:42:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 05:42:31,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:42:31,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890407633] [2021-10-29 05:42:31,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:42:31,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11926213] [2021-10-29 05:42:31,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11926213] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:42:31,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069471905] [2021-10-29 05:42:31,297 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-29 05:42:31,297 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:42:31,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:42:31,298 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:42:31,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:42:31,312 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,314 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:42:31,318 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:42:31,320 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:42:31,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:42:31,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-10-29 05:42:31,329 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-10-29 05:42:31,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-29 05:42:31,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,345 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:42:31,346 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:42:31,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:42:31,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:42:31,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-29 05:42:31,387 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:42:31,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:42:31,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:42:31,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:42:31,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-29 05:42:31,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:42:31,409 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:130, output treesize:105 [2021-10-29 05:42:31,421 INFO L180 QuantifierPusher]: treesize reduction 8, result has 93.9 percent of original size [2021-10-29 05:42:31,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-29 05:42:31,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,549 INFO L180 QuantifierPusher]: treesize reduction 8, result has 97.4 percent of original size [2021-10-29 05:42:31,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 301 [2021-10-29 05:42:31,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:31,657 INFO L180 QuantifierPusher]: treesize reduction 42, result has 58.8 percent of original size [2021-10-29 05:42:31,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-29 05:42:31,667 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:42:32,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:42:32,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:42:32,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-10-29 05:42:32,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655072272] [2021-10-29 05:42:32,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:42:32,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:42:32,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:42:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-29 05:42:32,497 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:42:32,993 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-29 05:42:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:42:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 05:42:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:42:32,994 INFO L225 Difference]: With dead ends: 11 [2021-10-29 05:42:32,994 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 05:42:32,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-29 05:42:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 05:42:32,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 05:42:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 05:42:32,995 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-10-29 05:42:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:42:32,996 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 05:42:32,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:42:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 05:42:32,996 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 05:42:32,999 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:42:33,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:42:33,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-29 05:42:33,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-29 05:42:33,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:33,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:42:33,357 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-29 05:42:33,358 INFO L857 garLoopResultBuilder]: For program point L25(lines 25 59) no Hoare annotation was computed. [2021-10-29 05:42:33,358 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 60) no Hoare annotation was computed. [2021-10-29 05:42:33,358 INFO L853 garLoopResultBuilder]: At program point L38(lines 30 59) the Hoare annotation is: (and (forall ((ULTIMATE.start_main_~main__n~0 Int)) (or (= (+ ULTIMATE.start_main_~main__n~0 (* ULTIMATE.start_main_~main__n~0 ULTIMATE.start_main_~main__n~0)) (+ (* 2 ULTIMATE.start_main_~main__i~0) (* 2 ULTIMATE.start_main_~main__sum~0))) (< ULTIMATE.start_main_~main__n~0 ULTIMATE.start_main_~main__i~0) (<= (+ ULTIMATE.start_main_~main__i~0 1) ULTIMATE.start_main_~main__n~0))) (or (= (+ ULTIMATE.start_main_~main__n~0 (* ULTIMATE.start_main_~main__n~0 ULTIMATE.start_main_~main__n~0)) (* 2 ULTIMATE.start_main_~main__sum~0)) (<= ULTIMATE.start_main_~main__i~0 ULTIMATE.start_main_~main__n~0)) (<= 1 ULTIMATE.start_main_~main__n~0)) [2021-10-29 05:42:33,358 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-29 05:42:33,359 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 49) no Hoare annotation was computed. [2021-10-29 05:42:33,359 INFO L860 garLoopResultBuilder]: At program point L55(lines 13 61) the Hoare annotation is: true [2021-10-29 05:42:33,359 INFO L857 garLoopResultBuilder]: For program point L49(line 49) no Hoare annotation was computed. [2021-10-29 05:42:33,359 INFO L857 garLoopResultBuilder]: For program point L47(lines 47 56) no Hoare annotation was computed. [2021-10-29 05:42:33,363 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1] [2021-10-29 05:42:33,365 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:42:33,373 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,374 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,374 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,374 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,375 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,382 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,383 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,383 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,383 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,384 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:42:33 BoogieIcfgContainer [2021-10-29 05:42:33,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:42:33,386 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:42:33,386 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:42:33,386 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:42:33,387 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:42:27" (3/4) ... [2021-10-29 05:42:33,390 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 05:42:33,401 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-29 05:42:33,402 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-29 05:42:33,402 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 05:42:33,402 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 05:42:33,440 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:42:33,441 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:42:33,442 INFO L168 Benchmark]: Toolchain (without parser) took 7181.00 ms. Allocated memory was 88.1 MB in the beginning and 140.5 MB in the end (delta: 52.4 MB). Free memory was 50.7 MB in the beginning and 104.1 MB in the end (delta: -53.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:42:33,443 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory is still 66.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:42:33,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 430.18 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 50.5 MB in the beginning and 90.6 MB in the end (delta: -40.1 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:42:33,444 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.05 ms. Allocated memory is still 115.3 MB. Free memory was 90.6 MB in the beginning and 89.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:42:33,444 INFO L168 Benchmark]: Boogie Preprocessor took 42.73 ms. Allocated memory is still 115.3 MB. Free memory was 89.1 MB in the beginning and 88.3 MB in the end (delta: 754.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:42:33,445 INFO L168 Benchmark]: RCFGBuilder took 358.82 ms. Allocated memory is still 115.3 MB. Free memory was 88.2 MB in the beginning and 78.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:42:33,445 INFO L168 Benchmark]: TraceAbstraction took 6241.95 ms. Allocated memory was 115.3 MB in the beginning and 140.5 MB in the end (delta: 25.2 MB). Free memory was 77.9 MB in the beginning and 107.2 MB in the end (delta: -29.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:42:33,446 INFO L168 Benchmark]: Witness Printer took 55.01 ms. Allocated memory is still 140.5 MB. Free memory was 107.2 MB in the beginning and 104.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:42:33,448 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory is still 66.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 430.18 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 50.5 MB in the beginning and 90.6 MB in the end (delta: -40.1 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.05 ms. Allocated memory is still 115.3 MB. Free memory was 90.6 MB in the beginning and 89.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.73 ms. Allocated memory is still 115.3 MB. Free memory was 89.1 MB in the beginning and 88.3 MB in the end (delta: 754.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 358.82 ms. Allocated memory is still 115.3 MB. Free memory was 88.2 MB in the beginning and 78.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6241.95 ms. Allocated memory was 115.3 MB in the beginning and 140.5 MB in the end (delta: 25.2 MB). Free memory was 77.9 MB in the beginning and 107.2 MB in the end (delta: -29.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 55.01 ms. Allocated memory is still 140.5 MB. Free memory was 107.2 MB in the beginning and 104.1 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.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 49]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.1s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 15 SDtfs, 26 SDslu, 16 SDs, 0 SdLazy, 60 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 18, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 41 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 73 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 2 QuantifiedInterpolants, 193 SizeOfPredicates, 12 NumberOfNonLiveVariables, 168 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 1/8 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant [2021-10-29 05:42:33,458 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,459 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,459 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,459 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,459 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,460 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,460 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,461 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,461 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] [2021-10-29 05:42:33,461 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~main__n~0,QUANTIFIED] Derived loop invariant: ((forall ULTIMATE.start_main_~main__n~0 : int :: (ULTIMATE.start_main_~main__n~0 + ULTIMATE.start_main_~main__n~0 * ULTIMATE.start_main_~main__n~0 == 2 * main__i + 2 * main__sum || ULTIMATE.start_main_~main__n~0 < main__i) || main__i + 1 <= ULTIMATE.start_main_~main__n~0) && (main__n + main__n * main__n == 2 * main__sum || main__i <= main__n)) && 1 <= main__n - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-29 05:42:33,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f88a7ac6-d1d1-4b7b-bace-29854ba3accc/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...